I have a Python class called “ClassA” and another Python class which is supposed to import ClassA which is “ClassB”. The directory structure is as follows:
MainDir ../Dir ..../DirA/ClassA ..../DirB/ClassB
How would I use
sys.path so that ClassB can use ClassA?
You really should be using packages. Then MainDir is placed at a point in the file system on sys.path (e.g. …/site-packages), then you can say in ClassB:
from MainDir.Dir.DirA import ClassA # which is actually a module
You just have to place files named
__init__.py in each directory to make it a package hierarchy.
as a literal answer to the question ‘Python Import from parent directory‘:
to import ‘mymodule’ that is in the parent directory of your current module:
import os parentdir = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) os.sys.path.insert(0,parentdir) import mymodule
__file__ attribute is not always set.
A more secure way to get the parentdir is through the inspect module:
import inspect currentdir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe()))) parentdir = os.path.dirname(currentdir)
You can use relative import (example from link, current module –
from . import D # Imports A.B.D from .. import E # Imports A.E from ..F import G # Imports A.F.G