There are huge differences between classes and modules in Python. Classes are blueprints that allow you to create instances with attributes and bound functionality. Classes support inheritance, metaclasses, and descriptors. Modules can’t do any of this, modules are essentially singleton instances of an internal module class, and all their globals are attributes on the module … Read more
Firstly, this import statement: from models import some_model should be namespaced: # in myproject/backend/backend.py or myproject/api/api.py from myproject.models import some_model Then you will need to get the directory which contains myproject, let’s call this /path/to/parent, into the sys.path list. You can do this temporarily by setting an environment variable: export PYTHONPATH=/path/to/parent Or, preferably, you can … Read more
One way is to simply amend your path: import sys sys.path.append(‘C:/full/path’) from foo import util,bar Note that this requires foo to be a python package, i.e. contain a __init__.py file. If you don’t want to modify sys.path, you can also modify the PYTHONPATH environment variable or install the module on your system. Beware that this … Read more
There are two ways you can run a Python 3 script. python fibo.py: The argument is the name of the .py file. Dots are part of the filename. python -m fibo: The argument is the name of a Python module, without .py. Dots indicate packages; fibo.py means “the module py in the package fibo.” This … Read more
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.
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
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
import __main__ print(__main__.__file__)
The heapq module maintains the heap invariant, which is not the same thing as maintaining the actual list object in sorted order. Quoting from the heapq documentation: Heaps are binary trees for which every parent node has a value less than or equal to any of its children. This implementation uses arrays for which heap[k] … Read more
Add your docstring as the first statement in the module. “”” Your module’s verbose yet thorough docstring. “”” import foo # … For packages, you can add your docstring to __init__.py.