On 5/20/2010 4:02 AM, Floris Bruynooghe wrote:
TypeError: invoked as a method, echo() takes exactly 1 argument (0 given)
captures the semantics, but is perhaps too verbose.
How about:
TypeError: bound method echo() takes exactly 1 argument (0 given)
That way you can also have: "unbound method echo() ...". And it's as
semantically correct as the short "echo() takes ..."
Not having looked at the code I don't know how hard it is for the code
that raises this traceback to notice if it's a bound or unbound method
tough.
In 3.x, there are no unbound method objects, just functions. But that
should make the difference *easier* to detect, as bound/unbound method
objects were actually the same class, differing only in an attribute.
I notice
>>> list.append()
Traceback (most recent call last):
File "<pyshell#0>", line 1, in <module>
list.append()
TypeError: descriptor 'append' of 'list' object needs an argument
So here the message is specific to the type of the callable.
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