[Pulp-list] Interesting python inspection

[Jason Dobies]

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On 08/19/2010 12:55 PM, Jason Rist wrote:
> On 08/19/2010 10:28 AM, Jason Dobies wrote:
>> PyCharm just flagged the following code with a warning (in particular
>> the consumerids argument)
>>
>> def create(self, id, description, consumerids=[]):
>>
>> Here's the warning:
>>
>> "This inspection detects when a mutable value as list or dictionary is
>> detected in a default value for an argument. Default argument values are
>> evaluated only once at function definition time, which means that
>> modifying the default value of the argument will affect all subsequent
>> calls of the function. "
>>
>> That's kinda cool, I never saw anything like that before.
>>
> It knows...
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Something else I keep seeing in the code is:

if foo == None:

It's better to just use object reference comparison rather than equality
when checking for none:

if foo is None:


- -- 
Jason Dobies
RHCE# 805008743336126
Freenode: jdob
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