Python 错误：OSError: [Errno 22] 无效参数
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Python Error: OSError: [Errno 22] Invalid argument
提问by user2510612
I am using an automation framework and I am getting random error after many iterations which is as follows. Can someone help me understand what this could correspond to !!
我正在使用自动化框架，经过多次迭代后出现随机错误，如下所示。有人可以帮我理解这可能对应什么！！
_os.environ['PATH'] = r'C:\DAL;' + _os.environ['PATH']
File "c:\Python26\lib\os.py", line 420, in __setitem__
putenv(key, item)
OSError: [Errno 22] Invalid argument
Function Call where it fails:
失败的函数调用：
function:
功能：
plugin_xml_file_name = plugin_name
else:
plugin_xml_file_name = plugin_path + "\" + plugin_name
#
_os.environ['PATH'] = r'C:\Intel\DAL;' + _os.environ['PATH']
_os.environ['PATH'] = r'C:\intel\dal;' + _os.environ['PATH']
_os.environ['PATH'] = _lakemore_path + ';' + _os.environ['PATH']
_os.environ['PATH'] = plugin_path + ';' + _os.environ['PATH']
采纳答案by Martijn Pieters
You are creating too long a path and the OS no longer accepts a longer environment variable.
您创建的路径太长，操作系统不再接受更长的环境变量。
Extend the path only once. Test for the presence of the paths you are adding:
只扩展一次路径。测试您添加的路径是否存在：
path = _os.environ['PATH'].split(_os.pathsep)
for extra in (r'C:\Intel\DAL', r'C:\intel\dal', _lakemore_path, plugin_path):
if extra not in path:
_os.environ['PATH'] = _os.pathsep.join(extra, _os.environ['PATH'])
This code only adds new elements if not already present.
此代码仅添加尚不存在的新元素。
回答by Hiep Tran
Add one more "/"in the last "/"of path for example:
open('C:\Python34\book.csv')to open('C:\Python34\\\book.csv')
更添加一个"/"在过去"/"例如路径：
open('C:\Python34\book.csv')以open('C:\Python34\\\book.csv')
回答by Anuj Kumar
Avoid including special characters like \a, \b, \t, \n, \r in your directory path. Instead use double slash whenever neccessary. Like \a, \b, \t, \n, \r.
避免在目录路径中包含特殊字符，如 \a、\b、\t、\n、\r。而是在必要时使用双斜线。像\a、\b、\t、\n、\r。
For example FILEPATH: E:\android\new_dir\raw_data\books\Harry.csvshould be written as
E:\\android\\new_dir\\raw_data\\books\Harry.csv
例如 FILEPATH:E:\android\new_dir\raw_data\books\Harry.csv应该写成
E:\\android\\new_dir\\raw_data\\books\Harry.csv
