Replace substring with newline in Python regex

I am trying to use regex in Python to replace a substring

import re    
sample_string1 = "This is a sample. Another sample sentence"

print (re.sub("This is a sample", ' ', sample_string1))

Output:

. Another sample sentence

But if there is a new line in between the string I want to replace, it does not work:

sample_string2 = "This is a \n sample. Another sample sentence"
print (re.sub("This is a sample", ' ', sample_string2))

Output:

This is a 
 sample. Another sample sentence

Expected Output:

 . Another sample sentence

I am trying to replace the input string with white space even if there are multiple new line characters in between.

I am able to replace it iteratively, but any suggestions on the regex will be helpful.

>Solution :

Here is a solution that captures all new lines or whitespaces between your input string.

sample_string2 = "This\n       is a \n sample   \n   . Another sample sentence"
print (re.sub("This[\n\s]*is[\n\s]*a[\n\s]*sample[\n\s]*", ' ', sample_string2))

Prints: . Another sample sentence

• \n is new line
• \s is whitespace
• the asterisk (*) means 0 or more

All together: [\n\s]* means to capture 0 or more whitespaces or new lines

BE CAREFULL: This solution will apply only for this input string. It doesn’t work dynamically for other strings.