Python – Replace all numbers by K in given String
Given a string containing numbers, replace each number by K.
Input : test_str = ‘G4G is 4 all No. 1 Geeks’, K = ‘#’
Output : G#G is # all No. # Geeks
Explanation : All numbers replaced by K.Input : test_str = ‘G4G is 4 all No. Geeks’, K = ‘#’
Output : G#G is # all No. Geeks
Explanation : All numbers replaced by K.
Method #1 : Using replace() + isdigit()
In this, we check for numerics using isdigit() and replace() is used to perform the task of replacing the numbers by K.
Python3
# Python3 code to demonstrate working of # Replace numbers by K in String# Using replace() + isdigit() # initializing stringtest_str = 'G4G is 4 all No. 1 Geeks' # printing original stringprint("The original string is : " + str(test_str)) # initializing K K = '@' # loop for all charactersfor ele in test_str: if ele.isdigit(): test_str = test_str.replace(ele, K) # printing result print("The resultant string : " + str(test_str)) |
Output
The original string is : G4G is 4 all No. 1 Geeks The resultant string : G@G is @ all No. @ Geeks
Method #2 : Using regex() + sub()
In this, appropriate regex is used to identify digits and sub() is used to perform replace.
Python3
# Python3 code to demonstrate working of # Replace numbers by K in String# Using regex() + sub()import re # initializing stringtest_str = 'G4G is 4 all No. 1 Geeks' # printing original stringprint("The original string is : " + str(test_str)) # initializing K K = '@' # using regex expression to solve problem res = re.sub(r'\d', K, test_str) # printing result print("The resultant string : " + str(res)) |
Output
The original string is : G4G is 4 all No. 1 Geeks The resultant string : G@G is @ all No. @ Geeks
