Python 无法保存名称前有斜杠的文件

Question

with open('/tests/testDict.pickle','wb') as fp: print 'to terminal'

上面的内容有什么问题，让我抓狂并给出了以下内容：

---------------------------------------------------------------------------
IOError                                   Traceback (most recent call last)
<ipython-input-17-fe5a4a9f361c> in <module>()
----> 1 with open('/tests/testDict.pickle','wb') as fp: print 'to terminal'

IOError: [Errno 2] No such file or directory: '/tests/testDict.pickle'

如果前面没有斜杠，我会得到：

with open('tests/testDict.pickle','wb') as fp: print 'to terminal'
to terminal

我在 OS X:

中有以下目录结构

$ ls
cp1.py           cp1_pdftest.jpg  random/          tests/

Answer 1

当你有前导斜杠时，它表示绝对路径。也就是说，除非您在系统的根目录 (/) 中有一个名为 'tests' 的目录，否则这将不起作用。

Answer 2

/只是根目录，也许你应该试试./

Answer 3

"/tests/" 上的前导斜杠强制路径为绝对路径，即使您正在执行

os.path.join(os.getcwd(), "/tests/")

所以你需要做

os.path.join(os.getcwd(), "tests/")

来自 os.path.join 文档：

os.path.join(path, *paths)

Join one or more path components intelligently. The return value is the concatenation of path and any members of *paths with exactly one directory separator (os.sep) following each non-empty part except the last, meaning that the result will only end in a separator if the last part is empty. If a component is an absolute path, all previous components are thrown away and joining continues from the absolute path component.

Python 无法保存名称前有斜杠的文件

Python Unable to save file with slash in front of name

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ipython