Software Development Exam > Software Development Videos > Python- Mastering Development in Python > Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries
Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries Video Lecture | Python- Mastering Development in Python - Software Development
|
8 videos|5 docs
|
FAQs on Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries Video Lecture - Python- Mastering Development in Python - Software Development
| 1. What are strings, lists, tuples, and dictionaries in Python? |  |
Ans. In Python, strings are a sequence of characters enclosed in single or double quotes. Lists are ordered collections of items enclosed in square brackets. Tuples are similar to lists but are immutable, meaning their elements cannot be changed. Dictionaries are key-value pairs enclosed in curly brackets, where each key is unique.
| 2. How can I access individual elements in a string? | |
Ans. Individual characters in a string can be accessed using indexing. Each character in the string has a corresponding index, starting from 0. For example, to access the first character in a string named "text", you can use "text[0]". Similarly, "text[1]" will give you the second character.
| 3. Can I modify a specific element in a list? | |
Ans. Yes, you can modify individual elements in a list. Since lists are mutable, you can assign a new value to a specific index. For example, if you have a list named "numbers" and want to change the second element, you can do "numbers[1] = new_value".
| 4. How do I add elements to a tuple? | |
Ans. Tuples are immutable, meaning you cannot add or remove elements once they are created. However, you can create a new tuple by concatenating two existing tuples. For example, if you have two tuples named "tuple1" and "tuple2", you can create a new tuple using "new_tuple = tuple1 + tuple2".
| 5. How can I remove a key-value pair from a dictionary? | |
Ans. To remove a key-value pair from a dictionary, you can use the "del" keyword followed by the key you want to remove. For example, if you have a dictionary named "my_dict" and want to remove the key "name", you can do "del my_dict['name']". This will remove the corresponding key-value pair from the dictionary.
Text Transcript from Video
hello I'm t-pain and welcome to another
lesson Python thanks so much for joining
me
if you feel like skipping ahead to any
one of the chapters above or even the
examples feel free to click into the
buttons okay so let's get started right
away again we're using Python 2.7 point
three open up idle in your window and
follow along with me to get the most out
of this exercise alright so I'll give
you second to do that okay so the focus
today is on more data types and data
structures so we're going to be going
over strings tuples lists and
dictionaries so strings are really just
a whole bunch of characters that could
be letters of the alphabet numbers it
could be characters like exclamation
point or the ampersand sign
okay so strings are declared using
quotation marks so type in x equals
single quotation ham and single
quotation enter and pythons accepts it
then type X again and you'll see ham is
spit out in single quotation marks you
can also declare them with double
quotation marks so again I'm going to do
the same thing ham sandwich x equals ham
sandwich in double quotation or yet
double quotation marks enter X enter and
again notice that it spits out single
quotation marks as well
Python is very smart in that it can
accept both single and double quotations
it's merely a matter of preference a lot
of C programmers will tell you to use
double quotations it really doesn't
matter they typically use double
quotations for any like full strings and
then single quotations for actual
characters like H or C or five or
whatever it may be okay all right so
strings work very much like the integers
in that you can add them together so
what I'm going to do here as I'm I say y
equals x plus quotations let's type book
okay
enter now type y enter and now notice
what it does ham sandwich book is all
one word all in a single string and the
only reason it didn't include a space
and that is because I didn't type one in
there so we'll go ahead and try that
again y equals x + space book I know
this doesn't make any sense but let's go
ahead and try it
ham sandwich book so notice the space
actually occurs in here so you have to
be explicit in what you're adding
together in two strings if you want a
space in there you have to declare it
alright great work
alright so you can already see just a
lot of power that Python has with
strings and being able to combine it
with different strings to combine even
or to make even bigger strings so we can
also do this with variables so I'm gonna
type Z equals 10 enter and then I'm
going to type y equals x plus Z type
that in and watch for the error that
comes out okay if say traceback cannot
concatenate string and int objects so if
you want to convert an integer or a
float value or whatever maybe into a
string value all you have to do is type
this really simple commit this function
called STR so we're going to type in y
equals x plus STR Z and what this STR
does is it converts it to a string value
all right
type enter it's accepted now type Y
again boom ham sandwich 10 so that's a
great way of combining your um your
strings with other variables
all right so combining strings with a
variable types like integers or floats
the string function works pretty well
but there's other things we can do
inside of that so let's try I'm going to
introduce you to another
you can do if you type y equals type
something and the space percent D in
quotation marks and then I want you to
type a space and then type a % and then
type Z now watch what happens what it's
going to happen is it's this percentage
sign is saying hey replace whatever's in
here with what is going to be after the
quotation marks with the second
parenthesis so saying hey insert this
integer in this location D represents
integers F represents floats so D I
don't know why it just does represent
integers type and enter and then type Y
again it says something 10 see it worked
perfectly
so if we wanted to we can also type F so
we're going to add type y equals percent
something percent F in quotations
percent Z enter and now why and look at
what happens it converted that integer Z
into a float value in here but it threw
on a lot of extra zeros so let's say we
want to actually get rid of those zeros
there's a great command that you can do
it's kind of a sneaky way of controlling
how many zeros and how many integers are
not integers but values are contained
within and after the decimal point so
what we're going to type is y equals
quotations something again because I
can't think of anything else to type
percent sign and here is where we're
going to type in the special command so
we're going to type point three or
period three and then the F in quotation
marks space % Z now watch what happens
enter and then Y enter and now notice
that it's created a float value out of
the integer value of Z
and only had three decimal points or
three zeros after the decimal point
there you go so it converted it to float
and added three extra digits so now I'm
going to convert Z to a full float value
with a whole bunch of character so I'm
going to have one point and then a whole
bunch of numbers enter okay and now
we're going to try that last command
that we did again with y equals some
thing % point 3f in quotation marks % Z
enter and then type Y again so it
rounded from six point five four etc to
six point five five so it rounded it so
that's some of the control that you have
when putting variables or converting
variables into strings okay so the next
useful command to learn is backslash N
and that backslash is right above the
enter key on your keyboard so what we're
going to do is type x equals a double
quotations teehee backslash n backslash
n s T in quotations enter now what's
going to happen is X is going to spit
out just as is so type in X enter now
when you're actually programming modules
the you're going to use a debugging tool
called prints it's just a simple
function just type prints and then
whatever you want to print out and so
for me I'm going to type X now watch
what happens when I do this so it
actually the backslash n is a way of
saying a newline so what it will do is
it'll just basically press Enter every
time it comes across that specific
combination of characters so backslash n
is enter and then types enter again and
then it says s T so test is what we're
going for
perfect so if we just typed in test with
print notice that it won't actually have
an enter test it prints it out as you'd
expect it to no quotation marks are
included or anything it's merely
spitting out exactly the strings that is
being fed that's the print function for
you there
very very useful we'll be using that a
lot later on so next we're going to be
learning about the /t or tab inside the
string so we're going to type in x
equals double quotations te test
actually is type test test backslash T
backslash T and then another test in
quotation marks enter and then type
print ex enter and now notice what
happens T test is actually separated by
the tab function according to how many
times it was typed in so it jumps for
two different times so backslash N and
backslash T are two extremely useful
character combinations that I use a lot
when using strings so next are going to
be learning about the keyword in which
is used for conditionals that we're
going to be learning about in another
episode so wait how will you use that is
just type quotation marks what are you
checking for so we're going to check for
Ham space and the ham is in quotation
marks in which is not in quotation marks
and then ham sandwich in quotation marks
sandwich and now it's going to return
true or false depending on if ham is in
ham sandwich which we know to be true
and there it is true so n can be used
it's checking for is something in
something else so we could type in a in
ham true and there you go it works just
the way you think it would and there's a
couple other keywords that will be
learning but later on so think of list
like grocery lists at a grocery can
purchase it whatever you want you can
buy milk bread condoms or whatever it
may be I can have whatever whatever we
want inside of it so the list is the
exact same it can control or have just
about any variable type we want inside
of it including some of your own that
you've created with classes so we'll
give you the classes in another lesson
but let's go ahead and just create a
list so X
equals and then open closed bracket not
yeah not squiggly bracket just regular
bracket enter and then type X again and
it'll spit out that lists so that's the
way you declare a list so let's go ahead
and put something inside there X is
equal to and then we'll type ham in
quotation marks and then for and let's
throw in a three to point two and then
close the brackets enter and it accepts
it type in X again and it spits out
exactly what we have in the list so this
is a way of containing a list of
whatever values you'd like now you may
be asking how okay I have a list but how
do I add to it simple all you do is type
in whatever the list name is and the
type dot append and then whatever you
want to add to it so I'll say I want to
add five or yeah there you go
five so type in X dot append a
parenthesis five enter and then type X
again and now you can see that it's
added it right into the list say you
want to insert a value somewhere in
there hmm
how do we insert a value X dot inserts
parentheses and then wherever you want
to include it I so I want to say I want
to include it right after the second
object so type one and then I'm going to
type include a 3.1415 if I can type it
there we go enter and it accepted it X
boom it inserted it at the first at the
second location boom done alright great
job so now let's say that you want to
remove something from this list so the
way you do that is actually with a
function called pop so type in X dot pop
and let's pop off the first value that
we didn't like the pie nobody likes pie
and what it does is it'll actually
return the value so if you want to store
it in a variable very very useful you've
got a way of inserting and now pulling
from that list and it'll if you type X
again
it'll say it'll spit out the exact list
without that value and it'll shorten it
so there you go all right great work so
another useful function that you should
know about is a really short le n open
closed parenthesis and what it is is
it's checking for the length of a list
or a length of whatever's being fed in
so if you wanted to feed in a whole
string of characters like I could type
in words and it's a way of checking for
the length of of whatever it is since a
string is a string of characters it will
check for how many characters are inside
so it works the exact same for a list so
if we type Lang and then X close
parentheses enter it says hey you have
four items within your list this is
extremely useful for when you're doing
loops and stuffing you want to know how
many times to iterate through a list all
right great
so just like you could convert a integer
or a float into a string you can also
convert stuff into a list form all right
so to use the list function type in list
open parenthesis and then quotation
marks and then type in a ham and then in
quotation marks and parentheses enter
and now notice that it'll split it up
based on each character of the string
and now if you wanted to add in a whole
string the way you do that is you type
out let's go ahead and create a list y
equals open closed parentheses just to
create one and now we're going to go Y
dot append and we're going to add in ham
as the word enter now type Y and it's
added in the whole word itself rather
than breaking it up by a string perfect
and now to double back on a point that
we made earlier about checking if
something was in something else and
we're gonna like you could type in let's
see a s in something enter and it
returned a boolean you can also check if
something's within a list and that's
really
easy just the way you think it would be
so I'm going to type if s is in Y the
new list that we created enter and
saying no there is no value of s within
the list Y which only has ham so there
is no s and ham I'm sorry
okay so that's very useful to know for
later on down the road the next guy I
want to teach you about is tuples think
of tuples as grocery lists but they have
a no return policy in other words they
cannot be adjusted once they are created
they're pretty fixed so how do you
declare them just like you'd create a
list x equals but instead of using
brackets use parentheses and it's
wave-like setting it in stone so I'm
going to type in ham and 4 and 5 close
parenthesis enter and if you type X
again you'll see that it actually spits
out that tuple so if there are no
functions for like adding and removing
so the upsides of a temple are it's much
more efficient in terms of memory and
it's much much cleaner and if you were
to hand this off to somebody else that
means they can't really adjust it
meanwhile you don't have the flexibility
of a list you can't add remove or adjust
stuff around it's just set in stone
personally I don't use tuples very much
like at all because of their lack of
flexibility but they're very useful to
know about in your a very useful tool
for your toolkit all right so next we're
going to dive into dictionaries and
dictionaries are a way of binding a key
to a value much like a phone book or an
address book you have a name and then
you have a phone number that is bound to
that name and these things are paired
together so dictionaries have a number
of other names like hash tables and maps
you'll hear them thrown around but
they're all the same thing alright so a
way that you can actually use
dictionaries is for a let's say
attributes of a character alright so
we're going to go ahead and create this
character Sam
and make it a dictionary equal to so
make it the dictionary you just open and
close squiggly brackets enter okay so
now we've created it and now to add to
it we're going to type in Sam and then
straight bracket so we're going to type
quotation marks weapon closed quotation
marks close parentheses or brackets
equal to a chainsaw enter okay and now
we're going to add an attribute for his
health so we're going to type in Sam
straight bracket health in quotation
marks closed bracket equal to let's give
it ten enter and now we've created the
dictionary with items side so type Sam
enter and now you can see we've created
the weapon and he has a chainsaw and now
he has health of ten so right now we've
got like a way of storing his
information within a place that's based
on keywords and values so this is very
very useful and I really need to
emphasize that it can hold way more than
just integers or strings
it can hold class instances like for a
different stuff you have so if you have
an attribute for his actual weapons you
can place this string chainsaw with an
actual instance of what it is what it
does what its capabilities are whatever
it may be right there within the
dictionary so we've created values and
we've assigned them how do we actually
retrieve them just the way you think you
would Sam brackets and then type in
whatever it is that is the keyword that
you're looking for so I'm looking for
the weapon what weapon does have again
enter boom it spits it out chainsaw
there you go so the way of indexing a
web what he has is by typing it in
straight into the brackets and it'll
spit back out and so you can assign
using the brackets in the equal sign um
you can reassign using that and you can
also retrieve using just the brackets
alright so we've added we've retrieved
items from the dictionary now how do we
remove
items from the dictionary and I
personally never use this ever but you
can type in de el space the name of the
dictionary and the item so let's say he
doesn't have any more health so delete
health enter type Sam and now it has
successfully removed that property that
that attribute and there you go so
you've removed an item from the
dictionary alright guys great jobs day
here's a few more problems I want you to
work through you're going to get a lot
more out of this if you try to wrap your
brain around what they are what they do
they have a lot of great concepts in
them and let me know in the comments
below if you have any questions I'll be
happy to help out thank you so much for
watching let me know in the comments
below if you have any questions or
concerns share this with anybody you
think could really benefit from learning
Python and I look forward to seeing you
in the next video thank you so much for
joining me
lesson Python thanks so much for joining
me
if you feel like skipping ahead to any
one of the chapters above or even the
examples feel free to click into the
buttons okay so let's get started right
away again we're using Python 2.7 point
three open up idle in your window and
follow along with me to get the most out
of this exercise alright so I'll give
you second to do that okay so the focus
today is on more data types and data
structures so we're going to be going
over strings tuples lists and
dictionaries so strings are really just
a whole bunch of characters that could
be letters of the alphabet numbers it
could be characters like exclamation
point or the ampersand sign
okay so strings are declared using
quotation marks so type in x equals
single quotation ham and single
quotation enter and pythons accepts it
then type X again and you'll see ham is
spit out in single quotation marks you
can also declare them with double
quotation marks so again I'm going to do
the same thing ham sandwich x equals ham
sandwich in double quotation or yet
double quotation marks enter X enter and
again notice that it spits out single
quotation marks as well
Python is very smart in that it can
accept both single and double quotations
it's merely a matter of preference a lot
of C programmers will tell you to use
double quotations it really doesn't
matter they typically use double
quotations for any like full strings and
then single quotations for actual
characters like H or C or five or
whatever it may be okay all right so
strings work very much like the integers
in that you can add them together so
what I'm going to do here as I'm I say y
equals x plus quotations let's type book
okay
enter now type y enter and now notice
what it does ham sandwich book is all
one word all in a single string and the
only reason it didn't include a space
and that is because I didn't type one in
there so we'll go ahead and try that
again y equals x + space book I know
this doesn't make any sense but let's go
ahead and try it
ham sandwich book so notice the space
actually occurs in here so you have to
be explicit in what you're adding
together in two strings if you want a
space in there you have to declare it
alright great work
alright so you can already see just a
lot of power that Python has with
strings and being able to combine it
with different strings to combine even
or to make even bigger strings so we can
also do this with variables so I'm gonna
type Z equals 10 enter and then I'm
going to type y equals x plus Z type
that in and watch for the error that
comes out okay if say traceback cannot
concatenate string and int objects so if
you want to convert an integer or a
float value or whatever maybe into a
string value all you have to do is type
this really simple commit this function
called STR so we're going to type in y
equals x plus STR Z and what this STR
does is it converts it to a string value
all right
type enter it's accepted now type Y
again boom ham sandwich 10 so that's a
great way of combining your um your
strings with other variables
all right so combining strings with a
variable types like integers or floats
the string function works pretty well
but there's other things we can do
inside of that so let's try I'm going to
introduce you to another
you can do if you type y equals type
something and the space percent D in
quotation marks and then I want you to
type a space and then type a % and then
type Z now watch what happens what it's
going to happen is it's this percentage
sign is saying hey replace whatever's in
here with what is going to be after the
quotation marks with the second
parenthesis so saying hey insert this
integer in this location D represents
integers F represents floats so D I
don't know why it just does represent
integers type and enter and then type Y
again it says something 10 see it worked
perfectly
so if we wanted to we can also type F so
we're going to add type y equals percent
something percent F in quotations
percent Z enter and now why and look at
what happens it converted that integer Z
into a float value in here but it threw
on a lot of extra zeros so let's say we
want to actually get rid of those zeros
there's a great command that you can do
it's kind of a sneaky way of controlling
how many zeros and how many integers are
not integers but values are contained
within and after the decimal point so
what we're going to type is y equals
quotations something again because I
can't think of anything else to type
percent sign and here is where we're
going to type in the special command so
we're going to type point three or
period three and then the F in quotation
marks space % Z now watch what happens
enter and then Y enter and now notice
that it's created a float value out of
the integer value of Z
and only had three decimal points or
three zeros after the decimal point
there you go so it converted it to float
and added three extra digits so now I'm
going to convert Z to a full float value
with a whole bunch of character so I'm
going to have one point and then a whole
bunch of numbers enter okay and now
we're going to try that last command
that we did again with y equals some
thing % point 3f in quotation marks % Z
enter and then type Y again so it
rounded from six point five four etc to
six point five five so it rounded it so
that's some of the control that you have
when putting variables or converting
variables into strings okay so the next
useful command to learn is backslash N
and that backslash is right above the
enter key on your keyboard so what we're
going to do is type x equals a double
quotations teehee backslash n backslash
n s T in quotations enter now what's
going to happen is X is going to spit
out just as is so type in X enter now
when you're actually programming modules
the you're going to use a debugging tool
called prints it's just a simple
function just type prints and then
whatever you want to print out and so
for me I'm going to type X now watch
what happens when I do this so it
actually the backslash n is a way of
saying a newline so what it will do is
it'll just basically press Enter every
time it comes across that specific
combination of characters so backslash n
is enter and then types enter again and
then it says s T so test is what we're
going for
perfect so if we just typed in test with
print notice that it won't actually have
an enter test it prints it out as you'd
expect it to no quotation marks are
included or anything it's merely
spitting out exactly the strings that is
being fed that's the print function for
you there
very very useful we'll be using that a
lot later on so next we're going to be
learning about the /t or tab inside the
string so we're going to type in x
equals double quotations te test
actually is type test test backslash T
backslash T and then another test in
quotation marks enter and then type
print ex enter and now notice what
happens T test is actually separated by
the tab function according to how many
times it was typed in so it jumps for
two different times so backslash N and
backslash T are two extremely useful
character combinations that I use a lot
when using strings so next are going to
be learning about the keyword in which
is used for conditionals that we're
going to be learning about in another
episode so wait how will you use that is
just type quotation marks what are you
checking for so we're going to check for
Ham space and the ham is in quotation
marks in which is not in quotation marks
and then ham sandwich in quotation marks
sandwich and now it's going to return
true or false depending on if ham is in
ham sandwich which we know to be true
and there it is true so n can be used
it's checking for is something in
something else so we could type in a in
ham true and there you go it works just
the way you think it would and there's a
couple other keywords that will be
learning but later on so think of list
like grocery lists at a grocery can
purchase it whatever you want you can
buy milk bread condoms or whatever it
may be I can have whatever whatever we
want inside of it so the list is the
exact same it can control or have just
about any variable type we want inside
of it including some of your own that
you've created with classes so we'll
give you the classes in another lesson
but let's go ahead and just create a
list so X
equals and then open closed bracket not
yeah not squiggly bracket just regular
bracket enter and then type X again and
it'll spit out that lists so that's the
way you declare a list so let's go ahead
and put something inside there X is
equal to and then we'll type ham in
quotation marks and then for and let's
throw in a three to point two and then
close the brackets enter and it accepts
it type in X again and it spits out
exactly what we have in the list so this
is a way of containing a list of
whatever values you'd like now you may
be asking how okay I have a list but how
do I add to it simple all you do is type
in whatever the list name is and the
type dot append and then whatever you
want to add to it so I'll say I want to
add five or yeah there you go
five so type in X dot append a
parenthesis five enter and then type X
again and now you can see that it's
added it right into the list say you
want to insert a value somewhere in
there hmm
how do we insert a value X dot inserts
parentheses and then wherever you want
to include it I so I want to say I want
to include it right after the second
object so type one and then I'm going to
type include a 3.1415 if I can type it
there we go enter and it accepted it X
boom it inserted it at the first at the
second location boom done alright great
job so now let's say that you want to
remove something from this list so the
way you do that is actually with a
function called pop so type in X dot pop
and let's pop off the first value that
we didn't like the pie nobody likes pie
and what it does is it'll actually
return the value so if you want to store
it in a variable very very useful you've
got a way of inserting and now pulling
from that list and it'll if you type X
again
it'll say it'll spit out the exact list
without that value and it'll shorten it
so there you go all right great work so
another useful function that you should
know about is a really short le n open
closed parenthesis and what it is is
it's checking for the length of a list
or a length of whatever's being fed in
so if you wanted to feed in a whole
string of characters like I could type
in words and it's a way of checking for
the length of of whatever it is since a
string is a string of characters it will
check for how many characters are inside
so it works the exact same for a list so
if we type Lang and then X close
parentheses enter it says hey you have
four items within your list this is
extremely useful for when you're doing
loops and stuffing you want to know how
many times to iterate through a list all
right great
so just like you could convert a integer
or a float into a string you can also
convert stuff into a list form all right
so to use the list function type in list
open parenthesis and then quotation
marks and then type in a ham and then in
quotation marks and parentheses enter
and now notice that it'll split it up
based on each character of the string
and now if you wanted to add in a whole
string the way you do that is you type
out let's go ahead and create a list y
equals open closed parentheses just to
create one and now we're going to go Y
dot append and we're going to add in ham
as the word enter now type Y and it's
added in the whole word itself rather
than breaking it up by a string perfect
and now to double back on a point that
we made earlier about checking if
something was in something else and
we're gonna like you could type in let's
see a s in something enter and it
returned a boolean you can also check if
something's within a list and that's
really
easy just the way you think it would be
so I'm going to type if s is in Y the
new list that we created enter and
saying no there is no value of s within
the list Y which only has ham so there
is no s and ham I'm sorry
okay so that's very useful to know for
later on down the road the next guy I
want to teach you about is tuples think
of tuples as grocery lists but they have
a no return policy in other words they
cannot be adjusted once they are created
they're pretty fixed so how do you
declare them just like you'd create a
list x equals but instead of using
brackets use parentheses and it's
wave-like setting it in stone so I'm
going to type in ham and 4 and 5 close
parenthesis enter and if you type X
again you'll see that it actually spits
out that tuple so if there are no
functions for like adding and removing
so the upsides of a temple are it's much
more efficient in terms of memory and
it's much much cleaner and if you were
to hand this off to somebody else that
means they can't really adjust it
meanwhile you don't have the flexibility
of a list you can't add remove or adjust
stuff around it's just set in stone
personally I don't use tuples very much
like at all because of their lack of
flexibility but they're very useful to
know about in your a very useful tool
for your toolkit all right so next we're
going to dive into dictionaries and
dictionaries are a way of binding a key
to a value much like a phone book or an
address book you have a name and then
you have a phone number that is bound to
that name and these things are paired
together so dictionaries have a number
of other names like hash tables and maps
you'll hear them thrown around but
they're all the same thing alright so a
way that you can actually use
dictionaries is for a let's say
attributes of a character alright so
we're going to go ahead and create this
character Sam
and make it a dictionary equal to so
make it the dictionary you just open and
close squiggly brackets enter okay so
now we've created it and now to add to
it we're going to type in Sam and then
straight bracket so we're going to type
quotation marks weapon closed quotation
marks close parentheses or brackets
equal to a chainsaw enter okay and now
we're going to add an attribute for his
health so we're going to type in Sam
straight bracket health in quotation
marks closed bracket equal to let's give
it ten enter and now we've created the
dictionary with items side so type Sam
enter and now you can see we've created
the weapon and he has a chainsaw and now
he has health of ten so right now we've
got like a way of storing his
information within a place that's based
on keywords and values so this is very
very useful and I really need to
emphasize that it can hold way more than
just integers or strings
it can hold class instances like for a
different stuff you have so if you have
an attribute for his actual weapons you
can place this string chainsaw with an
actual instance of what it is what it
does what its capabilities are whatever
it may be right there within the
dictionary so we've created values and
we've assigned them how do we actually
retrieve them just the way you think you
would Sam brackets and then type in
whatever it is that is the keyword that
you're looking for so I'm looking for
the weapon what weapon does have again
enter boom it spits it out chainsaw
there you go so the way of indexing a
web what he has is by typing it in
straight into the brackets and it'll
spit back out and so you can assign
using the brackets in the equal sign um
you can reassign using that and you can
also retrieve using just the brackets
alright so we've added we've retrieved
items from the dictionary now how do we
remove
items from the dictionary and I
personally never use this ever but you
can type in de el space the name of the
dictionary and the item so let's say he
doesn't have any more health so delete
health enter type Sam and now it has
successfully removed that property that
that attribute and there you go so
you've removed an item from the
dictionary alright guys great jobs day
here's a few more problems I want you to
work through you're going to get a lot
more out of this if you try to wrap your
brain around what they are what they do
they have a lot of great concepts in
them and let me know in the comments
below if you have any questions I'll be
happy to help out thank you so much for
watching let me know in the comments
below if you have any questions or
concerns share this with anybody you
think could really benefit from learning
Python and I look forward to seeing you
in the next video thank you so much for
joining me
Related Exams
About this Video
|
2.9K Views |
|
4.60/5 Rating |
|
Dec 23, 2024 Last updated |
Video Description: Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries for Software Development 2024 is part of Python- Mastering Development in Python preparation.
The notes and questions for Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries have been prepared according to the Software Development exam syllabus.
Information about Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries covers all important topics for Software Development 2024 Exam.
Find important definitions, questions, notes, meanings, examples, exercises and tests below for Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries.
Introduction of Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries in English is available as part of our Python- Mastering Development in Python for Software Development & Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries in
Hindi for Python- Mastering Development in Python course. Download more important topics related with notes, lectures and mock test series for
Software Development Exam by signing up for free.
Description
Video Lecture & Questions for Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries Video Lecture | Python- Mastering Development in Python - Software Development - Software Development full syllabus preparation | Free video for Software Development exam to prepare for Python- Mastering Development in Python.
Information about Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries
Here you can find the meaning of Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries defined & explained in the simplest way possible.
Besides explaining types of Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries theory, EduRev gives you an ample number of questions to practice Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries tests,
examples and also practice Software Development tests.
|
8 videos|5 docs
|
|
Explore Courses for Software Development exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Sample Paper
,Tuples & Dictionaries Video Lecture | Python- Mastering Development in Python - Software Development
,shortcuts and tricks
,Tuples & Dictionaries Video Lecture | Python- Mastering Development in Python - Software Development
,Lists
,Previous Year Questions with Solutions
,past year papers
,MCQs
,Summary
,mock tests for examination
,Quickly with Python - 02 - Strings
,Extra Questions
,Important questions
,Viva Questions
,practice quizzes
,ppt
,Lists
,study material
,Quickly with Python - 02 - Strings
,Tuples & Dictionaries Video Lecture | Python- Mastering Development in Python - Software Development
,Exam
,Quickly with Python - 02 - Strings
,Objective type Questions
,video lectures
,Semester Notes
,Free
,Lists
;
Study Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries on the App
Students of Software Development can study Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Quickly with Python - 02 - Strings, Lists, Tuples & Dictionaries is prepared as per the latest Software Development syllabus.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup