python 3.2 中缺少 readline 和 readlines 方法？

Question

Did they remove file.readline() and file.readlines() from python 3.2? If yes what did they replace it with?

Answer 1

While there is no file type any more in Python 3.x, the various types in the io module that replace the old file type still support f.readline() and f.readlines() . You actually don't need those methods, though, since they can be substituted by next(f) and list(f) .

Answer 2

Here is the documentation (well, tutorial) for Python 3.2. readline and readlines are still a part of Python.

Answer 3

No they did not.

f = open("file", "r")
f.readlines()

is working for me, Python 3.2.

EDIT: it produces an io object (not file).

Answer 4

I had problems, too. However, when I included an

import readline

at the top of my script, everything worked fine. It appears that it has to be imported explicitly now.