Debugger.py

try:
    print('try...')
    r = 10 / 0
    print('result:', r)
except ZeroDivisionError as e:
    print('except:', e)
finally:
    print('finally...')
print('END')

# 用try来运行这段代码
# 如果执行出错，则后续代码不会继续执行
# 而是直接跳转至错误处理代码，即except语句块
# 执行完except后，如果有finally语句块，则执行finally语句块

try:
    print('try...')
    r = 10 / 4
    print('result:', r)
except ZeroDivisionError as e:
    print('except:', e)
finally:
    print('finally...')
print('END')

try:
    print('try...')
    r = 10/int('a')
    print('result:', r)
except ValueError as e:
    print('ValueError:', e)
except ZeroDivisionError as e:
    print('ZeroDivisionError:', e)
finally:
    print('finally...')
print('END')

import logging

def foo(s):
    return 10 / int(s)

def bar(s):
    return foo(s) * 2

def main():
    try:
        bar('0')
    except Exception as e:
        logging.exception(e)

main()
print('Also END')

class FooError(ValueError):
    pass

def foo(s):
    n = int(s)
    if n == 0:
        raise FooError('invalid value: %s' % s)
    return 10/n

foo('0')