如何在Python3环境执行Scons并导入Python3脚本？（v3.0.1.7）

Let’s break down your questions and walk through the solutions step by step:

Specifying Python 3 as the Interpreter for SCons #

The scons -python /usr/bin/python3 syntax isn’t a supported flag in SCons. Instead, the most reliable way to force SCons to use Python 3 is to invoke the Python interpreter directly and pass the SCons entry point to it. Here’s how:

• If SCons is already installed for Python 3, you can run it via Python’s module system:

  /usr/bin/python3 -m scons
  

• If you’re working with a local SCons script or haven’t installed it for Python 3 yet:

  /usr/bin/python3 /path/to/your/scons/install/scons.py
  

Alternatively, if you install SCons using Python 3’s package manager (pip3), the default scons command will automatically use Python 3 (assuming your system PATH prioritizes Python 3’s bin directory).

Building/Installing a Python 3-Compatible SCons v3.0.1.7 #

Since SCons v3.0.1.7 officially supports Python 3.5+, setting up a Python 3-compatible version is straightforward:

Option 1: Install via pip3 (Recommended) #

This is the easiest method. Run the following command to install SCons specifically for your Python 3 environment:

pip3 install scons==3.0.1.7

After installation, the scons command will default to using Python 3.

Option 2: Build from Source #

If you prefer to compile from the source code:

1. Download the source archive for SCons v3.0.1.7 from the official release repository.
2. Extract the archive and navigate to the source directory in your terminal.
3. Run the installation using your target Python 3 interpreter:

   /usr/bin/python3 setup.py install
   

This will build and install SCons using Python 3, ensuring full compatibility.

Verify Your Setup #

To confirm SCons is using Python 3, run:

scons --version

Look for a line in the output like this (showing Python 3.5 or higher):

Python: 3.8.10

Importing Python 3 Scripts in Your SCons Script #

Once SCons is running under Python 3, you can import your Python 3 scripts directly into your SConstruct or SConscript files just like regular Python code:

# In your SConstruct file
import my_python3_script

If your script is in a non-standard directory, add its path to Python’s module search path first:

import sys
sys.path.append("/path/to/your/python3/scripts")
import my_python3_script

内容的提问来源于stack exchange，提问作者Chouettou