Can't import my own modules in Python
I'm having a hard time understanding how module importing works in Python (I've never done it in any other language before either).
Let's say I have:
myapp/__init__.py myapp/myapp/myapp.py myapp/myapp/SomeObject.py myapp/tests/TestCase.py
Now I'm trying to get something like this:
myapp.py =================== from myapp import SomeObject # stuff ... TestCase.py =================== from myapp import SomeObject # some tests on SomeObject
However, I'm definitely doing something wrong as Python can't see that
myapp is a module:
ImportError: No module named myapp
In your particular case it looks like you're trying to import
SomeObject from the myapp.py and TestCase.py scripts. From myapp.py, do
since it is in the same folder. For TestCase.py, do
from ..myapp import SomeObject
However, this will work only if you are importing TestCase from the package. If you want to directly run
python TestCase.py, you would have to mess with your path. This can be done within Python:
import sys sys.path.append("..") from myapp import SomeObject
though that is generally not recommended.
In general, if you want other people to use your Python package, you should use distutils to create a setup script. That way, anyone can install your package easily using a command like
python setup.py install and it will be available everywhere on their machine. If you're serious about the package, you could even add it to the Python Package Index, PyPI.
Read more... Read less...
import looks for files into your PYTHONPATH env. variable and your local directory. So you can either put all your files in the same directory, or export the path typing into a terminal::
exporting path is a good way. Another way is to add a .pth to your site-packages location. On my mac my python keeps site-packages in /Library/Python shown below
I created a file called awesome.pth at /Library/Python/2.7/site-packages/awesome.pth and in the file put the following path that references my awesome modules
You can try
from myapp.myapp import SomeObject
because your project name is the same as the myapp.py which makes it search the project document first
In your first myapp directory ,u can add a setup.py file and add two python code in setup.py
from setuptools import setup setup(name='myapp')
in your first myapp directory in commandline , use pip install -e . to install the package
pip install on Windows 10 defaults to installing in 'Program Files/PythonXX/Lib/site-packages' which is a directory that requires administrative privileges. So I fixed my issue by running pip install as Administrator (you have to open command prompt as administrator even if you are logged in with an admin account). Also, it is safer to call pip from python.
python -m pip install <package-name>
pip install <package-name>