如何从 python 代码设置 PATH？ [复制]答案

【问题标题】：How to set PATH from python code? [duplicate]如何从 python 代码设置 PATH？ [复制]
【发布时间】：2013-11-02 22:37:58
【问题描述】：

我尝试从 python 脚本设置 ORACLE_HOME 路径如下，但它不起作用，知道如何设置它吗？

>>> subprocess.call(["export", "ORACLE_HOME="+ORACLE_HOME], env= os.environ)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib64/python2.4/subprocess.py", line 419, in call
    return Popen(*args, **kwargs).wait()
  File "/usr/lib64/python2.4/subprocess.py", line 550, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.4/subprocess.py", line 996, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
>>> subprocess.call(["export", "ORACLE_HOME="+ORACLE_HOME])
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib64/python2.4/subprocess.py", line 419, in call
    return Popen(*args, **kwargs).wait()
  File "/usr/lib64/python2.4/subprocess.py", line 550, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.4/subprocess.py", line 996, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

【问题讨论】：

标签： python subprocess

【解决方案1】：

使用os.environ:

os.environ['ORACLE_HOME'] = 'whatever'

【讨论】：

太好了.. 非常感谢。知道如何附加到现有的 PATH 吗？
@Shashi: os.environ['PATH'] += ':whatever'