[英]Does tmpdir in pytest create a file only when we write to it?
When I use fp = tmpdir.join("hello.txt")
in pytest, does pytest actually create a file in my temp directory or it creates only when I write fp.write("hello")
?当我在 pytest 中使用
fp = tmpdir.join("hello.txt")
时,pytest 是否实际上在我的临时目录中创建了一个文件,或者它仅在我编写fp.write("hello")
时创建?
No, pytest
will not create the file until you actually write to it.不,
pytest
在您实际写入文件之前不会创建该文件。 Under the hood, as mentioned in the documentation, tmpdir
uses py.path .在幕后,如文档中所述,
tmpdir
使用py.path 。 When you call join it will lazily get the new path, meaning it does not exist until you actually write something to it.当您调用join时,它会懒惰地获取新路径,这意味着它不存在,直到您实际向其写入内容。
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