Basic cheatsheet for Python.

Based on the book writted by Al Sweigart, Automate the Boring Stuff with Python under the Creative Commons license.

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• Python Basics
  • Math Operators
  • Data Types
  • String Concatenation and Replication
  • Variables
  • Comments
  • The print() Function
  • The input() Function
  • The len() Function
  • The str(), int(), and float() Functions
• Flow Control
  • Comparison Operators
  • Boolean Operators
  • Mixing Boolean and Comparison Operators
  • if Statements
  • else Statements
  • elif Statements
  • while Loop Statements
  • break Statements
  • continue Statements
  • for Loops and the range() Function
  • Importing Modules
  • Ending a Program Early with sys.exit()
• Functions
  • Return Values and return Statements
  • The None Value
  • Keyword Arguments and print()
  • Local and Global Scope
  • The global Statement
• Exception Handling
• Lists
  • Getting Individual Values in a List with Indexes
  • Negative Indexes
  • Getting Sublists with Slices
  • Getting a List’s Length with len()
  • Changing Values in a List with Indexes
  • List Concatenation and List Replication
  • Removing Values from Lists with del Statements
  • Using for Loops with Lists
  • The in and not in Operators
  • The Multiple Assignment Trick
  • Augmented Assignment Operators
  • Finding a Value in a List with the index() Method
  • Adding Values to Lists with the append() and insert() Methods
  • Removing Values from Lists with remove()
  • Sorting the Values in a List with the sort() Method
  • Tuple Data Type
  • Converting Types with the list() and tuple() Functions
• Dictionaries and Structuring Data
  • The keys(), values(), and items() Methods
  • Checking Whether a Key or Value Exists in a Dictionary
  • The get() Method
  • The setdefault() Method
  • Pretty Printing
• Manipulating Strings
  • Escape Characters
  • Raw Strings
  • Multiline Strings with Triple Quotes
  • Indexing and Slicing Strings
  • The in and not in Operators with Strings
  • The upper(), lower(), isupper(), and islower() String Methods
  • The isX String Methods
  • The startswith() and endswith() String Methods
  • The join() and split() String Methods
  • Justifying Text with rjust(), ljust(), and center()
  • Removing Whitespace with strip(), rstrip(), and lstrip()
  • Copying and Pasting Strings with the pyperclip Module
• Regular Expressions
  • Matching Regex Objects
  • Grouping with Parentheses
  • Matching Multiple Groups with the Pipe
  • Optional Matching with the Question Mark
  • Matching Zero or More with the Star
  • Matching One or More with the Plus
  • Matching Specific Repetitions with Curly Brackets
  • Greedy and Nongreedy Matching
  • The findall() Method
  • Making Your Own Character Classes
  • The Caret and Dollar Sign Characters
  • The Wildcard Character
  • Matching Everything with Dot-Star
  • Matching Newlines with the Dot Character
  • Review of Regex Symbols
  • Case-Insensitive Matching
  • Substituting Strings with the sub() Method
  • Managing Complex Regexes
• Reading and Writing Files
  • Backslash on Windows and Forward Slash on OS X and Linux
  • The Current Working Directory
  • Absolute vs. Relative Paths
  • Creating New Folders with os.makedirs()
  • Handling Absolute and Relative Paths
  • Finding File Sizes and Folder Contents
  • Checking Path Validity
  • The File Reading/Writing Process
  • Opening Files with the open() Function
  • Reading the Contents of Files
  • Writing to Files
  • Saving Variables with the shelve Module
  • Saving Variables with the pprint.pformat() Function
  • Copying Files and Folders
  • Moving and Renaming Files and Folders
  • Permanently Deleting Files and Folders
  • Safe Deletes with the send2trash Module
  • Walking a Directory Tree
  • Reading ZIP Files
  • Extracting from ZIP Files
  • Creating and Adding to ZIP Files