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Make IOBase (and hence all other classes in io.py) use ABCMeta as its metaclass,

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so you can use their class .register() method to register virtual subclasses.
This commit is contained in:
Guido van Rossum 2007-08-22 18:14:10 +00:00
parent bfc672b169
commit b7f136e73e
1 changed files with 2 additions and 1 deletions
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3
Lib/io.py
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@ -31,6 +31,7 @@ __all__ = ["BlockingIOError", "open", "IOBase", "RawIOBase", "FileIO",
"BufferedRandom", "TextIOBase", "TextIOWrapper"] "BufferedRandom", "TextIOBase", "TextIOWrapper"]
import os import os
import abc
import sys import sys
import codecs import codecs
import _fileio import _fileio
@ -178,7 +179,7 @@ class UnsupportedOperation(ValueError, IOError):
pass pass
class IOBase: class IOBase(metaclass=abc.ABCMeta):
"""Base class for all I/O classes. """Base class for all I/O classes.