python: printing, variables and data types

Today I learned some Python basics on how printing works, how variables works, and the different data types in python.

print()

• printing strings and variables that stored strings
• concatenating strings
• formatted strings
• escape sequence like \n, \t and raw strings to skip escape
• print numbers and result of expressions like add, sub, multiply, divide, power, etc
• printing lists and dicts
• separator and end arguments
• printing loops and range function
• string multiplication
• casting when combining strings and numbers
• use case of print() in debugging
• .format() method

variables

• naming rules: letters or underscore, case-sensitive, no reserved keywords
• assigning values, multiple assignments
• unpacking sequence
• dynamically assigning values
• constant variables: uppercase, not truly immutable

Data types

• numbers
• string
• boolean
• none
• List (mutable, ordered)
• Tuple (immutable, ordered)
• Dictionary (key-value pairs)
• Set (unordered, unique)
• Frozenset (immutable set)

print() has a lot more to it than just basic output (formatting, sep/end, debugging)