python cheat sheet
Best Python Cheat Sheet PDF:
https://websitesetup.org/wp-content/uploads/2020/04/Python-Cheat-Sheet.pdfpython cheat sheet
Best Python Cheat Sheet PDF:
https://websitesetup.org/wp-content/uploads/2020/04/Python-Cheat-Sheet.pdfpython 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))python collections cheat sheet
sum_of_elements = sum(<collection>)
elementwise_sum = [sum(pair) for pair in zip(list_a, list_b)]
sorted_by_second = sorted(<collection>, key=lambda el: el[1])
sorted_by_both = sorted(<collection>, key=lambda el: (el[1], el[0]))
flatter_list = list(itertools.chain.from_iterable(<list>))
product_of_elems = functools.reduce(lambda out, el: out * el, <collection>)
list_of_chars = list(<str>)cheat sheet python
>>> int(7.7) + 1
8cheat sheet python
>>> a = [1, 2, 3]
>>> if a:
>>> print("the list is not empty!")cheat sheet python
>>> spam = 'Hello'
>>> spam
'Hello'Copyright © 2021 Codeinu
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