site = '123'
if "12" in site:
   print('site contains 12')


s = "This be a string"
if s.find("is") == -1:
  print "No 'is' here!"
else:
  print "Found 'is' in the string."

contains = 'abcde'.find('bcd') >= 0


contains = 'abcde'.count('bcd') > 0