How to find the number of arguments in a Python function?
In this article, we are going to see how to count the number of arguments of a function in Python. We will use the special syntax called *args that is used in the function definition of python. Syntax *args allow us to pass a variable number of arguments to a function. We will use len() function or method in *args in order to count the number of arguments of the function in python.
Example 1:
Python3
def no_of_argu( * args): # using len() method in args to count return ( len (args)) a = 1 b = 3 # agruments passed n = no_of_argu( 1 , 2 , 4 , a) # result printed print ( " The number of arguments are: " , n) |
Output :
The number of arguments passed are: 4
Example 2:
Python3
def no_of_argu( * args): # using len() method in args to count return ( len (args)) print (no_of_argu( 2 , 5 , 4 )) print (no_of_argu( 4 , 5 , 6 , 5 , 4 , 4 )) print (no_of_argu( 3 , 2 , 32 , 4 , 4 , 52 , 1 )) print (no_of_argu( 1 )) |
Output :
3 6 7 1
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