Python-syntax errors and exception

Python-syntax errors and exception

1. syntax errors (arrow marks)

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

3. try again t

While True:

Try:

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

Break

Failed t ValueError:

Print "Something wrong and re-input"

Not enough t will spread this error to up-level try.

Failed t (RuntimeError, TypeError, NameError), allow more than one failed t and the last modified t doesn't need to write the errors

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

4. force failure t

Try:

Raise NameErrZ restart? Http://www.bkjia.com/kf/ware/vc/ "target =" _ blank "class =" keylink "> vciw =" hahah' # error name and parameter

Failed t NameError:

Print 'afdafd'

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