[ python-Bugs-877675 ] Dictionary comprehension

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Bugs item #877675, was opened at 2004-01-15 11:57
Message generated for change (Comment added) made by bwarsaw
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Category: Python Interpreter Core
Group: Feature Request
Status: Open
Resolution: None
Priority: 5
Submitted By: James Bond (james_007_bond)
Assigned to: Nobody/Anonymous (nobody)
Summary: Dictionary comprehension

Initial Comment:
Would it be possible to extend the list comprehension to 
dictionaries ? 

I found myself typing a line of the form:

dict = { x: x**2 for x in range(10) }

which seems pretty clear to me... But the interpreter is 
telling me it's not supported! Damn! I had to go through 
creating a list instead, and then use it to create my 
dictionary. 

dict = dict([(x, x**2) for x in range(10)])

By extending the dictionary syntax it seems the intermediate 
list creation could be avoided, and my proposed code looks 
clearer to me.

[using Python 2.3.3, on MacOS X 10.3.2]


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>Comment By: Barry A. Warsaw (bwarsaw)
Date: 2004-01-15 12:29

Message:
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See PEP 274

http://www.python.org/peps/pep-0274.html

I like the idea too, but it doesn't seem to have gained
widespread support yet.


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