无法运行 scons 出现导入错误 [英] Unable to runs scons getting import error

问题描述

我已经安装了 scons 2.3.2 和 python 2.4.

I have installed scons 2.3.2 and have python 2.4.

当我运行 scons 时，我看到以下错误:

When I run scons, I am seeing the following error:

scons
Import failed. Unable to find SCons files in:
  /usr/bin/../engine
  /usr/bin/scons-local-2.3.2
  /usr/bin/scons-local
  /usr/lib/scons-2.3.2
  /usr/lib/scons-2.3.2
  /usr/local/lib/scons-2.3.2
  /usr/lib/python2.4/site-packages/scons-2.3.2
  /usr/lib/python2.4/site-packages/scons-2.3.2
  /usr/local/lib/python2.4/site-packages/scons-2.3.2
  /usr/lib64/scons-2.3.2
  /usr/lib/scons
  /usr/lib/scons
  /usr/local/lib/scons
  /usr/lib/python2.4/site-packages/scons
  /usr/lib/python2.4/site-packages/scons
  /usr/local/lib/python2.4/site-packages/scons
  /usr/lib64/scons
Traceback (most recent call last):
  File "/usr/bin/scons", line 190, in ?
    import SCons.Script
  File "/usr/lib/scons/SCons/Script/__init__.py", line 76, in ?
    import SCons.Environment
  File "/usr/lib/scons/SCons/Environment.py", line 48, in ?
    import SCons.Defaults
  File "/usr/lib/scons/SCons/Defaults.py", line 52, in ?
    import SCons.Tool
  File "/usr/lib/scons/SCons/Tool/__init__.py", line 50, in ?
    import SCons.Scanner.C
  File "/usr/lib/scons/SCons/Scanner/C.py", line 36, in ?
    import SCons.cpp
  File "/usr/lib/scons/SCons/cpp.py", line 398
    p = self.stack[-1] if self.stack else self.default_table
                        ^
SyntaxError: invalid syntax

我做了一个发现，发现/usr/lib/scons 中存在 SCons.我不知道为什么 scons 不能把它捡起来.

I did a find and found that SCons is present in /usr/lib/scons. I am not sure why scons is not able to pick it up.

我错过了什么?

推荐答案

问题(从回溯的底部)是语法错误:

The problem (from the bottom of the traceback) is a Syntax error:

    p = self.stack[-1] if self.stack else self.default_table
                        ^
SyntaxError: invalid syntax

这是因为您运行的 Python 版本不支持条件表达式:

This is because you are running a version of Python that doesn't support conditional expressions:

在 2.5 中添加了对此语法的支持，请参阅文档

Support for this syntax was added in 2.5, see the docs

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