python pass function as argument with parameters code example

Example 1: pass function python

# "pass" is a function that basically does nothing.
# it can be used to ignore an error in a try block.

i = input("Please enter any character")
try:
  int(i)
except ValueError:
  pass

# it can also be used if you plan to implement certain code later

def attack():
  #implement actual attack code later
  pass

# a substitute for pass is to print nothing
print()

Example 2: python function arguments

#*args and **kwargs are normally used as arguments when calling the function.

#*args returns as tuple and **kwargs returns as dictionary.

#*args and **kwargs  let you write functions with variable number of arguments in python.

def func(required,*args,**kwargs):
    return f"{required} {args} {kwargs}"
  
func("Nagendra",5,32,2,1,23,) #output == 'Nagendra (5, 32, 2, 1, 23) {}'
func("Nagendra",5,32,2,1,23,key1="55",key2="75") #output == "Nagendra (5, 32, 2, 1, 23) {'key1': '55', 'key2': '75'}"

#Very understable example of args.
#Given n number of arguments in a function calculate its average
def average(*args):
  '''
  As we already know *args means collection of values in a tuple.
  INPUT: arguments are given. example average(4,10,) 
  OUTPUT: average of two numbers (4+10)/2 == 14
  '''
  return sum(args)/len(args)

average(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15) #output == 8.0

Example 3: send function as parameter python

l = [1,2,3,4,5]
#already change the var

def chng(f,val):
    f(val)
chng(l.append,8)
chng(l.remove,4)


def chng2(f,lis,val):
     f(lis,val)
    
chng(list.append,l,8)
chng(list.remove,l,4)

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