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I have an anaconda install for Python. When I fire up python and attempt to import packages this happens.

Python 3.7.6 (default, Jan  8 2020, 13:42:34) 
[Clang 4.0.1 (tags/RELEASE_401/final)] :: Anaconda, Inc. on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>> import pandas as pd
Error: You must specify two command line arguments

This information might be useful

(base) MAC:Fri Feb 14:09:32:~> python --version
Python 3.7.6
(base) MAC:Fri Feb 14:09:32:~> conda --version
conda 4.8.2
(base) MAC:Fri Feb 14:09:32:~> 

Has anyone else seen this?

  • Do you have a file in your current directory named pandas.py? That would mask the real module. – jordanm Feb 14 at 16:01
  • I ran find and can only find pandas.py in the anaconda subtree. – ncmathsadist Feb 14 at 18:37
  • @jordanm Thanks; see my answer below. This is an ugly cautionary tale. – ncmathsadist Feb 14 at 19:50
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This is what happened. IN my home directory I had a program named copy.py, which was an example I use for teaching fileIO; it copies a file. It takes two command-line arguments and errors out if the user fails to supply them.

Evidently, there is a module named copy that pandas uses. My copy.py got seen prior to the system's and it created this mess.

Thanks, @jordanm, you provided the hint that helped me to see this.

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