如何在Python中创建假文本文件

How can I create a fake file object in Python that contains text? I'm trying to write unit tests for a method that takes in a file object and retrieves the text via readlines() then do some text manipulation. Please note I can't create an actual file on the file system. The solution has to be compatible with Python 2.7.3.

如何在Python中创建包含文本的伪文件对象？我正在尝试为一个方法编写单元测试，该方法接收文件对象并通过readlines（）检索文本然后进行一些文本操作。请注意我无法在文件系统上创建实际文件。该解决方案必须与Python 2.7.3兼容。

2 个解决方案

#1

This is exactly what StringIO/cStringIO (renamed to io.StringIO in Python 3) is for.

这正是StringIO / cStringIO（在Python 3中重命名为io.StringIO）的用途。

#2

Or you could implement it yourself pretty easily especially since all you need is readlines():

或者你可以很容易地自己实现它，特别是因为你只需要readlines（）：

def FileSpoof:
     def __init__(self,my_text):
         self.my_text = my_text
     def readlines(self):
         return self.my_text.splitlines()

then just call it like:

然后就像这样称呼它：

somefake = FileSpoof("This is a bunch\nOf Text!")
print somefake.readlines()

That said the other answer is probably more correct.

那说另一个答案可能更正确。

#1