[Python-Dev] Updated PEP 362 (Function Signature Object) (original) (raw)

Michael Foord fuzzyman at voidspace.org.uk
Thu Jun 7 15:28:08 CEST 2012

On 6 Jun 2012, at 18:28, Yury Selivanov wrote:

On 2012-06-06, at 1:13 PM, Alexandre Zani wrote:

A question regarding the name. I have often seen the following pattern in decorators:

def decor(f): def somefunc(a,b): dostuff using f somefunc.name = f.name return somefunc What are the name and fully qualified names in the signature for the returned function? somefunc.name or f.name? Never copy attributes by hand, always use 'functools.wraps'. It copies 'name', 'qualname', and bunch of other attributes to the decorator object. We'll probably extend it to copy signature too; then 'signature(decor(f))' will be the same as 'signature(f)'.

I don't think functools.wraps can copy the signature by default - it's not uncommon to have decorators that modify signatures. A new parameter to functools.wraps defaulting to False?

Michael

- Yury

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