Bad pipe filedescriptor when reading from stdin in python

Duplicate of this question. Vote to close. Consider this at the windows commandline. ``` scriptA.py | scriptB.py ``` In scriptA.py: ``` sys.stdout.write( "hello" ) ``` In scriptB.py: ``` print sys.stdin.read() ``` This generates the following error: ``` c:\> scriptA.py | scriptB.py close failed: [Errno 22] Invalid argument Traceback (most recent call last): File "c:\scriptB.py", line 20, in <module> print sys.stdin.read() IOError: [Errno 9] Bad file descriptor ``` The "close failed" message seems to come from execution of scriptA.py. It doesn't matter if I use sys.stdin.read(), sys.stdin.read(1), sys.stdin.readlines() etc etc. What's wrong? Duplicate of this question. Vote to close.