000-- define a function to check if a string is a symmatrical string
running result:
referred :
how to reverse a string:
http://www.jb51.net/article/15700.htm
001-- define a function to count the passed parameters's amount of letters, digits, spaces, and other symbols
count('I love DuoKai.reedy', 'I love you because who I am while I with you. wish we are the best1314.!@#$')
running result:
002-- functions in python
in python, all the functions have something for return even there is no 'return' request in the code. the type for the non return function is 'None'
004-- you can return almost all the types for the functions . By default, you need to put them in the tupple with ' , ' to separate them.
005-- Do not use too much global values when it's not mandatory
