Program Sample

PEP 8 : Style Guide for Python Code [www.python.org/...]

Open IDLE in an empty Edit Window.
Type in the following code. Omit the explanation text ### ... on the right.
IDLE will provide the colour coding automatically.
It will also indent after a : (colon).

# Sample                      ### A comment starts from a #

def sample():                 ### def defines a function, here named sample.
    print 'Hello'             ### This is what the function does.

if __name__ == '__main__':    ### There are two underscores before and after each word.
    sample()                  ### This calls the function and so prints 'Hello'.

Running the code produces this output:

Hello