python路径问题？ “python2.5：无法打开文件“dev_appserver.py”：[Errno 2]没有这样的文件或目录”
我将这一行添加到我的 .bashrc （Ubuntu 9.10）中：
export PYTHONPATH=/opt/google_appengine/
然后我在 Ubuntu 上通过 python2.5 运行 dev_appserver，如下所示：
$ python2.5 dev_appserver.py guestbook/
python2.5: can't open file 'dev_appserver.py': [Errno 2] No such file or directory
正如你所看到的，它无法找到 dev_appserver.py 即使它位于我的 /opt/google_appengine/ 目录中。只是为了确保这不是权限问题，我这样做了：
sudo chmod a+rwx dev_appserver.py
为了检查它是否已添加到 python2.5 的系统路径中，我这样做了：
$ python2.5
Python 2.5.5 (r255:77872, Apr 29 2010, 23:59:20)
[GCC 4.4.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> for line in sys.path: print line
...
/usr/local/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg
/opt/google_appengine/demos
/opt/google_appengine
/usr/local/lib/python25.zip
...
该目录显示在这个列表中，所以我不明白为什么它不能当我输入时发现：
$ python2.5 dev_appserver.py guestbook/
我是Python新手，所以我将不胜感激。谢谢。
I added this line to my .bashrc (Ubuntu 9.10):
export PYTHONPATH=/opt/google_appengine/
And then I ran the dev_appserver through python2.5 on Ubuntu like this:
$ python2.5 dev_appserver.py guestbook/
python2.5: can't open file 'dev_appserver.py': [Errno 2] No such file or directory
As you can see, it can't find dev_appserver.py even though it's in my /opt/google_appengine/ directory. Just to make sure it's not a permissions issue I did this:
sudo chmod a+rwx dev_appserver.py
To check whether it's been added to the system path for python2.5 I did this:
$ python2.5
Python 2.5.5 (r255:77872, Apr 29 2010, 23:59:20)
[GCC 4.4.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> for line in sys.path: print line
...
/usr/local/lib/python2.5/site-packages/setuptools-0.6c9-py2.5.egg
/opt/google_appengine/demos
/opt/google_appengine
/usr/local/lib/python25.zip
...
The directory shows up in this list so I don't understand why it can't be found when I type:
$ python2.5 dev_appserver.py guestbook/
I'm new to Python so I would appreciate any help. Thanks.
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Python 在查找您在命令行上命名的脚本时不会遵守 PYTHONPATH。您需要提供 dev_appserver.py 的完整路径，或者修改 dev_appserver.py（和其他工具）的第一行以“
#!/usr/bin/env python2.5”开头。Python doesn't observe PYTHONPATH when looking for a script you name on the command line. You either need to supply the complete path to dev_appserver.py, or modify the first line of dev_appserver.py (and other tools) to start with "
#!/usr/bin/env python2.5".在执行
操作时，传递给可执行文件
python2.5的是CURRENT_PATH/dev_appserver.py。您必须使用
or
来执行，如果
dev_appserver.py有一个 shebang< /a> 对于 Python，即， 正如 Nick Johnson 指出的，#!/usr/bin/env python2.5或#!/usr/bin/env python。除非你有充分的理由，否则不要过度指定 python 版本，使用通用的 python 命令，这是最新版本的符号链接。
When doing
what you are passing to the executable
python2.5isCURRENT_PATH/dev_appserver.py.You have to execute using
or
if
dev_appserver.pyhas a shebang for Python, that is, as Nick Johnson points out,#!/usr/bin/env python2.5or#!/usr/bin/env python.Unless you have a very good reason, don't over specify the python version, use the generic
pythoncommand, that is a symlink to the latest version.