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Updated style with more explicit examples of truth checking #105

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Updated style with more explicit examples of truth checking #105

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Updated value checking in style guide with more explicit example for …
leetrout Mar 25, 2012
e9339cc
Corrected atter typo in style.
leetrout Mar 25, 2012
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10 changes: 8 additions & 2 deletions docs/writing/style.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -142,7 +142,9 @@ Check if variable equals a constant
-----------------------------------

You don't need to explicitly compare a value to True, or None, or 0 - you can
just add it to the if statement.
just add it to the if statement. See `Truth Value Testing
<http://docs.python.org/library/stdtypes.html#truth-value-testing>`_ for a
list of what is considered false.

**Bad**:

Expand All @@ -160,10 +162,14 @@ just add it to the if statement.

# Just check the value
if attr:
print 'True!'
print 'attr is truthy!'

# or check for the opposite
if not attr:
print 'attr is falsey!'

# or, since None is considered false, explicity check for it
if attr is None:
print 'attr is None!'

Access a Dictionary Element
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