So here's a two-part proposal that would solve Zaheri's problem:
1) Enhance AttributeError to include arguments for the parts in quotes, for i18n independence. 2) Provide, in the docs, a hasattr replacement that checks the exception's args.
The new hasattr would look like this:
def hasattr(obj, name): try: getattr(obj, name) return True except AttributeError as e: if e.args[1] == obj.__class__.__name__ and e.args[2] == name: return False raise
Since it's just a recipe in the docs, you could also have a version that works on current Pythons, but it'd need to do string manipulation to compare - something like:
def hasattr(obj, name): try: getattr(obj, name) return True except AttributeError as e: if e.args[0] == "%r object has no attribute %r" % ( obj.__class__.__name__, name): return False raise
I can't guarantee that this doesn't get some edge cases wrong, eg if you have weird characters in your name. But it'll deal with the normal cases, and it doesn't need any language changes - just paste that at the top of your file.
Zaheri, would this solve your problem?
This looks like a good idea. Note that there is also getattr(X(), 'y', 'default') that would have to behave like this. Cheers, Zahari
ChrisA _______________________________________________ Python-ideas mailing list Python...@python.org <javascript:> https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/