Python try / except notes

While playing with the source code of the web application, I encountered the following situation.

--When you execute a certain function, you want to continue the process by passing only the error caused by the specific process. --There is a process that you want to be executed regardless of success or failure. --I want to notify the front desk that some errors have occurred during processing.

I wrote it like this in python's try / catch and it worked, so I'll write it down as a memorandum.

Sample code

class SampleException(Exception):
    pass


def specific_func(raise_error: bool):
    if raise_error:
        raise Exception("error from specific_func")
    else:
        print("[INFO] success specific_func")


def error_sample(raise_error: bool):
    try:
        specific_func(raise_error=raise_error)
    except Exception as e:
        print("[ERROR] ",e)
        raise SampleException("Some processing failed")
    finally:
        print("[INFO]The process you want to execute")

`main.py`



print("===Abnormal system=====================")
try:
    error_sample(raise_error=True)
    print("(notification)Successful processing")
except SampleException as e:
    print("(notification)", e)

print("===Normal system=====================")
try:
    error_sample(raise_error=False)
    print("(notification)Successful processing")
except SampleException as e:
    print("(notification)", e)

Execution result

===Abnormal system=====================
[ERROR]  error from specific_func
[INFO]The process you want to execute
(notification)Some processing failed
===Normal system=====================
[INFO] success specific_func
[INFO]The process you want to execute
(notification)Successful processing

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