replace string python regex code example

Example 1: python replace regex

import re
s = "Example String"
replaced = re.sub('[ES]', 'a', s)
print replaced 
# will print 'axample atring'

Example 2: python regex substitute

import re
s = "Example String"
replaced = re.sub('[ES]', 'a', s)
print replaced

Example 3: python replace string

# string.replace(old, new, count),  no import is necessary
text = "Apples taste Good."
print(text.replace('Apples', 'Bananas'))          # use .replace() on a variable
Bananas taste Good.          <---- Output

print("Have a Bad Day!".replace("Bad","Good"))    # Use .replace() on a string
Have a Good Day!             <----- Output

print("Mom is happy!".replace("Mom","Dad").replace("happy","angry"))  #Use many times
Dad is angry!                <----- Output

Example 4: python named group regex example

>>> re.search(r'(?P<name>[^-]+)-(?P<ver>\d.\d.\d-\d+).tar.gz', 'package_name-1.2.3-2004.tar.gz').groupdict()
{'name': 'package_name', 'ver': '1.2.3-2004'}

Example 5: str replace python regex

import re
line = re.sub(r"</?\[\d+>", "", line)

# Comented version
line = re.sub(r"""
  (?x) # Use free-spacing mode.
  <    # Match a literal '<'
  /?   # Optionally match a '/'
  \[   # Match a literal '['
  \d+  # Match one or more digits
  >    # Match a literal '>'
  """, "", line)