python - 无法导入 'ast' : Flask installation on Angstrom (Beaglebone black)

Question

尝试在我的 beaglebone black (Cloud9 GNOME Image 2013.09.04) 上安装 Flask 时，遇到模块 ast 的导入错误(安装 Werkzeug 模块)。我有 Python 2.7.3 版本，所以这个内置函数不应该已经存在了吗？

这是日志:

Downloading/unpacking Flask
  Downloading Flask-0.10.1.tar.gz (544kB): 544kB downloaded
  Running setup.py egg_info for package Flask

    warning: no files found matching '*' under directory 'tests'
    warning: no previously-included files matching '*.pyc' found under directory 'docs'
    warning: no previously-included files matching '*.pyo' found under directory 'docs'
    warning: no previously-included files matching '*.pyc' found under directory 'tests'
    warning: no previously-included files matching '*.pyo' found under directory 'tests'
    warning: no previously-included files matching '*.pyc' found under directory 'examples'
    warning: no previously-included files matching '*.pyo' found under directory 'examples'
    no previously-included directories found matching 'docs/_build'
    no previously-included directories found matching 'docs/_themes/.git'
Downloading/unpacking Werkzeug>=0.7 (from Flask)
  Downloading Werkzeug-0.11.2.tar.gz (1.2MB): 1.2MB downloaded
  Running setup.py egg_info for package Werkzeug
    Traceback (most recent call last):
      File "<string>", line 16, in <module>
      File "/tmp/pip-build-root/Werkzeug/setup.py", line 56, in <module>
        import ast
    ImportError: No module named ast
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):

  File "<string>", line 16, in <module>

  File "/tmp/pip-build-root/Werkzeug/setup.py", line 56, in <module>

    import ast

ImportError: No module named ast

我尝试在此板上以常规方式导入 ast 但无法这样做。很可能它根本不存在，但我的 python 和 python-dev 被报告为最新的。

帮助!

Answer 1

Angstrom BeagleBone 图像有一个奇怪的、有点破损的 Python 2.7 IIRC 构建，BeagleBoard.org 不再支持它们。您真的应该升级到由 BeagleBoard.org ( http://beagleboard.org/latest-images ) 维护和支持的当前 Debian 镜像之一 - 我已经在这些镜像上毫无问题地使用了 Flask。