Python Cheat Sheet

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word number: 1257

Time: 2022-11-27 04:30:59 +0000

Why cheatsheet for programming languages?

Table Of Contents

Frequently Used In Any Programming

Print

print("Hello, World!")

Comments

# This is a comment.

Variables

x = 1
y = 2
print(x, y)

Data Types

x = 1 #integer
y = 2.5 #float
z = "My numbers are:" #string 
print(z, x, "and", y)

Operators

x = 5
y = 2.5

z = x + y #addition
print("x + y =", z)

z = x - y #substraction
print("x - y =", z)

z = x * y #multiplication
print("x * y =", z)

z = x / y #division
print("x / y =", z)

z = x % y #mod
print("x % y =", z)

Input

print('Enter your name:')
x = input()
print('Hello, ' + x)

Boolean

x = 1;
y = 2;
z = "hello"

# more than?
v = x > y
print(x, ">", y, ":", v)

# less than?
v = x < y
print(x, "<", y, ":", v)

# equal?
print("hello =", z, ":", ("hello" == z))

Conditional

grade = 75

if grade > 60:
  print("pass")

if grade < 60:
  print("fail")
else:
  print("pass")

if grade <= 0:
  print("F")
elif grade <= 20:
  print("E")
elif grade <= 40:
  print("D")
elif grade <= 60:
  print("C")
elif grade <= 80:
  print("B")
elif grade <= 100:
  print("A")
else:
  print("Not a Number")

Loop

for x in [0, 1, 2, 5, 8]:
  print("interation:", x)

for x in range(0, 4):
  print(x)

for x in range(0, 4):
  print("hello")

y = 1
z = 0

# Find y + y + y + y!

for x in range(0, 4):
  z += y
	
print(z)

List (Array)

colors = ["black", "white", "red", "green", "blue"]

print(colors[0])
print(colors[2])
print(colors[4])
print(len(colors))

for x in range(0, len(colors)):
  print(colors[x])

Dictionaries (objects)

profile = {
  "Name": "Fajar Purnama",
  "Age": 30,
  "Nationality": "Indonesian",
  "Occupation": "Lecturer"
}

print(profile)

print(profile["Name"])
print(profile["Nationality"])

for x in profile:
  print(x, ":", profile[x])

Show available built in functions

dir(__builtins__)

Show description of a function

help("print")

Show available modules

help('modules')

List functions available in a module

dir("pandas")

Install modules

!pip install pydataset

Exercises

References