[Python-Dev] Very Strange Argument Handling Behavior (original) (raw)

Michael Foord fuzzyman at voidspace.org.uk
Sat Apr 17 02:53:58 CEST 2010

On 17/04/2010 02:43, Greg Ewing wrote:

Daniel Stutzbach wrote:

Unless you're saying you often create a dictionary, add non-string keys, remove the non-string keys, then pass it as a **kwds? ;-) I think the point is that it would create a very mysterious potential failure mode. What would you make of a situation where Python says "TypeError: Keyword dict contains non-string keys", but upon examination, the dict clearly does not contain any such thing? No, if the dictionary is not marked as an all-string dict it can fallback to checking. The common case (dict marked as all strings) is fast.

Michael

-- http://www.ironpythoninaction.com/

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