BUG: can't set up dev environment -- Import Error: C extensions: ... #34280
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joooeey
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Needs Triage
5 tasks
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Are you getting any output from |
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Yes I did get lots of output but that went out of my Anaconda Prompt buffer: Here's the last lines in the buffer that I got from |
Do you get the same error when, from the anaconda prompt (with pythonand then, in the Python REPL, import pandas? |
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@MarcoGorelli I get a similar error when running Python directly in Anaconda Prompt: |
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@joooeey in your last output, can you run |
Running from |
I just noticed that of the two Tracebacks given in the problem description (and copied straight above), the lower one has illogical grammar. So the suggestion to rebuild the C extensions in the exception text may be intended for a different For context the relevant snippet from The upper of the two Tracebacks (the original exception) just points to a missing module |
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I just tried running |
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I solved this by updating the Visual Studio Build Tools 2019 from 15.4.0 to 16.6.0 and running: |
bashtage
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the
Needs Triage
Upgrading the Build Tools to VS 2019 resolves all the issues. |
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I'm on Ubuntu and installed via conda |
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I have checked that this issue has not already been reported.
I have confirmed this bug exists on the latest version of pandas.
(optional) I have confirmed this bug exists on the master branch of pandas.
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Code Sample, a copy-pastable example
pulled out from #33821 (the main symptom was that
import pandasfailed (see problem description):I just re-built the pandas-dev environment altogether:
I ran:
conda env remove --name pandas-devThe
pandas-joooeeyfolder was still there so I deleted it.Then I ran in Git Bash:
And then the following commands in Anaconda Prompt (as given by
doskey /history:None of these threw errors. However, I still get an error when I
import pandasin Spyder (I made sure to open a fresh console in Spyder):I also tried re-basing master from upstream in Git Bash:
Console output:
After that,
import pandasstill results in the same C extension error as given above.The only thing I left untouched was the Visual Studio Build Tools 2019.
I have the following build tools installed/missing:
Installation details
MSBuild Tools
Provides the tools required to build MSBuild-based applications.
C++ build tools
Included
C++ Build Tools core features
C++ 2019 Redistributable Update
Optional
MSVC v142 - VS 2019 C++ x64/x86 build tools (v14.25)
Windows 10 SDK (10.0.18362.0)
C++ CMake tools for Windows
Testing tools core features - Build Tools
C++ AddressSanitizer (Experimental)
C++ ATL for latest v142 build tools (x86 & x64)
C++ MFC for latest v142 build tools (x86 & x64)
C++/CLI support for v142 build tools (14.25)
C++ Modules for v142 build tools (x64/x86 – experimental)
C++ Clang tools for Windows (9.0.0 - x64/x86)
Windows 10 SDK (10.0.17763.0)
Windows 10 SDK (10.0.17134.0)
Windows 10 SDK (10.0.16299.0)
MSVC v141 - VS 2017 C++ x64/x86 build tools (v14.16)
MSVC v140 - VS 2015 C++ build tools (v14.00)
Problem description
import pandasfails on mymasterbranch:Output of
pd.show_versions()N/A -- cannot even import Pandas.
The fork from pandas-dev was made in April 2020.
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