python re whitespace code example
Example 1: python remove whitespace from start of string
' hello world! '.strip()
'hello world!'
' hello world! '.lstrip()
'hello world! '
' hello world! '.rstrip()
' hello world!'
Example 2: re python3
import re
>>> m = re.search('(?<=abc)def', 'abcdef')
>>> m.group(0)
'def'
Example 3: python re.search()
## Search for pattern 'bb' in string 'aabbcc'.
## All of the pattern must match, but it may appear anywhere.
## On success, match.group() is matched text.
match = re.search(r'bb', 'aabbcc') # found, match.group() == "bb"
match = re.search(r'cd', 'aabbcc') # not found, match == None
## . = any char but \n
match = re.search(r'...c', 'aabbcc') # found, match.group() == "abbc"
## \d = digit char, \w = word char
match = re.search(r'\d\d\d', 'p123g') # found, match.group() == "123"
match = re.search(r'\w\w\w', '@@abcd!!') # found, match.group() == "abc"
Example 4: python strip whitespace
s1 = ' abc '
print(f'String =\'{s1}\'')
print(f'After Removing Leading Whitespaces String =\'{s1.lstrip()}\'')
print(f'After Removing Trailing Whitespaces String =\'{s1.rstrip()}\'')
print(f'After Trimming Whitespaces String =\'{s1.strip()}\'')