Title Center for Coastal and Ocean Mapping NOAA/UNH Joint Hydrographic Center 31-Oct-2006 A Python Tutorial Kurt Schwehr 31 Oct 2006

Where is python on my machine?

Fink for unix software

Fink Commander

Emacs Cheat Sheet

Setting up ~/.emacs

Getting started

Strings

Getting help with the ‘tab’ key

More string operations

Lists are created with [ ]

The math module

Getting help on functions

More help

from math import *

The Decimal module

Converting between strings and numbers

If tests and indentation matters

for loops

Reading a file Adding a comma prevents the extra new line

Reading numbers from a file

A quick intro to time

Getting to the web documentation

Writing data to a file

Old school - gnuplot

Gnuplot in 3D

Saving gnuplot to gif or pdf

Writing a python file (aka module) env finds python in your path chmod +x dump.py./dump.py

Handling programs in a better way __name__ is set to main if the file is being executed

Making our code a proper function

Function parameters can be specified by name

Use this function from outside the file Whoops - no documentation!

Often it is good to give a parameter a default

Add some ‘doc strings’

Documentation as seen from ipython

Epydoc is Kurt’s favorite way to document python code Epydoc imports your file and creates html documentation

Here is the initial edydoc page Nice, but could be better Use markups in the doc string to tell epydoc more

Adding more to the file

Document the function