Determining the number of parameters in a lambda

Question

I am wondering if there is a way to determine (given a variable containing a lambda) the number of parameters the lambda it contains. The reason being, I wish to call a functio

Answer 1

Lambdas are functions like any other. The argument count is stored in func.__code__.co_argcount.

>>> foo = lambda x, y=2: x+y
>>> foo.__code__.co_argcount
2
>>> foo = lambda x, y=2, z=3: x+y+z
>>> foo.__code__.co_argcount
3