# -*- coding: utf-8 -*-
 
 
def foo(a, b):
  c = a + b
  raise ValueError('test')
  return c
 
 
def bar(a):
  print('a + 100:', foo(a, 100))
 
 
def main():
  try:
    bar(100)
  except Exception as e:
    print(repr(e))
 
if __name__ == '__main__':
  main()

# -*- coding: utf-8 -*-
import logging
 
 
def foo(a, b):
  c = a + b
  raise ValueError('test')
  return c
 
 
def bar(a):
  print('a + 100:', foo(a, 100))
 
 
def main():
  try:
    bar(100)
  except Exception as e:
    logging.exception(e)
 
if __name__ == '__main__':
  main()

# -*- coding: utf-8 -*-
import traceback
import sys
 
 
def foo(a, b):
  c = a + b
  raise ValueError('test')
  return c
 
 
def bar(a):
  print('a + 100:', foo(a, 100))
 
 
def main():
  try:
    bar(100)
  except Exception as e:
    # 方法二
    traceback.print_exc()
 
    # 方法三
    msg = traceback.format_exc()
    print(msg)
 
    et, ev, tb = sys.exc_info()
    # 方法四
    traceback.print_tb(tb)
 
    # 方法五
    traceback.print_exception(et, ev, tb)
 
    # 方法六
    msg = traceback.format_exception(et, ev, tb)
    for m in msg:
      print(m)
 
if __name__ == '__main__':
  main()