尝试多版本Python仍无法导入pandas，DLL加载失败求助

Hey there, let's work through this frustrating pandas DLL error you're hitting. I've seen this exact issue pop up with older Python versions on Windows, so here's what's likely going on and how to fix it:

Common Causes & Solutions #

1. Missing Visual C++ Redistributable Runtime #

The core issue here is almost always a missing required DLL from the Visual C++ runtime. Your Python 3.6 uses MSC v.1900 (Visual Studio 2015 compiler), so you need the matching 32-bit Visual C++ 2015 Redistributable package—even if your Windows is 64-bit, since you're running 32-bit Python.

• Uninstall any 64-bit versions of the VC++ 2015 Redistributable you might have installed.
• Install the 32-bit (x86) Microsoft Visual C++ 2015 Redistributable (make sure it's the 2015 version, not newer ones like 2017/2019—they don't fully substitute for 2015 for older Python builds).

2. Incompatible Pandas Version #

Modern pandas versions dropped support for Python 3.6 a while back (pandas 1.3.x and above require Python 3.7+). If you installed the latest pandas via pip, it's probably a version that doesn't play nice with your Python 3.6 setup.

Fix this by installing a pandas version explicitly compatible with Python 3.6:

# First uninstall the current broken pandas
pip uninstall pandas -y

# Install a compatible stable release (1.1.5 works reliably with Python 3.6)
pip install pandas==1.1.5

You can also try pandas==1.2.5 if 1.1.5 doesn't work, but 1.1.x is more reliable for older Python builds.

3. Corrupted Install Package #

Sometimes pip can download a corrupted installation file, leading to missing or broken DLLs. Force a clean reinstall to rule this out:

pip install pandas==1.1.5 --force-reinstall --no-cache-dir

The --no-cache-dir ensures pip downloads a fresh copy instead of using a cached (possibly corrupted) file.

4. Verify System Path Configuration #

You mentioned you can see window.cp36-win32.pyd in the pandas _libs directory—good, that means the file exists. But Windows might not be able to find its dependent DLLs. A quick check:

• Make sure your Python's Scripts directory and the site-packages/pandas/_libs directory are added to your system's PATH environment variable (this is usually handled automatically by Python installers, but it's worth double-checking).

Final Check #

After trying the above steps, open your Python shell again and run:

import pandas
print(pandas.__version__)

If it imports successfully and shows the version you installed, you're good to go!

内容的提问来源于stack exchange，提问作者JacobIRR