Bugs item #1460340, was opened at 2006-03-29 00:05
Message generated for change (Comment added) made by gbrandl
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Category: Python Library
Group: Python 2.3
>Status: Closed
>Resolution: Invalid
Priority: 5
Submitted By: paul rubin (phr)
Assigned to: Nobody/Anonymous (nobody)
Summary: random.sample can raise KeyError
Initial Comment:
I have only tested this in 2.3 and the relevant code in
random.py has changed in the current svn branch, but
from inspection it looks to me like the bug may still
be there.
If you initialize a dictionary as follows:
a={}.fromkeys(range(10)+range(10,100,2)+range(100,110))
then
random.sample(a,3)
raises KeyError most times that you call it.
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>Comment By: Georg Brandl (gbrandl)
Date: 2006-03-29 09:11
Message:
Logged In: YES
user_id=849994
random.sample is documented to take a sequence as its first
argument. A dict is not a sequence type.
I think you want
random.sample(a.keys(), 3)
or, for large dicts,
random.sample(a.iterkeys(), 3)
----------------------------------------------------------------------
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