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<DIV><FONT size=2>Hi gang, a strange one uncovered by a student of my
tutorial.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>If you create the following example program, lets call it
intest.py:</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>####### intest.py #####</FONT></DIV>
<DIV>inp = raw_input()<BR>while inp != '':<BR> print
inp<BR> inp = raw_input()</DIV>
<DIV>#######################</DIV>
<DIV> </DIV>
<DIV><FONT size=2>And the following data file</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>-------- Not part of in.txt -----</FONT></DIV>
<DIV><FONT size=2>6</FONT></DIV>
<DIV><FONT size=2>7</FONT></DIV>
<DIV><FONT size=2>8</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>
<DIV><FONT size=2>-------- Not part of in.txt -----</FONT></DIV>
<DIV> </DIV>
<DIV>Then run Python from a DOS prompt like so:</DIV>
<DIV> </DIV>
<DIV>C:\somepath> pythopn intest.py < in.txt</DIV>
<DIV> </DIV>
<DIV>The file content is echo'd as expected.</DIV>
<DIV> </DIV>
<DIV>But if you start it:</DIV>
<DIV> </DIV>
<DIV>C:\somepath> intest.py < in.txt</DIV>
<DIV> </DIV>
<DIV>There is no output! </DIV>
<DIV>In fact, I get an error:</DIV>
<DIV> </DIV>
<DIV>E:\PROJECTS\Python>intest.py < in.txt<BR>Traceback (most recent call
last):<BR> File "E:\PROJECTS\Python\intest.py", line 2, in
?<BR> inp = raw_input()<BR>EOFError: EOF when reading a
line</DIV>
<DIV> </DIV>
<DIV>And if you run</DIV>
<DIV> </DIV>
<DIV>C:\somepath> intest.py</DIV>
<DIV> </DIV>
<DIV>You get the interactive version as expected.</DIV>
<DIV> </DIV>
<DIV>Why the difference with the redirected file? I am confused.</DIV>
<DIV>What am I missing? XP seems to have a different runtime </DIV>
<DIV>environment depending on how the script is run... </DIV>
<DIV>BTW This also happens under cygwin.</DIV>
<DIV> </DIV></FONT></DIV>
<DIV><FONT size=2>Alan G<BR>Author of the Learn to Program web tutor<BR><A
href="http://www.freenetpages.co.uk/hp/alan.gauld">http://www.freenetpages.co.uk/hp/alan.gauld</A></FONT></DIV></BODY></HTML>