Python

References

• Python Tutorial
• M.I.T. Open Courseware
• How to Think Like a Computer Scientist: Learning with Python (PDF)
• Built-in Functions
• Built-in Types

Installation

• sudo apt-get install python
• sudo apt-get install idle

Files

• /usr/bin/python - symbolic link to /usr/bin/python2.7
• /usr/bin/python-config - symbolic link to /usr/bin/python2.7-config
• /usr/lib/python* - directories containing the standard modules
• /usr/include/python* - directories containing the include files

Environment Variables (See man page for details)

• PYTHONHOME
• PYTHONPATH
• PYTHONSTARTUP
• PYTHON2K
• PYTHONOPTIMIZE
• PYTHONDEBUG
• PYTHONDONTWRITEBYTECODE
• PYTHONINSPECT
• PYTHONIOENCODING
• PYTHONNOUSERSITE
• PYTHONUNBUFFERED
• PYTHONVERBOSE
• PYTHONWARNINGS

Tidbits

• Statement grouping is done by indentation instead of beginning and ending brackets
• No variable or argument declarations are necessary
• In python, associative arrays are called Dictionaries

Starting The Interpreter

idle - start the IDE

python - start in interactive mode

python -c command [arg] ... (best to quote command) - Execute command with args

python filename - execute script in filename

python -i filename - go interactive after filename terminates

filename - Using she-bang notation, execute script in filename

python -m module [arg] - execute the source file for module

Semantics

Syntax

• a = b = c = 0 - Assign a value to multiple variables
• a, b = 0, 1 - Multiple assignment
• I/O
• Math
• Keywords

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	First created Aug 2, 2011 ~ Last revised February 15, 2012