IntelliJ IDEA issue: xarray & pyparsing exception on import - intellij-idea

Question

This has something to do with the IntelliJ IDEA 2017.1.1 IDE. I do not get the following issue when executing my code via the command line.
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Python version: 3.6.1
xarray version: 0.9.6
pandas version: 0.20.3
numpy version: 1.12.1
I, for the first time, would like to use xarray.
I imported the module (no problem here) and then, without even using the module, ran my code. For example:
import xarray as xr
def something():
print("doing something...")
something()
This immediately throws an exception when I run it:
Exception ignored in: at 0x05A287B0>
Traceback (most recent call last): File "C:\Program Files
(x86)\Python36-32\lib\site-packages\pyparsing.py", line 160, in
_generatorType = type((y for y in range(1))) SystemError: error return without exception set
If I delete the import xarray as xr and rerun the code, I get no exception.
From the exception message, it looks like something called pyparsing.py
Any ideas?

Answer 1

pyparsing is probably installed as a dependency from some other package. I have run the pyparsing unit tests on both Python 3.6.1 and 3.6.2 (as well as most other popular Python versions back to 2.6) without any error.
I suspect that something in your environment is defining range to be something other than the normal builtin range method, and this is then causing the pyparsing code to fail.
I will fix this in pyparsing, to replace range(1) with just an empty list, which should give the same results for pyparsing, but without the susceptibility to being overwritten by a monkeypatch to range.
In the meantime, try explicitly importing pyparsing before importing xarray, or anything else for that matter. A simple import pyparsing should do.