threadio，适合在多线程环境下捕获stdout。
threadio的Python项目详细描述
threadio，适合在多线程环境下捕获stdout。
>>> # standard capture
>>> from threadio import print_to_file
>>> with print_to_file(TextIO()) as fp:
... print("hello world")
...
>>> fp.getvalue()
'hello world\n'
>>> # standard capture (but not stdout, stderr)
>>> from threadio import ThreadIO
>>> fp = ThreadIO(TextIO())
>>> with fp.capture(TextIO()) as fp2:
... print("hello world", file=fp)
... with fp.capture(TextIO()) as fp3:
... print("hello world3", file=fp)
... # not captured fp3, stored fp2
... print("fail captured", file=fp2)
...
>>> fp.getvalue()
''
>>> fp2.getvalue()
'hello world\nfail captured\n'
>>> fp3.getvalue()
'hello world3\n'
>>> # thread example
>>> from threading import Thread
>>> from threadio import print_to_file
>>> th = Thread(target=print, args=("hello world!",))
>>> with print_to_file(TextIO()) as fp:
... th.start()
... th.join()
... print("HAYO!")
...
hello world!
>>> fp.getvalue() # not capture other thread's print
'HAYO!\n'
>>> # note. print_to_xxx function change everything. >>> a = sys.stdout >>> with print_to_file(TextIO()): pass >>> b = sys.stdout >>> a is b False
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