Mac High Sierra系统Python2.7.14安装rpy2失败求助

First, let's break down the error you ran into—here's the exact output you saw:

Collecting rpy2
Using cached rpy2-2.9.2.tar.gz
Complete output from command python setup.py egg_info:
rpy2 is no longer supporting Python < 3. Consider using an older rpy2 release when using an older Python release. #

Command "python setup.py egg_info" failed with error code 1 in /private/v...

The core issue here is straightforward: the latest versions of rpy2 (starting from 2.9.x) dropped support for Python 2 entirely. When you run pip install rpy2 without specifying a version, pip tries to grab the newest available release, which isn't compatible with your Python 2.7.14.

Here's how to fix it: #

• Install the last stable rpy2 version that supports Python 2.7. That's version 2.8.6, the final release in the 2.8.x branch which maintained Python 2 compatibility.
• Run this command in your terminal:

  pip install rpy2==2.8.6
  

Quick troubleshooting note: #

Make sure you have R installed on your Mac and that it's accessible in your system PATH. If you installed R via Homebrew, you might need to set the R_HOME environment variable temporarily if the installer can't find R automatically. For example:

export R_HOME=/usr/local/Cellar/r/[your-R-version-number]/lib/R
pip install rpy2==2.8.6

Just replace [your-R-version-number] with the actual version of R you have installed (like 4.0.5 or whatever shows up in /usr/local/Cellar/r/).

内容的提问来源于stack exchange，提问作者AngryR11