symbols coad coach

Question

import string
import re

text = input()

alphanumeric_chars = string.ascii_letters + string.digits

for letters in text:
if letters not in alphanumeric_chars:
found_chars += letters

for char in found_chars:
text = text.replace(char, "")

new_text = ""
found_number = False #flag to track

for i in range(len(text)):
if i > 0 and (text[i].isupper() or (not found_number and text[i].isdigit())):
new_text += " " + text[i]
if text[i].isdigit():
found_number = True
else:
new_text += text[i]

print(new_text) # Output: hello World 123

It works on all but test case 3 and 4. Can anyone help me with this

Answer 1

✳️ you have to define found_chars first before using it in the for loop. You also don't need the bottom part of your code if you just include string.whitespace in alphanumeric_chars.

import string

text = input()

alphanumeric_chars = string.ascii_letters + string.digits + string.whitespace

found_chars = ""
for letters in text:
if letters not in alphanumeric_chars:
found_chars += letters

for char in found_chars:
text = text.replace(char, "")

print(text)

✳️ But your solution is still too complicated. You can simplify it to:

import string

text = input()

valid_chars = string.ascii_letters + string.digits + string.whitespace

result = ""

for letter in text:
if letter in valid_chars:
result += letter

print(result)

✳️ Or use isalnum() and isspace() to build your string. Then you don't have to import any module at all.

text = input()

result = ""

for letter in text:
if letter.isalnum() or letter.isspace():
result += letter

print(result)