old_contents: #/usr/bin/python
  import re
  
  #Shows how to test if a string matches a regular expression (yes/no) and uses more than one modifier
  expression = re.compile(r"^\w+.+string", re.I | re.S)	#compile the expression
  if expression.match("A Simple String To Test"):		#See if a string matches it
  	print "Matched"
  else:
  	print "Did Not Match"
  
  #Splitting with a regular expression
  scalar_list = "item 1,     item 2, item 3"	#A text string delimitted by comma and variable whitespace
  items = re.split(",\s+", scalar_list) 		#Splitting this up into an array called items
  print items[1] + ":" + items[0]				#printing a couple of the elements
  
  #Extraction/parsing
  parse_this = "Text with some digits: 1234 and some hexidecimal deadbeef1337"
  extractions = re.compile(r"[^\d]+(\d+).+\s([0-9a-f]+)$")		#Our regex; groups we want in ()'s
  peices = extractions.match(parse_this)							#exec our re and result in peices
  print "Number: " + peices.group(1) + " Hex:" + peices.group(2)	#display both extracted groups
  
  wrong_name = "Mark decided to write in the hypertext markup language";	#our string
  replacement = re.sub(r'mark', 'Greg', wrong_name, flags=re.IGNORECASE)	#changing all instances of "Mark" with "Greg" with no case-sensitivity
  print replacement	#lulz at hypertext gregup language
  
new_contents: #/usr/bin/python
  import re
  
  #Shows how to test if a string matches a regular expression (yes/no) and uses more than one modifier
  expression = re.compile(r"^\w+.+string", re.I | re.S)	#compile the expression
  if expression.match("A Simple String To Test"):		#See if a string matches it
  	print "Matched"
  else:
  	print "Did Not Match"
  
  #Splitting with a regular expression
  scalar_list = "item 1,     item 2, item 3"	#A text string delimitted by comma and variable whitespace
  items = re.split(",\s+", scalar_list) 		#Splitting this up into an array called items
  print items[1] + ":" + items[0]				#printing a couple of the elements
  
  #Extraction/parsing
  parse_this = "Text with some digits: 1234 and some hexidecimal deadbeef1337"
  extractions = re.compile(r"[^\d]+(\d+).+\s([0-9a-f]+)$")		#Our regex; groups we want in ()'s
  peices = extractions.match(parse_this)							#exec our re and result in peices
  print "Number: " + peices.group(1) + " Hex:" + peices.group(2)	#display both extracted groups
  
  #Find and Replace with regex
  wrong_name = "Mark decided to write in the hypertext markup language";	#our string
  replacement = re.sub(r'mark', 'Greg', wrong_name, flags=re.IGNORECASE)	#changing all instances of "Mark" with "Greg" with no case-sensitivity
  print replacement	#lulz at hypertext gregup language
  
subject: Update re.py