Ok, thanks for the input (especially for the trace function ! That's
something I was always missing :-)
Here is my current solution: I defined a wrapper function which is
called instead of the real function and that wrapper prints a meaningful
error:
def wrapper (*args, **kw):
'''Small helper to find the cause of spurious TypeErrors (expected X
arguments, got Y without trace).'''
# wrapper() itself must not expect any arguments because that could
# again cause TypeErrors.
if len (args) == 0:
raise 'wrapper called without arguments'
else:
try:
apply (args[0], args[1:], kw)
except TypeError, e:
import types
if type (args[0]) == types.FunctionType:
code = args[0].func_code
f = "%s %s:%d" % (
args[0].__name__,
code.co_filename,
code.co_firstlineno,
)
else:
f = str (args[0])
print f, args[1:], kw
raise 'Error calling %s(%s,%s): %s' % (
f, args[1:], kw, str (e),
)
except:
print args, kw
raise
The check above probable needs some extension when methods should be called
but I'm too lazy right now to implement all possible callables (and I
believe the release-early-release-often idea of OS :-)
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Aaron "Optimizer" Digulla, [EMAIL PROTECTED]
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