python catch error

Python Crawler Tutorial -09-error moduleToday's protagonist is the error, crawl, it is easy to appear wrong, so we have to do in the code, common mistakes in the place, about Urllib.errorUrlerror Reasons for Urlerror production: 1. No network connection 2. Server Connection failure 3. The specified server could not be found 4

Python base64 decode incorrect padding error solution, base64padding The following error is returned when the base64.decodestring method of python performs base64 decoding:Copy codeThe Code is as follows:Traceback (most recent call last ):File "/export/www/outofmemory.cn/controllers/user.py", line 136, in decryptPasswo

This article mainly introduces the Python JSON error XX is not JSON serializable solution of the relevant information, the need for friends can refer to the following Python JSON error XX is not json serializable workaround When using JSON, you often encounter xxx is not JSON serializable, which means that some object

Problem Description : command "python setup.py egg_info" failed with error whether you are using the import and install command directly in Pycharm or PIP Code 1 is a description of the problem, you need to consider the source of the PIP may not have a corresponding python3.5 moduleworkaround : You can usually go directly to Google "XXX for python3.5" or find the corresponding python3.5 item in github and a

Python: WinReg Item Module: Windows 7: No Invalid HKEY errorPython winregI encountered a problem while reading the registry value of the Windows 7 winth winreg item module. Any pointers to resolve the code:try: ParentKey = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE,"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall") i = 0 while 1: name, value, type = _winreg.EnumValue(ParentKey, i) print repr(name), i += 1except Exception as e: print(Excepti

Start the Idle times subprocess Startup error ErrorError messageIDLE ' s subprocess didn ' t make connection. either IDLE cant ' t start a subprocess or personal firewall software is blocking the connection.Because of the firewall, here's how to solve the problem:1) Open the Control Panel2) allow the program to pass through the firewall3) allow another program to run4) Select the path to the Python installa

Let's start with the wrong question in reading the configuration file--configparser.missingsectionheadererror:file contains no section headersProblem Description:While practicing Configparser reading the configuration file, Cmd always reported an error:ConfigParser.MissingSectionHeaderError:File contains no section headers.D:\test_python>python task_test.pyTraceback (most recent):File "task_test.py", line A, in Pp=parsepageobjectrepositoryconfig ()Fil

2018-03-0223:58:59First run the cmd command in case you have successfully installed Python, download and install the OpenCV pluginIf the command line can be usedImport Cv2But on the IDE only import CV2 error, that is the IDE configuration problemscan be resolved byThen we find Cv.2 's address.Add the PIP command to install the Python OpenCV script address as foll

when you run or write a program that often encounters an error exception, Python will give you an error prompt class name to tell what the problem is (Python is an object-oriented language, so the exception that the program throws is also a class). A good understanding of the meaning of these

There are often errors in the development of Python, but warning usually does not affect the operation of the program, and sometimes particularly annoying, below we can ignore the warning error. Before we talk about ignoring warning, we first say how to proactively generate warning errors, and here we use the Warnings module to see the following code: Import Warningsdef fxn (): warnings.warn ("depreca

Json.dumps python error: ' UTF8 ' codec can ' t decode byte 0xe1 in position 5 ... Because of the working relationship, you want to use Python to generate JSON data as a text file, but you encounter the above coding problem: Import JSON Json.dumps (RST) ERROR: "Unicodedecodeerror: ' UTF8 ' codec can ' t decode byte

Python 3.6.4/win10 when using pip to install keras, an error occurred while installing the dependent PyYAML, win10keras PS C:\Users\myjac\Desktop\simple-chinese-ocr> pip install kerasCollecting keras Downloading http://mirrors.aliyun.com/pypi/packages/68/89/58ee5f56a9c26957d97217db41780ebedca3154392cb903c3f8a08a52208/Keras-2.1.2-py2.py3-none-any.whl (304kB) 100% |████████████████████████████████| 307kB

The Python language is a language that is very sensitive to indentation, confusing to many beginners, and even a very experienced Python programmer can be caught in a trap. The most common scenario is that the mix of tab and space results in an error, or indentation is incorrect, which is not possible with the naked eye.This