import re
def testsearchandmatch():
  s1="helloworld, i am 30 !"
  
  w1 = "world"
  m1 =  re.search(w1, s1)
  if m1:
    print("find : %s" % m1.group())
    
  if re.match(w1, s1) == none:
    print("cannot match")
    
  w2 = "helloworld"
  m2 = re.match(w2, s1)
  if m2:
    print("match : %s" % m2.group())
testsearchandmatch()
#find : world
#cannot match
#match : helloworld
#//python/8474