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Cheat Sheet - Python (Adrián) Cheat Sheet (DRAFT) by

Resumen esquema / chuletario

This is a draft cheat sheet. It is a work in progress and is not finished yet.

Introd­uction

Variable & Operator & Casting & Input
String
 
name = "­Cho­pit­o"
Int
 
number = 13
Operator
 
+ -  * / // %
Input
 
example = input(­"­Who­?:")
Casting
 
number = int(in­put­("is 1?:"))
Print & Type
Print
 
print(­"­nam­e:", name)
Printf
 
print(­f"na­me:­{na­me}­")
Type
 
type(name)
Condit­ional
IF
 
(if elif else)
MATCH
 
match option: case 1: case _:
Loop
For
 
for i in range(10) | for x in y
While
 
while n <= 13:
List
List
 
exampl­e_list = ["hi­", "­bye­", 13]
Len
 
len(ex­amp­le_­list)
Position
 
exampl­e_l­ist[0]
Range
 
exampl­e_l­ist­[0:1] | exampl­e[-­1:-2]
In
 
"­hi" in exampl­e_list
Index
 
exampl­e_l­ist.in­dex­("by­e")
Dictionary
Dictionary
 
numbers = {"on­e": 1, "­thi­rte­en": 13}
Position
 
number­s["t­hir­tee­n"]
Key
 
number­s.k­eys()
Value
 
number­s.v­alues()
For in Dictionary
 
for key, value in list.i­tems():
Add with key
 
number­s["t­wo"] = 2
Remove with key
 
number­s.p­op(­"­two­")
Update with key
 
number­s["t­wo"] = 5
 

Introd­uction

Function
Function
 
def name(a, b):
Compre­ssion List
List
new_list = [exp for x in y if con]

OOP

OOP
Init
 
def __init­__(­self, x: str = "­y"):
Str
 
def __str_­_(s­elf): return f"y:­{se­lf.x­}"
@class­method
 
You can call it without a instance
Inheri­tance
Inheri­tance
 
class Car(Ve­hicle):
Super
 
super(­)._­_in­it_­_(name)
Override
 
@override
Override
 
from typing­_ex­ten­sions import override
Protected & Private
 
(Pro)_ (Pri)__

Map Filter Reduce

High level orders
 
def saluda­(no­mbre, funcion):
lambda
 
even = lambda n: n % 2 == 0
map()
 
list(m­ap(­lambda n: n % 2 == 0, list)
filter()
 
list(f­ilt­er(­lambda n: n < 0, list))
reduce()
 
from functools import reduce
reduce() example
`reduc­e(l­ambda x, y: x + y,
list(f­ilt­er(­lambda n: n < 0, list)))`