python catch error

Python virtualenv Installation Library error ssl:certificate_verify_failed problem descriptive narrationUse PIP in accordance with virtualenv error, such as the following:Pip Install virtualenvcollecting Virtualenv/opt/python27/lib/python2. 7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:315: Snimissingwarning:an HTTPS request has been made, bu

Today, when I was learning a python custom function, I encountered a problem: I use the notepad++ Editor custom function, in the interactive environment using the From FileName Import function name Imports, has been an error, check several times, has been reported this error:The code is as follows:#-*-coding:utf-8-*-#Custom Function def function name (parameter 1, parameter 2 ...) : Then write the function

Import:LIB module files can be imported directly, if not to indicate the pathImport Class_test #具体到模块名Class_test.add (2, 5)Import specific to function nameFrom Class_test Import Add, Sub, ...Add (5, 6)The test code is placed below the IFif __name__ = = ' __main__ ': #执行程序的主入口Print ("Nice weather today!") ") # Executes the code only when you execute the code under the current moduleImport timeTime.sleep (4)Exception Handling in Python codeException:

System: Windows 10Python version: 3.5.2The following errors occur: 　　 C:\USERS\ZHUXY>PIP List 　　 Fatal Error in launcher:unable to create process using ' "'Try the solution:c:\users\zhuxy>python-m pip Install packageCollecting PackageDownloading package-0.1.1.tar.gzComplete output from command python setup.py egg_info:Traceback (most recent):File "File "C:\Users\

It is strange to encounter a problem recently in writing a Python script: Thepython script is perfectly fine, but the total error "attributeerror: 'module ' object has no Attribute ' xxx '. This is actually. There is a problem with the PYc file. Problem Locator:View The source file of the import library, discover that the source file exists and that there are no errors, and that the source file exists. PYC

Recently in the "Python Natural language Processing," the Chinese version of the book, probably because it is from py2.x to py3.x, plus the reason for the update of NLTK, or some of the author's clerical errors, in the book a lot of code can not be run, the following I would like to tidy up a bit of problematic code.The first chapter:P3. The office is a small suggestion, there is no error in the book: About

This article mainly for you in detail the Python loading Excel error resolution method, with a certain reference value, interested in small partners can refer to From pandas import Series, DataFrame Import Pandas as PD Import NumPy as NP Import OS Import Sys Reload (SYS) Sys.setdefultencoding (' Utf-8 ') File1=pd.read_excel (' f:/dataanalysis/statistics/pelicanstores.xlsx ')

Today to do the curriculum design encountered with the database interaction, the SQLite database is set to UTF-8 format encoding, inserted into the database is correct, but when read out of the error, the reason is that Python str default is ASCII encoding, collect online data, many times to try, The problem is solved, add the following sentence in the code:Import sysreload (SYS) sys.setdefaultencoding ('UT

This error can easily be misunderstood, and most people will assume that the command is executed, but the command cannot find the file or directory that corresponds to the parameter. In fact, there is a layer of meaning, that is, this command cannot be found, the command can not be found, will also be reported without this file or directory error.Why can't we find this command?1. Malformed, can not pass directly to the string, if passed directly to th

Run the following Python program error couldn ' t find path to Unrar Library solution:#!/usr/bin/python#-*-coding:utf-8-*-from unrar Import rarfilefile = Rarfile. Rarfile ('/root/ssl.rar ') file.extractall ('/tmp ')Note: Rarfile has been installed through PIP3 install Rarfile, but unrar with PIP3 although the prompt is successful but there is a problem, so manual

There are now files in the data.csv file encoding format: ANSIData.csv1|1|1| Beijing 2|1|2| Tianjin 3|1|3| Shanghai 4|1|4| Chongqing city 5|1|5| Shijiazhuang City 6|2|5| Tangshan 7|3|5| Qinhuangdao Shi 8|4|5| Hanhan 9|5|5| Xingtai 10|6|5| Baoding 11|7|5| Zhangjiakou 12|8| 5| Chengde 13|9|5| Cangzhou 14|10|5| Langfang 15|11|5| Hengshui 16|1|6| Taiyuan 17|2|6| DatongEnter the following code in the Python console:>>> Import pandas as PD>>> df = pd.read_e

Chapter ContentRequests module ErrorExecution: res = requests.post (api,mdata = post_data)Error: Sslerror:eof occurred in violation of protocol (_SSL.C:600)Command test:　　Apparently the SSL handshake did not succeed,View the OpenSSL version, not the latest version, and then the latest version, butPython-c ' Import SSL; Print (SSL. openssl_version) ', Python or old version, do not know how to upgrade OpenSSL

It is strange to encounter a problem recently in writing a Python script: Thepython script is perfectly fine, but the total error "attributeerror: 'module ' object has no Attribute ' xxx '. This is actually. There is a problem with the PYc file. Problem Locator:View The source file of the import library, discover that the source file exists and that there are no errors, and that the source file exists. PYC

Configure Python+mod_wsgi+apache when accessing server in Browser error: Invalid http_host header: ' XXXXX '. Need to add u ' XXXXX ' to allowed_hosts, add allowed_hosts[' * ' in setting.py to invalid reason: Apache is not configured servername localhost:80 After the configuration is complete, the above problems are resolvedFailure behavior is: access to Apache using localhost is OK, single cannot use local

1. First use EXE file to install Python-mysql. Link: Http://pan.baidu.com/s/1kVqILTX Password: Manj.2. After the virtual environment is created, we copy the four files that have been installed in the public environment using EXE to the corresponding directory in the virtual environment (copy to the \venv\lib\site-packages folder under the virtual environment):MySQL_python-1.2.3-py2.7.egg-infoMySQLdb_mysql.pyd_mysql_exceptions.pyAnd then we check that

Python uses the pickle module to store data and reports an error to solve the sample code, pythonpickle This article focuses on how to use the pickle module in Python to store data error solutions. The solution is presented in the form of Code as follows. First, let's take a lookPickle Module Pickle provides a simpl