Python Basics Cheat Sheet

A Programming › Python cheat sheet in English by sachua

Python

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Python IDLE Shell

1. Press the Windows Key
2. Type "Python IDLE"

How to create a new Python file

1. In the Python Shell, click File Tab
2. Click New File

Print Statements

print("Hello")
Hello
print(4+5)
9

Function Definition

def name (arg1, arg2, ...):
statements
return expr

Boolean Operators

x is y

x not y

x and y

x or y

List Operations

list.append(a)	Append a to list
list.insert(i, a)	Insert a before ith item in list
list.sort()	Sort list
list.pop(i)	Remove i th item in list

Data Types

Integer	-256, 15
String	"Hello", "apple"
Boolean	True, False
List	[ value, ... ]
Tuple	( value, ... )

Conversion Functions

int(expr) Converts expr to integer

str(expr) Converts expr to string

Arithmetic Operators

x + y	add	x - y	subtract
x * y	multiply	x / y	divide
x % y	modulus	x ** y	x^y

Comparators

x < y	Less
x <= y	Less or equal
x > y	Greater
x >= y	Greater or equal
x == y	Equal
x != y	Not equal

String / List / Tuple Operations

len(s)	length of s
s[i]	ith item in s (starts from 0)
s[start : end : step ]	slice s from start (included) to end (excluded) with increment step
s + t	concatenate s with t

Statements

If Statement
if expr :
statements
elif expr :
statements
else:
statements

While Loop
while expr :
statements

For Loop
for var in collection :
statements

Counting For Loop
for i in range(start, end, step):
statements

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