Question

How to apply a function to each element of a list in Python

Answer 1

def f(a):
    return 3 * a

lst = [1, 2, 3, 4, 5]
result = []

for n in lst:
    x = f(n)
    result.append(x)
    
print(result)

 
      
  
'''
run:
  
[3, 6, 9, 12, 15]

'''

 

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Answer 2

def f(a):
    return 3 * a

lst = [1, 2, 3, 4, 5]

i = 0
for n in lst:
    lst[i] = f(n)
    i = i + 1
    
print(lst)

 
      
  
'''
run:
  
[3, 6, 9, 12, 15]

'''

 

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Answer 3

def f(n):
    return 3 * n

lst = [1, 2, 3, 4, 5]

lst = list(map(f, lst))

print(lst)

 
      
  
'''
run:
  
[3, 6, 9, 12, 15]

'''

 

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Answer 4

def f(n):
    return 3 * n

lst = [1, 2, 3, 4, 5]

lst = [f(i) for i in lst]

print(lst)

 
      
  
'''
run:
  
[3, 6, 9, 12, 15]

'''

 

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