I've been trying to understand the importlib.metadata library from Python 3.8 but can't seem to figure why it won't work.
As per the documentation https://docs.python.org/3.8/library/importlib.metadata.html, after installing Python3.8 and wheel package (via pip):
>> from importlib.metadata import version
>> version('wheel')
ImportError: cannot import name 'MetadataPathFinder' from 'importlib.metadata'
Running the following command helped in my case python -c "import importlib.metadata, shutil, pathlib; file = pathlib.Path(importlib.metadata.__file__); str(file).endswith('__init__.py') and shutil.rmtree(file.parent) and print('removed', file.parent)"
Taken from https://bugs.python.org/issue38342#msg353736
Related
I am trying to use the calc module in metpy. I have installed it both via pip and 'conda forge' option. When i run my script in spyder, i get the following error
ImportError: cannot import name 'AuthorityMatchInfo' from 'pyproj._crs' eg Example file path : (~anaconda3/lib/python3.7/site-packages/pyproj/_crs.cpython-37m-x86_64-linux-gnu.so)
Had the same issue two times and solved it by following advice I found on github.
Basically one needs to uninstall pyproj and reinstall.
I have successfully installed the streamlit package using the following
shell command and can run the resulting local server localhost:8501
Python3.8 -m pip install streamlit
In Eclipse, the module appears under the Package Library in the Python Interpreter.
I can import it as a library item in a PyDev module as as follows:
import streamlit
The only note I get from the compiler is that streamlit is an ‘unused import’. However, when I append the command as follows the compiler then says ‘unresloved import st’
import streamlit as st
Both ‘import streamlit’. and ‘import streamlit as st’ will not code complete.
How can I clear the ’unresolved import’ message ?
The sys.path is as follows:
/Users/davidklemitz/eclipse-workspace/streamlit
/Users/davidklemitz/eclipse-workspace/streamlit
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/lib-dynload
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages
/Library/Frameworks/Python.framework/Versions/3.8/lib/python38.zip
Thanks in advance for any help.
I solved the problem. Turns out it was a compound of two issues.
First the name of the PyDev module I chose was the same name as the package module name streamlit.py, installed using the following command
Python3.8 -m pip install streamlit
Second, I had a look at the PYTHONPATH under Eclipse->Preferences-> PyDev->Interpreters-> Python Interpreter where these paths were arranged as follows:
/Library/Frameworks/Python.framework/Versions/3.8/lib
/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages
As streamit.py was in the second and not the first, I reversed the order, restarted Eclipse, created a new PyDev project and associated development model named stream_lit.py and the code completed as expected.
I have a problem. When writing the "pip install pyowm" command to the console, the module is installed, but the system doesn't see it. For example, Phyton, when executing the command "impor pyowm", gives an error, and when writing the command "pyowm" to the console, the error "" pyowm " is not an external or internal command".
All of the above apply to other modules as well.
P.S. I use VS Code and Python v.3.8.3
From https://github.com/csparpa/pyowm:
from pyowm import OWM
The package name (pyowm) and the module name (OWM) do not necessarily need to correspond.
You can't just use any tool just by name from the console.
You have to first enter python to the console and then try import pyowm again.
It should import pyowm. But later you may want to actually use pyowm. Then you use this import most of the time:
from pyowm.owm import OWM
I wanted to upgrade my python version from 3.5 to 3.6. Since I am using WinPython, I have downloaded and installed the recent version just as I did it before with version 3.5.
However, if I use version 3.6 I get a ModuleNotFoundError whenever I import a self-created module. A minimal example: I created a file t1.py that contains only a pass statement and a file t2.py containing the following code:
import t1
print("done")
Both files are in the same folder D:\MyProject\src. Now when I run the file with python 3.5, everything works fine:
'C:\Program Files\WinPython-64bit-3.5.1.2\python-3.5.1.amd64\python.exe' D:\MyProject\src\t2.py
done
However, with python 3.6 I get
'C:\Program Files\WinPython-64bit-3.6.0.1Qt5\python-3.6.0.amd64\python.exe' D:\MyProject\src\t2.py
Traceback (most recent call last):
File "D:\MyProject\src\t2.py", line 6, in <module>
import t1
ModuleNotFoundError: No module named 't1'
I ran out of ideas what the issue could be and would appreciate new inspiration.
Would this work ? in t2.py
import os
__path__=[os.path.dirname(os.path.abspath(__file__))]
from . import t1
print("t2 done")
Python-3.6 changes its way of working, with the "python._pth" file next to python.exe (instead of "pyvenv.cfg" in previous versions)
If you don't want to modify your source, then you have to add "D:\MyProject\src" line in Python._pth file, or a relative path to it from python._pth location. in my example, it works with:
python36.zip
DLLs
Lib
.
..\test
import site
"http://bugs.python.org/issue29578?#ok_message=msg%20287921%20created%0Aissue%2029578%20message_count%2C%20messages%20edited%20ok&#template=item"
Other, simpler solution if you have no system-installed python: rename the "python._pth" file, next to "python.exe", as "pythonzz._pth"
The Python "Windows" maintainer just wrote that the simpler solution should be ok also with Python-3.6.0.
First of all I'm aware of the question here but I couldn't find a satisfied answer there. I don't want to ignore errors or use comments - I want to have the right settings in eclipse/pydev. My problem is pretty similar to this one.
I'm using Ubuntu 12.04 and installed a virtuenv for python 2.7 in my home directory. After installing several python packages (numpy, scipy, matplotlib, etc.) using pip, I installed eclipse 4.3 with pydev.
If I use the python system interpreter at /usr/bin/python everything works fine (except that I didn't want to use). However, if I try to set up a python interpreter using the virtualenv first I get this warning describe here. After clicking "proceed anyway", it seems to work. So far so good.
However e.g. import numpy as np gives for each np.* call the eclipse/pydev error Undefined variable from import, also the code completion doesn't work properly. It seems to work, e.g. for datetime, but not for numpy, scipy and matplotlib.
Does anybody figured out to configure eclipse correctly?
I already tried to add the numpy path manually to the virtualenv interpreter, but than I get the weird error:
import matplotlib.dates as mpl_dates
File "/home/pydev/myenv-py27/local/lib/python2.7/site-packages/matplotlib/init.py", line 149, in
import sys, os, tempfile
File "/usr/lib/python2.7/tempfile.py", line 34, in
from random import Random as _Random
ImportError: cannot import name Random