我可能错过了些什么很愚蠢的东西,但这真的让我在我正在编写的一个更大的项目(c
扩展)上遇到了困难。
为什么在这里print "Hello, World!"
会向sys.stdout
传递None
和额外的\n
?
>>> import sys
>>> class StdOutHook:
... def write(self, text):
... sys.__stdout__.write("stdout hook received text: %s\n" % repr(text))
...
>>> class StdErrHook:
... def write(self, text):
... sys.__stderr__.write("stderr hook received text: %s\n" % repr(text))
...
>>> sys.stdout = StdOutHook()
>>> sys.stderr = StdErrHook()
>>>
>>> def x():
... print "Hello, World!"
...
>>>
>>> print x()
stdout hook received text: 'Hello, World!'
stdout hook received text: '\n'
stdout hook received text: 'None'
stdout hook received text: '\n'
>>>
def x()
是在打印而不是返回......我真是个白痴..谢谢!! - chown