Functions defined in built-in modules need to be imported before use. On similar lines, a custom module may have one or more user-defined Python objects in it. These objects can be imported in the interpreter session or another script....
This all happened because Python caches modules.In Python, every module that is imported is stored in a dictionary called sys.modules.This dictionary maps the name of each module to the module object it represents:>>> import sys >>> sys.modules['points'] <module 'points' from '/home/...
Modules can import other modules. It is customary but not required to place allimportstatements at the beginning of a module (or script, for that matter). The imported module names are placed in the importing module’s global symbol table. There is a variant of theimportstatement that imports...
_io -I$(srcdir)/Modules/_io _io/_iomodule.c _io/iobase.c _io/fileio.c _io/bytesio.c _io/bufferedio.c _io/textio.c _io/stringio.c # The zipimport module is always imported at startup. Having it as a # builtin module avoids some bootstrapping problems and reduces overhead. ...
Aliasing Modules It is possible to modify the names of modules and their functions within Python by using theaskeyword. You may want to change a name because you have already used the same name for something else in your program, another module you have imported also uses that name, or you...
6.1.1. Executing modules as scripts When you run a Python module with 当你这样运行Python模块: python fibo.py <arguments> the code in the module will be executed, just as if you imported it, but with the__name__set to"__main__". That means that by adding this code at the end of...
This means that the Python standard library contains an extensive set of packages and modules to help developers with their coding projects. At the same time, Python has an active community that contributes an even more extensive set of packages that can help you with your development needs. ...
Executing Python modules Modules can be imported into other modules or they can be also executed. Module authors often create a testing suite to test the module. Only if the module is executed as a script, the__name__attribute equals to'__main__'. ...
You imported subprocess and then called the run() function with a list of strings as the one and only argument. This is the args parameter of the run() function.On executing run(), the timer process starts, and you can see its output in real time. Once it’s done, it returns an ...
Building a complete Python installation requires the use of various additional third-party libraries, depending on your build platform and configure options. Not all standard library modules are buildable or usable on all platforms. Refer to theInstall dependenciessection of theDeveloper Guidefor current...