Python字符串长度递归

def recursiveLength(theString):
    if theString == \'\': return 0
    return 1 + recursiveLength(theString[1:])

def length(s):
    return 0 if s == \'\' else 1 + length(s[:-1])

print length(\'hello world\') # prints 11

def strlen(s):
  if s == \'\':
    return 0
  return 1 + strlen(s[1:])

       >>> def RecListValue(list_value):
               return type(list_value) in [list,str,tuple] and list_value and    1+RecListValue(list_value[1:]) or 0
       >>> example_struct  = [range(10), (\"one\",)*12, \"simple string\", 12]       
       >>> map(RecListValue, example_struct)
           [10, 12, 13, 0]
       >>>