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Diego
Asked: 2018-10-08 02:30:28 +0800 CST

Failing to import pandas in Anjuta "module functions cannot set METH_CLASS or METH_STATIC"

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I have this boilerplate in a minimal Anjuta app that runs. I do not want to install pandas to the system python path so I am using Virtualenv. When I add import pandas as pd I get the following error message.

Not sure if this is Anjuta or Pandas related. I have googled for the error message but nothing instrumental. What do I do? 

#!/home/USERNAME/my_app/bin/python3.6
import gi
gi.require_version('Gtk', '3.0') 
from gi.repository import Gtk, GdkPixbuf, Gdk
import os, sys, gi

...

from shutil import copyfile
import pandas as pd
...

And I get this.

EXECUTING:
/home/USERNAME/my_app/src/my_app.py 
----------------------------------------------
Traceback (most recent call last):
  File "/home/USERNAME/my_app/src/my_app.py", line 35, in <module>
    import pandas as pd
  File "/home/USERNAME/my_app/virtualenv_my_app/my_app/lib/python3.6/site-packages/pandas/__init__.py", line 57, in <module>
    from pandas.io.api import *
  File "/home/USERNAME/my_app/virtualenv_my_app/my_app/lib/python3.6/site-packages/pandas/io/api.py", line 19, in <module>
    from pandas.io.packers import read_msgpack, to_msgpack
  File "/home/USERNAME/my_app/virtualenv_my_app/my_app/lib/python3.6/site-packages/pandas/io/packers.py", line 69, in <module>
    from pandas.util._move import (
ValueError: module functions cannot set METH_CLASS or METH_STATIC

----------------------------------------------
Program exited with errcode (1)
Press the Enter key to close this terminal ...

without the import pandas as pd the program runs just fine...

EXECUTING:
/home/USERNAME/my_app/src/my_app.py 
----------------------------------------------
/home/USERNAME/my_app/test.xlsx
----------------------------------------------
Program exited with errcode (0)
Press the Enter key to close this terminal ...

The same import pandas as pd runs fine if used from a command line python script from the same directory and same virtualenv. Also it runs when called via subprocess.call() from Anjuta runmode.

I am on Ubuntu 18.04 and have installed Anjuta with apt, pandas with pip install pandas.

application-development python virtualenv anjuta

1 Answers

  1. Best Answer

    It seems to be a problem with python 3.6; I had the same problem except I was using matlibplot, numpy and pandas with the following order:

    import numpy as np
import matplotlib.pyplot as plt
import pandas as pd

    And it gave me the same error you got, I rearranged my import order so that it looks like:

    import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

    And now it runs well. See this github issue which is very related: https://github.com/pandas-dev/pandas/issues/23040 . Quoting the last user who posted as today named "AlfTang":

    The problem is fixed it by changing pandas import order as suggested. I suspect that the cause is python3.6. When I used python 3.5.2 everything worked fine.

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