1. syntax errors (arrow marks)

2. zero division error, name error, type error.

3. try except

    while True:

               try:

                    x = int(raw_input("Input:"))

                    break

               except ValueError:

                    print "Something wrong and re-input"

    not except will spread this error to up-level try.

    except (RuntimeError,TypeError,NameError), allow more than one except and the last except doesn‘t need to write the errors

    can add else at the end of except, code after this can execute when no exception.

4. force except

    try:

           raise NameError,‘hahah‘ # error name and parameter

   except NameError:

           print ‘afdafdf‘

           raise # another throw

5. user defined errors

6. clean

file or network

finally will execute no matter exception happed

if exception happened, after execute finally code and will throw again

Python - syntax errors and exception