Using named arguments would lost the signature of the method

[Farrukhw]

See the last call where arguments are given value by their names while changing their positions

from multipledispatch import dispatch

@dispatch(int, int)
def add(x, y):
    return x + y

@dispatch(object, object)
def add(x, y):
    return "%s + %s" % (x, y)

@dispatch(object, object, object)
def add(y, x , z):
    return f"{x} and {y} now {z}"

print(add(3,4))
print(add('Me','You'))

#using named arguments
print(add(y='You', x='me'))

This would end up with the following errors:

 {
	"name": "NotImplementedError",
	"message": "Could not find signature for add: <>",
	"stack": "---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
File ~\\AppData\\Roaming\\Python\\Python311\\site-packages\\multipledispatch\\dispatcher.py:269, in Dispatcher.__call__(self, *args, **kwargs)
    268 try:
--> 269     func = self._cache[types]
    270 except KeyError:

KeyError: ()

During handling of the above exception, another exception occurred:

NotImplementedError                       Traceback (most recent call last)
Cell In[45], line 18
     16 print(add('Me','You'))
     17 #using named arguments
---> 18 print(add(y='You', x='me'))

File ~\\AppData\\Roaming\\Python\\Python311\\site-packages\\multipledispatch\\dispatcher.py:273, in Dispatcher.__call__(self, *args, **kwargs)
    271     func = self.dispatch(*types)
    272     if not func:
--> 273         raise NotImplementedError(
    274             \"Could not find signature for %s: <%s>\"
    275             % (self.name, str_signature(types))
    276         )
    277     self._cache[types] = func
    278 try:

NotImplementedError: Could not find signature for add: <>"
}