[Tutor] Remove a dictionary entry
bob gailer
bgailer at gmail.com
Sat Sep 18 03:36:17 CEST 2010
On 9/17/2010 9:21 PM, M. 427 wrote:
> Thank you,
> After reading the following documentations
> http://docs.python.org/tutorial/datastructures.html#looping-techniques
> http://docs.python.org/tutorial/controlflow.html#for-statements
> I ended up with this :
>
> Version 3 :
> for i,row in d[:].iteritems() : # BUG : TypeError: unhashable type
> if len(row)< 2 :
> del d[i]
>
> Still buggy... Any lead for this error message? Is a slice unhashable?
> Am I looking in the right direction for this task?
Where did you see [:] after a dict? [:] is slicing, and applies to a
sequence not a mapping.
Also note the warning "Using iteritems() while adding or deleting
entries in the dictionary may raise a RuntimeError or fail to iterate
over all entries."
You should get a list rather than an iterator of all key-value pairs
then iterate over that list.
--
Bob Gailer
919-636-4239
Chapel Hill NC
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