cheat sheet python 3 code example

Example 1: python cheat sheet

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Example 2: python cheat sheet

print('Hello World') # print
string_name = "This is a string" # string
string_name[5:] # slicing returns "is a string"
integer_name = 4 # integer
float_name = 3.0 # float
list_name = ['a','b','cats','dogs', 1, 2.0] # list
list_name.append(3) # add to list
# list comprehension filters for int types from the previous list
list_comp = [x for x in list_name if type(x) is int]
# dictionary
dic = {"Bob":9766692343,"Alice":6123336678}
dic["Alice"] # returns 6123336678
dic_phone_numbers = dic.values() # returns list of values
dic_names = dic.keys() # returns list of keys
# class (cat object with 9 lives)
class Cat:
  def __init__(self,name):
    self.name = name
    self.lives = 9
    print(f"{name} is a cat!")
# recursive function (factorial example)
def factorial(x):
    if x == 1:
        return 1
    else:
        return (x * factorial(x-1))

Example 3: cheat sheet python

>>> spam = 'Hello'
>>> spam
'Hello'

Example 4: cheat sheet python

def foo():
    """
    This is a function docstring
    You can also use:
    ''' Function Docstring '''
    """

Example 5: cheat sheet python

>>> print('What is your name?')   # ask for their name
>>> myName = input()
>>> print('It is good to meet you, {}'.format(myName))
What is your name?
Al
It is good to meet you, Al