cheatsheet.md

Basics:

Declaring a variable

x = 14

If Statement:

  if condition1:
    action1()
  elif condition2:
    action2()
  else:
    action3()

For Loop

for i in range(10):
  print(i)

While Loop

while x < 10:
  print(x)

Comment

# This is a comment

Arithmetic

Action	Code
Increment x by 1	x += 1
Decrement x by 1	x -= 1

Lists:

Action	Code
Create an empty list	names = []
Create a list	names = ['Martha', 'Erin', 'Rupert']
Find the length of a list	len(names)
Get the 1st item (index 0)	names[0]
Get the 2nd item (index 1)	names[1]
Get the last item	names[-1]
Get the first x items	names[:x]
Get the last x items	names[-x:]
Get the 2nd and 3rd	names[1:3]
To reverse items on a list	names[::-1]
Looping through a list	for name in names:
Adding items to a list	names.append('other')
Combining lists	names + ['other', 'other']
Repeat a list	names * 2
Filter a list	[name for name in names if name[0] == 't']

Strings:

A string is a series of characters. For example: The string "Hello" must be put in quote marks "" or single quotes ''. A string can be treated as a list of letters. All commands in the list section above work e.g.

Action	Code
Length of string	len("Hello, World")
Define a string to be a variable	word = "Hello"
1st letter	word[0]
Replace l with p (case sensitive)	word.replace('l', 'p')
Split into list of words	word_description.split(' ')

Functions:

Action	Code
declare a function	def example(word):
call a function	example('hello')