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Two tiny clarifications.

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Guido van Rossum 2002-05-24 19:46:20 +00:00
parent 74d28aabb3
commit 78c759d636
1 changed files with 6 additions and 2 deletions
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8
pep-0008.txt
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@ -506,7 +506,8 @@ Programming Recommendations
'is' or 'is not'. Also, beware of writing "if x" when you 'is' or 'is not'. Also, beware of writing "if x" when you
really mean "if x is not None" -- e.g. when testing whether a really mean "if x is not None" -- e.g. when testing whether a
variable or argument that defaults to None was set to some other variable or argument that defaults to None was set to some other
value. value. The other value might be a value that's false in a
Boolean context!
- Class-based exceptions are always preferred over string-based - Class-based exceptions are always preferred over string-based
exceptions. Modules or packages should define their own exceptions. Modules or packages should define their own
@ -554,7 +555,10 @@ Programming Recommendations
reindent.py) will trim them. reindent.py) will trim them.
- Don't compare boolean values to True or False using == (bool - Don't compare boolean values to True or False using == (bool
types are new in Python 2.3). types are new in Python 2.3):
No: if greeting == True: print "Hello world"
Yes: if greeting: print "Hello world"
References References