Peter Hansen wrote:
> Guy Robinson wrote:
>
>> I have a directory of python scripts that all (should) contain a
>> number of attributes and methods of the same name.
>>
>> I need to import each module, test for these items and unload the
>> module. I have 2 questions.
[snip]
>> 2.. how do I test for the existance of a method in a module without
>> running it?
What the OP is calling a 'method' is more usually called a 'function'
when it is defined at module level rather than class level.
>
>
> The object bound to the name used in the import statement is, well, an
> object, so you can use the usual tests:
>
> import mymodule
> try:
> mymodule.myfunction
> except AttributeError:
> print 'myfunction does not exist'
>
> or use getattr(), or some of the introspection features available in the
> "inspect" module.
>
Ummm ... doesn't appear to scale well for multiple modules and multiple
attributes & functions. Try something like this (mostly tested):
modules = ['foomod', 'barmod', 'brentstr', 'zotmod']
attrs = ['att1', 'att2', 'att3', 'MyString']
funcs = ['fun1', 'fun2', 'fun3']
# the above could even be read from file(s)
for modname in modules:
try:
mod = __import__(modname)
except ImportError:
print "module", modname, "not found"
continue
for attrname in attrs:
try:
attr = getattr(mod, attrname)
except AttributeError:
print "module %s has no attribute named %s" % \
(modname, attrname)
continue
# check that attr is NOT a function (maybe)
for funcname in funcs:
pass
# similar to above but check that it IS a function
BTW, question for the OP: what on earth is the use-case for this? Bulk
checking of scripts written by students?
Cheers,
John
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