args in python

1# if args is not passed it return message
2# "Hey you didn't pass the arguements"
3
4def ech(nums,*args):
5    if args:
6        return [i ** nums for i in args]  # list comprehension
7    else:
8        return "Hey you didn't pass args"
9    
10print(ech(3,4,3,2,1))

1def func(*args):
2    x = []          # emplty list
3    for i in args:
4        i = i * 2
5        x.append(i)  
6        y = tuple(x) # converting back list into tuple
7    return y
8        
9tpl = (2,3,4,5)        
10print(func(*tpl))

1# if args is not passed it return message
2# "Hey you didn't pass the arguements"
3
4def ech(num,*args):  
5    if args:
6        a = []
7        for i in args:
8            a.append(i**num)
9        return a                 # return should be outside loop
10    else:
11        return "Hey you didn't pass the arguements"     # return should be outside loop
12    
13print(ech(3))

1# normal parameters with *args
2
3def mul(a,b,*args): # a,b are normal paremeters
4    multiply = 1
5    for i in args:
6        multiply *= i
7        
8    return multiply
9
10print(mul(3,5,6,7,8))   # 3 and 5 are being passed as a argument but 6,7,8 are args 

1def display(a,b,c):
2    print("arg1:", a)
3    print("arg2:", b)
4    print("arg3:", c)
5
6lst = [2,3]
7display(1,*lst)

1def wrap(*args):
2        lis = list(args)  # it is important to convert args into list before looping, args take tuple as a argument 
3        for i in range(len(lis)):
4            lis[i] = lis[i] * 2
5        args = tuple(lis)
6        return args
7print(wrap(2,3,4,5,6))

1def func2(*args):
2    for i in args:
3        print(i * 2)
4        
5func2(2,3,4,5)

1def mul(*args):  # args as argument
2    multiply = 1
3    for i in args:
4        multiply *= i
5        
6    return multiply
7
8lst = [4,4,4,4]
9tpl = (4,4,4,4)    
10
11print(mul(*lst))  # list unpacking
12print(mul(*tpl)) # tuple unpacking

1# if option is not passed it still returns 20
2# if option = True or option = 1 is passed it returns 20 which is sum of numbers
3# if option = False or option = 0 is passed it returns 0 
4
5def addition(a, b, *args, option=True):
6   result = 0
7   if option:
8      for i in args:
9      result += i
10      return a + b + result
11   else:
12      return result

1def add(*args):
2    total = 0
3    for i in args:
4        total += i
5    
6    return total
7
8print(add(5,5,10))