python 2.7 re-raise

re-raise-2.py

exc_type, exc_val, tb = sys.exc_info()
raise CustomError("oops," +str(e), ["AAA", "BBB"]), None, tb

re-raise.py

# raise error
import traceback
import sys

class CustomError(Exception):
    pass


def reraise(e, new_type=None, new_value=None):
    """
    Args:
        e Exception: orig exception instance
        new_type: new Exception class
        new_value: args for new error type, value for reraise. if none . raise original error message
    code-block:
        try:
            1/0
        except Exception as e:
            reraise(e, CustomError, "oops, " + str(e))
    """
    exc_type, exc_val, tb = sys.exc_info()
    exc_type = new_type or exc_type
    exc_val = new_value or exc_val
    raise exc_type, exc_val, tb




try:
    try:
        1/0
    except Exception as e:
        reraise(e, CustomError, "oops, " + str(e))
except Exception as e:
    print(repr(e))
    print("=========")
    traceback.print_exc()