def takes_one_arg(callee, attr=None, argname=None):
ismethod = False
if attr is None:
attr = '__call__'
if inspect.isroutine(callee):
fn = callee
elif inspect.isclass(callee):
try:
fn = callee.__init__
except AttributeError:
return False
ismethod = hasattr(fn, '__call__')
else:
try:
fn = getattr(callee, attr)
except AttributeError:
return False
try:
argspec = getargspec(fn)
except TypeError:
return False
args = argspec[0]
if hasattr(fn, im_func) or ismethod:
# it's an instance method (or unbound method on py2)
if not args:
return False
args = args[1:]
if not args:
return False
if len(args) == 1:
return True
if argname:
defaults = argspec[3]
if defaults is None:
defaults = ()
if args[0] == argname:
if len(args) - len(defaults) == 1:
return True
return False
def takes_one_arg(callee, attr=None, argname=None):
ismethod = False
if attr is None:
attr = '__call__'
if inspect.isroutine(callee):
fn = callee
elif inspect.isclass(callee):
try:
fn = callee.__init__
except AttributeError:
return False
ismethod = hasattr(fn, '__call__')
else:
try:
fn = getattr(callee, attr)
except AttributeError:
return False
try:
argspec = getargspec(fn)
except TypeError:
return False
args = argspec[0]
if hasattr(fn, im_func) or ismethod:
# it's an instance method (or unbound method on py2)
if not args:
return False
args = args[1:]
if not args:
return False
if len(args) == 1:
return True
if argname:
defaults = argspec[3]
if defaults is None:
defaults = ()
if args[0] == argname:
if len(args) - len(defaults) == 1:
return True
return False