Lesson: Python Fundamentals

PYTHON_FUNDAMENTALS.md

Python Fundamentals

Learning Objectives

Built-in Types

Falsy Values

• None
• False
• Zero of any numeric type (0, 0.0)
• Empty strings - ''
• Empty sequences - [], ()
• Empty mapping - {}

Boolean Operations

• x and y
• x or y
• not x

Comparison Operators

Operator	Meaning
<	strictly less than
<=	less than or equal
>	strictly greater than
>=	greater than or equal
==	equal
!=	not equal
is	object identity
is not	negated object identity

Numeric Types

• int
  • 32 bits of precision
• float
  • Numeric literals with a decimal point
• long
  • Integers have unlimited precision
  • Suffixed with L or l, use L to avoid confusion with the number 1
• complex
  • Suffixed with J or j

Strings

• Enclosed in either single or double quotes
• Can be prefaced with u for unicode strings (u'abc', u"def")
• Splicing
• len()

Lists

• Enclosed in square brackets
• [a, b, c]

Tuples

• Optionally enclosed in parentheses
• a, b, c or (a, b, c)
• Empty tuples must have parentheses ()
• A single tuple value must have a trailing comma (a,)

Dictionaries

Looping

Resources

• https://docs.python.org/2.7/library/stdtypes.html