PyDev和Eclipse的未解决的导入问题

I am very new to PyDev and Python, though I have used Eclipse for Java plenty. I am trying to work through some of the Dive Into Python examples and this feels like an extremely trivial problem that’s just becoming exceedingly annoying. I am using Ubuntu Linux 10.04.

I want to be able to use the file odbchelper.py, which is located in the directory /Desktop/Python_Tutorials/diveintopython/py

Here is my example.py file that I’m working on in my PyDev/Eclipse project:

import sys
sys.path.append("~/Desktop/Python_Tutorials/diveintopython/py")

This works fine, but then I want the next line of my code to be:

import odbchelper

and this causes an unresolved import error every time. I have added __init__.py files to just about every directory possible and it doesn’t help anything. I’ve tried adding __init__.py files one at a time to the various levels of directories between the project location and the odbchelper.py file, and I’ve also tried adding the __init__.py files to all of the directories in between simultaneously. Neither works.

All I want to do is have a project somewhere in some other directory, say /Desktop/MyStuff/Project, in which I have example.py … and then from example.py I want to import odbchelper.py from /Desktop/Python_Tutorials/diveintopython/py/

Every message board response I can find just saying to use the sys.path.append() function to add this directory to my path, and then import it … but that is precisely what I am doing in my code and it’s not working.

I have also tried the Ctrl–1 trick to suppress the error message, but the program is still not functioning correctly. I get an error, ImportError: No module named odbchelper. So it’s clearly not getting the path added, or there is some problem that all of my many permutations of adding __init__.py files has missed.

It’s very frustrating that something this simple… calling things from some file that exists somewhere else on my machine… requires this much effort.

In the properties for your pydev project, there’s a pane called “PyDev – PYTHONPATH”, with a sub-pane called “External Libraries”. You can add source folders (any folder that has an __init__.py) to the path using that pane. Your project code will then be able to import modules from those source folders.

I am using eclipse kepler 4.3, PyDev 3.9.2 and on my ubuntu 14.04 I encountered with the same problem. I tried and spent hours, with all the above most of the options but in vain. Then I tried the following which was great:

• Select Project-> RightClick-> PyDev-> Remove PyDev Project Config
• file-> restart

And I was using Python 2.7 as an interpreter, although it doesn’t effect, I think.

I just upgraded a WXWindows project to Python 2.7 and had no end of trouble getting Pydev to recognize the new interpreter. Did the same thing as above configuring the interpreter, made a fresh install of Eclipse and Pydev. Thought some part of python must have been corrupt, so I re-installed everything again. Arghh! Closed and reopened the project, and restarted Eclipse between all of these changes.

FINALLY noticed you can ‘remove the PyDev project config’ by right clicking on project. Then it can be made into a PyDev project again, now it is good as gold!

I fixed my pythonpath and everything was dandy when I imported stuff through the console, but all these previously unresolved imports were still marked as errors in my code, no matter how many times I restarted eclipse or refreshed/cleaned the project.

I right clicked the project->Pydev->Remove error markers and it got rid of that problem. Don’t worry, if your code contains actual errors they will be re-marked.

project–>properties–>pydev-pythonpath–>external libraries –> add source folder, add the PARENT FOLDER of the project. Then restart eclipse.

Here is what worked for me (sugested by soulBit):

1) Restart using restart from the file menu
2) Once it started again, manually close and open it.

This is the simplest solution ever and it completely removes the annoying thing.

There are two ways of solving this issue:

• Delete the Python interpreter from “Python interpreters” and add it again.
• Or just add the folder with the libraries in the interpreter you are using in your project, in my case I was using “bottle” and the folder I added was “c:\Python33\Lib\site-packages\bottle-0.11.6-py3.3.egg”

Now I don’t see the error anymore, and the code completion feature works as well with “bottle”.

I’m running Eclipse 4.2.0 (Juno) and PyDev 2.8.1, and ran into this problem with a lib installed to my site-packages path. According to this SO question:

Pydev and *.pyc Files

…there is an issue with PyDev and pyc files. In the case of the particular lib I tried to reference, all that is delivered is pyc files.

Here’s what I did to address this:

1. Install uncompyle2 from https://github.com/Mysterie/uncompyle2

2. Run uncompyle2 against the *.pyc files in the site-packages lib. Example:

   uncompyle2 -r -o /tmp /path/to/site-packages/lib

3. Rename the resulting *.pyc_dis files produced from uncompyle2 to *.py
4. Move / copy these *.py files to the site-packages path
5. In Eclipse, select File > Restart

The unresolved import error relating to .pyc files should now disappear.

Following, in my opinion will solve the problem

1. Adding the init.py to your “~/Desktop/Python_Tutorials/diveintopython/py” folder
2. Go to Window –> Preferences –> PyDev –> Interpreters –> Python Interpreter to remove your Python Interpreter setting (reason being is because PyDev unable to auto refresh any updates made to any System PythonPath)
3. Add in the Interpreter with the same details as before (this will refresh your Python Interpreter setting with updates made to your PythonPath)
4. Finally since your “~/Desktop/Python_Tutorials/diveintopython/py” folder not a standard PythonPath, you will need to add it in. There are two ways to do it

a. As per what David German suggested. However this only applicable for the particular projects you are in b. Add in “~/Desktop/Python_Tutorials/diveintopython/py” into a new PythonPath under Window –> Preferences –> PyDev –> Interpreters –> Python Interpreter –> Libraries subtab –> NewFolder

Hope it helps.

I had some issues importing additional libraries, after trying to resolve the problem, by understanding PYTHONPATH, Interpreter, and Grammar I found that I did everything write but the problems continue. After that, I just add a new empty line in the files that had the import errors and saved them and the error was resolved.

KD.py

class A:
a=10;

KD2.py 
from com.jbk.KD import A;
class B:
  b=120;

aa=A();
print(aa.a)

THIS works perfectly file for me

Another example is

main.py
=======
from com.jbk.scenarios.objectcreation.settings import _init
from com.jbk.scenarios.objectcreation.subfile import stuff

_init();
stuff();

settings.py
==========
def _init():
print("kiran")


subfile.py
==========
def stuff():
print("asasas")