![]() ![]() Not able to clean up themselves when deleted, it may result in resource If suchĭata constituted handles to database connections, and the connections are The act of reloading script files also means that any data previously heldīy the module corresponding to the script file will be deleted. In conjunction with objects defined in the script file are furtherĭiscussed in the document Issues With Pickle Module. The technical reasons for the limitations on the use of the “pickle” module ![]() Or instances of classes which are defined in the script file should be In practice what this means is that neither function objects, class objects With objects contained within the script file. Implications when it comes to using the “pickle” module in conjunction Not result in the same data being accessed as exists in the script fileīecause the script file is not treated like a normal Python module also has Importing the script file directly and accessing it will therefore This isīecause script files are loaded under a module name which is keyed to theįull absolute path for the script file and not just the basename of theįile. If an attempt is made to import the script file as a module the result willīe that it will be loaded a second time as an independent module. The directory containing the script into sys.path explicitly. Not use the ‘.py’ extension on script files or never place script files inĪ directory which is located on the standard module search path, nor add Never try to import the file from another code file using the ‘import’ The script file is not treated like a normal module means that you should This will ensure that the path doesn’t get added multiple times.Įven where the script file is named so as to have a ‘.py’ extension, that Import sys path = '/usr/local/wsgi/modules' if path not in sys. This means that when updating sys.path, instead of using: Has not already been made, else duplicate data will be added every time the Modifications to sys.path or other global data structures and theĬhanges are additive, checks should first be made to ensure that the change The first issue is that when the script file is imported, if the code makes Script file can do or how it should be implemented. Number of implications and imposes certain restrictions on what code in the That only the script file and not the whole process is reloaded also has a In embedded mode and needed to change your ‘settings.py’ file, you would Normal Python code files which are used by your WSGI application, you will Reloaded, no other Python modules are reloaded. General purpose code reloading mechanism. ![]() If the script weren’t reloaded in this way, you would need to restartĪpache even for a trivial change to the script file.ĭo note though that this script reloading mechanism is not intended as a Getting any configuration in it and the mapping to the application correct. Intent with the file being reloaded is to provide a second chance at It is even preferred that a ‘.py’Įxtension not be used for reasons described below.įor embedded mode, one of the properties of the script file is that byĭefault it will be reloaded whenever the file is changed. This script file is not treated exactly like a normal Python module and Have a script file which contains the entry point for the WSGI application. However you have configured Apache to mount your WSGI application, you will Then substitute your WSGI application entry point with: If you are not sure whether you are using embedded mode or daemon mode, WSGIDaemonProcess/WSGIProcessGroup directives to delegate your WSGIĪpplication to a mod_wsgi daemon mode process, then you will be using If you are running on Windows, are using Apache 1.3, or have not used Handling requests and in which your WSGI application runs, there is moreĪvenue for performing automatic source code reloading.Īs a consequence, it is important to understand what mode your WSGI If using daemon mode, because mod_wsgi manages directly the processes Mode you will have no choice but to manually restart Apache in order for code You make code changes is largely dictated by how Apache works, as itĬontrols the processes handling requests. If your WSGI application is running in embedded mode then what happens when Which mode your WSGI application is running. What is achievable in the way of automatic source code reloading depends on ![]()
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