Python MAGES Flashcards
How do you convert this to a string?
x = 50
x = str(x)
How do you convert this to an integer?
x = “20”
x = int(x)
How do you convert this to a float?
x = “20”
x = float(x)
How to check if it x an int?
x = “hello”
if type(x) == int:
print(“I am an integer!”)
How do you add 5 to x?
x = 3
x = x + 3
How to check if it x a string?
x = “hello”
if type(x) == str:
print(“I am a string!”)
How to ask the user for an input and assign it to x?
x = input()
How to ask the user for an input with a question and assign it to x?
x = input(“Type something here: “)
What is the value of x here?
x = 2**3
** is the exponent operator. It is the “to the power of” operator.
23 is 222 which equals to 8
What is the value of x here?
x = 10 // 3
// is the floor operator. It will return you only the part before the decimal point.
10 divided by 3 will give you 3.3333…, so 10//3 will give you 3.
How to check if x is equal to 20?
x = 5
if x == 20:
print(“x is equals to 20!”)
How to check if x is NOT equal to 20?
x = 5
if x != 20:
print(“x is NOT equals to 20!”)
How to check if x is less than 20?
x = 5
if x < 20:
print(“x is less than 20!”)
How to check if x is more than 20?
x = 5
if x > 20:
print(“x is more than 20!”)
How to check if x is more than or equals to 20?
x = 5
if x >= 20:
print(“x is more than or equals to 20!”)
How to check if both x and y are more than 20?
x = 5
y = 25
if x > 20 and y > 20:
print(“x and y are more than 20!”)
How to check if either x or y are more than 20?
x = 5
y = 25
if x > 20 or y > 20:
print(“either x or y are more than 20!”)
How to create an empty list x?
x = []
How to create a list that already contains 3 items?
x = [‘a’, ‘b’, ‘c’]
How to add to a list?
x = [‘a’, ‘b’, ‘c’]
x.append(‘d’)
How to get only the first 3 from the list?
x = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’]
y = x[:3]
How to get the 3rd item from the list?
x = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’]
y = x[2]
How to get the index number 4 from the list?
x = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’]
y = x[4]
How to get a copy of a list?
x = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’]
y = x[:]
How to loop through a list?
x = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’]
for i in x:
print(i)
How to sort a list alphabetically?
x = [‘a’, ‘d’, ‘c’, ‘e’, ‘b’]
x.sort()
How to reverse a list order?
x = [‘a’, ‘d’, ‘c’, ‘e’, ‘b’]
x.reverse()
OR
x.sort(reverse=True)
How to get the reverse of a list without changing the original list?
x = [‘a’, ‘d’, ‘c’, ‘e’, ‘b’]
y = x.copy()
y.sort()
How to create a list of lists?
Example:
tic_tac_toe = [
[‘X’, ‘X’, ‘O’],
[‘X’, ‘O’, ‘X’],
[‘O’, ‘O’, ‘X’]
]
How to get the middle of this list of lists?
tic_tac_toe = [
[‘X’, ‘X’, ‘O’],
[‘X’, ‘O’, ‘X’],
[‘O’, ‘O’, ‘X’]
]
tic_tac_toe[1][1]
Which will give you ‘O’
How to create an empty dictionary?
x = {}
How to create a dictionary with 2 keys and 2 values?
x = {
“name”: “David”,
“age”: 20
}
How to access the key “age” of this dictionary?
x = {
“name”: “David”,
“age”: 20
}
y = x[“age”]
print(y) # if you want to display it
How to add a new key-value pair to this dictionary?
x = {
“name”: “David”,
“age”: 20
}
x[“hobby”] = “golfing”
How to delete the “age” key-value pair in this dictionary?
x = {
“name”: “David”,
“age”: 20
}
del x[“age”]
How to create a function called func_1 that accepts no arguments?
def func_1():
print(“hello”)
How to create a function called func_1 that accepts 2 arguments?
def func_1(a, b):
print(a)
print(b)
How to create a function called func_1 that accepts 2 arguments, one of them with a default value?
def func_1(a, b = “default value”):
print(a)
print(b)
How to call this function?
def func_1(a, b):
print(a)
print(b)
func_1(“hello”, “byebye”)
How to call this function?
def func_1():
print(“hello”)
func_1()
How to check if something exists in a list?
comments = [
‘a’]
if ‘You
How to check if something exists in a list?
comments = [
‘a’]
if ‘You
How to check if something exists in a list?
x = [‘a’, ‘d’, ‘c’, ‘e’, ‘b’]
if ‘d’ in x:
print(‘d exists!’)
How to check if something is a list?
ini_list1 = [1, 2, 3, 4, 5]
ini_list2 = ‘12345’
if type(ini_list1) is list:
print(“your object is a list”)
else:
print(“your object is not a list”)
if type(ini_list2) is list:
print(“your object is a list”)
else:
print(“your object is not a list”)
How to create an empty tuple?
x = ()
How to create a tuple with 3 values inside?
x = (‘a’, ‘b’, ‘c’)
How to edit this tuple?
x = (‘a’, ‘b’, ‘c’)
Trick question! A tuple cannot be edited/mutated.
How to check if x is between 10 and 20?
x = 15
if 10 < x < 20:
print(‘Between 10 and 20!’)
How to create a new list with only the ‘b’, ‘c’ and ‘d’ in this list?
x = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’]
y = x[1:4]
How to get the last item in this list?
x = [‘a’, ‘b’, ‘c’, ‘d’, ‘e’]
y = x[-1]
How to write a single line comment in Python?
this is my comment
How to write a single line comment in Python on the same line as a code?
x = 10 # this is a comment
How to write a multi line comment in Python?
’'’This is a multi
Line comment.
It’s not really a comment
but it behaves like one.
‘’’
How to print out all the keys in this dictionary?
x = {
“name”: “David”,
“age”: 20
}
y = x.keys()
print(y)
How to print out all the values in this dictionary?
x = {
“name”: “David”,
“age”: 20
}
y = x.values()
print(y)
How to check if x is an even number?
x = 6
if x % 2 == 0:
print(“x is even!”)
