Python raw_input following sys.stdin.read() throws EOFError

Question

a similar question has been asked before, but the answers suggested a workaround which is not applicable to my situation.

An email message is piped from mutt to a script, and is read from STDIN:

message = sys.stdin.read()
# message is parsed and URLs are printed as a list to choose from...
selected_index = raw_input('Which URL to open?')

I understand that raw_input() will get the EOF left by read(), but is there a way to 'reset' STDIN?

Mac OS X (10.7). Alex Martelli suggested re-opening STDIN here, but that does not seem to work for me. — janeden
– janeden, Commented Nov 7, 2011 at 9:26
I just confirmed that the very same exception is thrown on a GNU/Linux system (CentOS). When I manually feed STDIN (terminating the input with CTRL-D), the script works fine, but calling ./script.py < message produces the problem described above. — janeden
– janeden, Commented Nov 7, 2011 at 10:48
OS X had similar problems in the past, but they were supposed to be fixed in Python 2.7 (I'm on 2.7.1). — janeden
– janeden, Commented Nov 7, 2011 at 16:47

unutbu · Accepted Answer · 2011-11-07 10:43:18Z

6

Have you tried this:

message = sys.stdin.read()
sys.stdin = open('/dev/tty')
selected_index = raw_input('Which URL to open?')

This works on Linux; maybe it will work for OSX too.

answered Nov 7, 2011 at 10:43

unutbu

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3 Comments

janeden Over a year ago

Unfortunately, it does not work (this is the solution proposed for the question I linked to in my first post). In the modified form, the script awaits input before arriving at the raw_input function, and the error occurs once I hit return.

janeden Over a year ago

This is odd – I must have done something wrong before: It works now. Thanks!

user67416 Over a year ago

Nice hack! Linux FTW

NullUserException · Accepted Answer · 2011-11-12 17:15:00Z

0

Try to reset STDIN using sys.stdin.seek(0)

Reference: http://docs.python.org/library/fileinput.html

edited Nov 12, 2011 at 17:15

NullUserException

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answered Nov 7, 2011 at 9:25

krishnang

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1 Comment

janeden Over a year ago

That helps a bit – the EOFError exception is gone, but the raw_input is now ignored entirely (i.e. the script proceeds without waiting for user input).

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