I prefix private modules with an underscore to communicate the intent to the user. In your case, this would be mypack._mod_b This is in the same spirit (but not completely analogous to) the PEP8 recommendation to name C-extension modules with a leading underscore when it’s wrapped by a Python module; i.e., _socket and socket.
For Python 3.5+ use (docs): import importlib.util import sys spec = importlib.util.spec_from_file_location(“module.name”, “/path/to/file.py”) foo = importlib.util.module_from_spec(spec) sys.modules[“module.name”] = foo spec.loader.exec_module(foo) foo.MyClass() For Python 3.3 and 3.4 use: from importlib.machinery import SourceFileLoader foo = SourceFileLoader(“module.name”, “/path/to/file.py”).load_module() foo.MyClass() (Although this has been deprecated in Python 3.4.) For Python 2 use: import imp foo = imp.load_source(‘module.name’, ‘/path/to/file.py’) foo.MyClass() … Read more
import checks to see if the module is in sys.modules, and if it is, it returns it. If you want import to load the module fresh from disk, you can delete the appropriate key in sys.modules first. There is the reload builtin function which will, given a module object, reload it from disk and that … Read more
Short Answer It’s boilerplate code that protects users from accidentally invoking the script when they didn’t intend to. Here are some common problems when the guard is omitted from a script: If you import the guardless script in another script (e.g. import my_script_without_a_name_eq_main_guard), then the latter script will trigger the former to run at import … Read more
I solved it myself. I use the wheel installer from http://www.lfd.uci.edu/~gohlke/pythonlibs/#mysql-python. There are two wheel packages there. The amd64 one refuses to install on my platform (Windows) but the other one works just fine. I mean the file with this name: MySQL_python-1.2.5-cp27-none-win32.whl Then install it by running this below command in the same folder with … Read more
If you are running app/server.py as a script, the parent directory of app is not added to sys.path(). The app directory itself is added instead (not as a package but as a import search path). You have 4 options: Move server.py out of the app package (next to it) Add a new script file next … Read more
Imported modules are just variables – names bound to some values. So all you need is to import them and make them global with global keyword. Example: >>> math Traceback (most recent call last): File “<stdin>”, line 1, in <module> NameError: name ‘math’ is not defined >>> def f(): … global math … import math … Read more
import __main__ print(__main__.__file__)
Modules can import each other cyclically, but there’s a catch. In the simple case, it should work by moving the import statements to the bottom of the file or not using the from syntax. Here’s why that works: When you import a module, Python first checks sys.modules. If it’s in there, it just imports from … Read more
http://docs.python.org/3/tutorial/modules.html#the-module-search-path 6.1.2. The Module Search Path When a module named spam is imported, the interpreter first searches for a built-in module with that name. If not found, it then searches for a file named spam.py in a list of directories given by the variable sys.path. sys.path is initialized from these locations: The directory containing the … Read more