PyDev: Unresolved import

问题

I use PyDev in Eclipse and have a custom source path for my Python project: src/main/python/. The path is added to the PythonPath.

Now, i want to use the library pyMIR: https://github.com/jsawruk/pymir, which doesn't has any install script. So I downloaded it and and included it direclty into my project as a Pydev package, the complete path to the pyMIR is: src/main/python/music/pymir.

In the music package (src/main/python/music), now i want to use the library and import it via: from pymir import AudioFile. There appears no error, so class AudioFile is found.

Afterward, I want to read an audio file via: AudioFile.open(path) and there i get the error "Undefined variable from import: open". But when I run the script, it works, no error occurs.

Furthermore, when I look in the pyMIR package, there are also unresolved import errors. For example: from pymir import Frame in the class AudioFile produces the error: "Unresolved import: Frame", when I change it to from music.pymir import Frame, the error disappears, but then I get an error when it runs: "type object 'Frame' has no attribute 'Frame'".

1. What I have to change, another import or how to include a Pydev package?

2. When I make a new project with a standard path "src", then no "unresolved impor" errors appear. Where is the difference to src/main/python? Because I changed the path of source folders to src/main/python.

Thanks in advance.

回答1:

I tried to download and install the pymir package. There is one project structure that works for me:

project/music/
project/music/pymir/
project/music/pymir/AudioFile
project/music/pymir/...
project/music/audio_files/01.wav
project/music/test.py

The test.py:

import numpy
from pymir import AudioFile
filename = "audio_files/01.wav"
print "Opening File: " + filename
audiofile = AudioFile.open(filename)
frames = audiofile.frames(2048, numpy.hamming)
print len(frames)

If I moved 'test.py' out from 'music' package, I haven't found a way to make it work. The reason why the project structure is sensitive and tricky is, in my opinion, the pymir package is not well structured. E.g., the author set module name as "Frame.py" and inside the module a class is named "Frame". Then in "__init__.py", codes are like "from Frame import Frame". And in "AudioFile.py", codes are "from pymir import Frame". I really think the naming and structure of the current pymir is messy. Suggest you use this package carefully

回答2:

add "__init__.py" empty file in base folder location and it works

回答3:

1. unzip the folder pymir to site-packages, make sure the path like

   site-packages\pymir
   site-packages\pymir\AudioFile.py
   site-packages\pymir\Frame.py
   site-packages\pymir\...
   

2. comment the content of the file __init__.py

   #from AudioFile import AudioFile
   #from Frame import Frame
   #from Spectrum import Spectrum
   

3. test it

   import numpy as np
   import matplotlib.pyplot as plt
   from pymir.AudioFile import AudioFile
   
   filename = '../wavs/cxy_6s_mono_16KHz.wav'
   audiofile = AudioFile.open(filename)
   
   plt.plot(audiofile)
   plt.show()
   
   frames = audiofile.frames(2048, np.hamming)
   print(len(frames))
   

来源：https://stackoverflow.com/questions/23237692/pydev-unresolved-import