Question: 
Write a function to replace all occurrences of spaces, commas, or dots with a colon.


Model's Code:
def replace_specialchar(text):
    return text.replace(' ', ':').replace(',', ':').replace('.', ':')



Sample Correct Code:
import re
def replace_specialchar(text):
 return (re.sub("[ ,.]", ":", text))


Asserts:
assert replace_specialchar('Python language, Programming language.')==('Python:language::Programming:language:')
assert replace_specialchar('a b c,d e f')==('a:b:c:d:e:f')
assert replace_specialchar('ram reshma,ram rahim')==('ram:reshma:ram:rahim')


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 732 of 974: 554/732 (75.68306010928961%): success