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Questions tagged [try-except]

A form of error handling in Python and Delphi, similar to try/catch in C-like languages. It is also a Microsoft extension in C and C++.

Try/Except is a form of error handling in Python and Delphi, similar to try/catch in C-like languages. It is also a Microsoft extension in C and C++.

Links

Error Handling in Python
Except Keyword in Delphi
Try/Except in Microsoft C and C++

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Try Except float but not integer

So, I've approached an obstacle in a programming exercise. I understand the concept of try except but how can I use a try except handler to only accept a float or decimal and if a whole number or integer is entered, it throws an error message. I…
Gallieon474
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How to trace back the cause of an exception raised within a function?

(This is a follow-up question to the post Python try/except: Showing the cause of the error after displaying my variables.) I have the following script.py: import traceback def process_string(s): """ INPUT ----- s: string …
kaloyan-marinov
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c++ try-except statement

I came across this article about detecting VMWare or Virtual PC http://www.codeproject.com/KB/system/VmDetect.aspx and I saw that they use some kind of try-except statement. So I looked it up in the MSDN:…
Idov
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How to say in Pythonese - do something unless it causes an error (without resorting to multilevel try/execpt blocks)

This is a little difficult to explain, so let's hope I'm expressing the problem coherently: Say I have this list: my_list = ["a string", 45, 0.5] The critical point to understand in order to see where the question comes from is that my_list is…
Jack Fleeting
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Python Unit Test for Try/Except Block

I have the following function with unit tests: #!/usr/bin/env python3 # https://docs.python.org/3/library/ipaddress.html # https://docs.python.org/3.4/library/unittest.html import ipaddress import unittest from unittest.mock import patch from…
marshki
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python try except as a function to evaluate expressions

I have tried creating a function that tries an expression and returns zero if errors are risen. def try_or_zero(exp): try: exp return exp except: return 0 Which obviously doesn't work. It seems the problem is that…
Victor Sg
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Try except recursion or while loop?

I am doing a python course where they suggested a try and except block in a while loop in order to keep asking for input until the condition is satisfied. Intuitively I feel it is shorter to just call the function again in the "except" block like…
Dutchpirate91
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Python selenium CTRL+C closes chromedriver

How can I catch CTRL+C (a KeyboardInterrupt) without causing the chromedriver to close. It closes the chromedriver when I run my script.py through cmd. driver = webdriver.Chrome() try: while True: #do stuff with chromedriver except…
Programer Beginner
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Is it possible to add a timeout in try block in python

I am trying to download a URL using python-wget downloaded from : https://pypi.python.org/pypi/wget This package does not support a timeout option, hence it takes some time (around 10seconds) roughly for a query to fail. Is it possible to add a…
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How can i add the functions try/except in this code?

I'm still creating this code where via a dictionary attack i find a password, inserted by the user. However I would insert some controls in the input of the file's source (ex. when I type the source of a file that doesn't exist) and when I open a…
HaCk81t
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try-except block: analogue for 'else' if exception was raised

I have this kind of code: try: return make_success_result() except FirstException: handle_first_exception() return make_error_result() except SecondException: handle_second_exception() return make_error_result() And I'm…
3Gee
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Try-except for unknown function?

I'm trying to make a function that will test if a function exists or not, and then return a boolean value based on if it exists or not. Here's my code; however, Python IDLE 3.5 tells me that there is an error with my eval() statement, but I don't…
richzli
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Ctrl-C ends my script but it is not caught by KeyboardInterrupt exception

I have a Python script that contains a big loop reading a file and doing some stuff (I am using several packages like urllib2, httplib2 or BeautifulSoup). It looks like this : try: with open(fileName, 'r') as file : for i, line in…
Thematrixme
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Error handlers in python

I have a trouble to find the "pythonic" way to do this: I need to catch different blocks of code with the same try-except pattern. The blocks to catch are different from each other. Currently I am repeating the same try-except pattern in several…
Garet
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try except unnecessary step

Is it always safe to use hello2 instead of hello1 ? def hello1(): try: aaa = foo() return aaa except baz: return None def hello2(): try: return foo() except baz: return None
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