Python - Exceptions

官方文档：https://docs.python.org/3/library/exceptions.html

1. 使用try...except...

2. 输出错误信息的方式为：

try:
    cursor.execute(sql)
    db.commit()
except Exception as inst:
    print(inst.args)
    db.rollback()

3.

时间： 2024-10-10 05:42:01

Python - Exceptions的相关文章

使用gdb调试Python进程

http://www.cnblogs.com/dkblog/category/287362.html https://wiki.python.org/moin/DebuggingWithGdb There are types of bugs that are difficult to debug from within Python: segfaults (not uncaught Python exceptions) hung processes (in cases where you can

Checked Exceptions

记得当年在程序员杂志上看出这次访谈,10多年过去了, 这件事儿最近被重提了, 原因是 Kotlin. 1.对Checked Exceptions特性持保留态度 (译者注:在写一段程序时,如果没有用try-catch捕捉异常或者显式的抛出异常,而希望程序自动抛出,一些语言的编译器不会允许编译通过,如Java就是这样.这就是Checked Exceptions最基本的意思.该特性的目的是保证程序的安全性和健壮性.Zee&Snakey(MVP)对此有一段很形象的话,可以参见: http://www.b

Python/C++ in Visual Studio: An Alternative to Matlab/MEX

来自Andrew Delong的博客 http://andrewdelong.wordpress.com/2012/11/03/pythonc-in-visual-studio-an-alternative-to-matlabmex/ I spent much of my PhD working in Matlab with C++ MEX extensions. Debugging MEX extensions is frustrating: either you resort to prin

『Python CoolBook』C扩展库_其六_从C语言中调用Python代码

一.C语言运行pyfun的PyObject对象 思路是在C语言中提供实参,传给python函数: 获取py函数对象(PyObject),函数参数(C类型) 获取GIL(PyGILState_Ensure) 确保fun对象可调用 参数转换为python对应类型(Py_BuildValue) 调用python函数(PyObject_Call) 确定调用无异常 检查返回值 释放GIL(PyGILState_Release) 异常处理 #include "Python.h" /* Execut

Pyhon 嵌入C/C++模块（一）

1 Extending Python with C or C++ It is quite easy to add new built-in modules to Python, if you know how to program in C. Such extension modules can do two things that can’t be done directly in Python: they can implement new built-in object types, an

Python Tutorial 学习(八)--Errors and Exceptions

8. Errors and Exceptions 错误与异常 此前,我们还没有开始着眼于错误信息.不过如果你是一路跟着例程走过来的,你就会发现一下错误信息.在Python里面至少有两类错误:语法错误和异常(syntax errors and exceptions) 8.1. Syntax Errors 语法错误 语法错误就是语法错误,语法错误就是语法错误. 比如说,关键词拼写错误,缩进错误,标点符号错误等等,比如下面这个栗子里面的在while循环的时候漏写了冒号引起的语法错误,注意错误提示中意既

python交互式环境，django模板报错：django.core.exceptions.ImproperlyConfigured

环境: ubuntu django 1.5 virtualenv环境中 (web01)[email protected]:~/.virtualenvs/web01/dj_01/pro01$ python Python 2.7.6 (default, Mar 22 2014, 22:59:56)  [GCC 4.8.2] on linux2 Type "help", "copyright", "credits" or "license&q

python selenium模块使用出错-selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH.

Python 2.7+selenium+Firefox 55.0.3 代码: from selenium import webdriver from selenium.common.exceptions import NoSuchElementException from selenium.webdriver.common.keys import Keys import time browser = webdriver.Firefox() # Get local session of firef

解决python爬虫requests.exceptions.SSLError: HTTPSConnectionPool(host='XXX', port=443)问题

爬虫时报错如下: requests.exceptions.SSLError: HTTPSConnectionPool(host='某某某网站', port=443): Max retries exceeded with url: /login/ (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'tls_process_server_certificate', 'certificate verify fail