I just got caught out by this:
"""
def foo():
pass
__all__ = [foo]
"""
Then at the interactive prompt:
>>> from foo import *
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: attribute name must be string
The problem is that __all__ contains a function object rather than a string
object. I had to use the debugger to determine why I was getting the
failure :( All you 2.1 veterans will immediately pick that it should read
'__all__ = ["foo"]'
Looking at the __all__ code:
if (skip_leading_underscores &&
PyString_Check(name) &&
PyString_AS_STRING(name)[0] == '_')
{
Py_DECREF(name);
continue;
}
value = PyObject_GetAttr(v, name);
PyObject_GetAttr explicitly handles string and unicode objects. However,
code here won't like Unicode that much :)
Would it make sense to a explicitly raise a more meaningful exception here
if __all__ doesnt contain strings?
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