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POException while handling generator.send() in try...except block
primarykey
Id
11995454
data
AcceptedAnswerId
12002011
AnswerCount
2
ClosedDate
CommentCount
5
CommunityOwnedDate
CreationDate
2012-08-16T21:08:14.837
FavoriteCount
0
LastActivityDate
2012-08-17T08:03:32.563
LastEditDate
2012-08-17T04:22:12.230
LastEditorUserId
939986
OwnerUserId
1602384
ParentId
0
PostTypeId
1
Score
1
ViewCount
274
LastEditorDisplayName
text
Body
<pre><code>filename = 'tempfile' def tail(filename): fd = open(filename) while True: line = fd.readline() if not line: continue else: if filename != 'uh': yield line else: print 'Returning f to close the file' yield fd try: genObj = tail(filename) valfromgen= genObj.next() while valfromgen: print valfromgen valfromgen= genObj.next() except: traceback.print_exc() try: fd_Got_Back = genObj.send('uh') fd_Got_Back.close() except: traceback.print_exc() </code></pre> <hr> Intention of the code: I have opened the file in the generator function only and not outside it, but, I want to close that file outside the generator function by using 'send' probably. What I am trying to do: Replicating <code>tail -f</code> from unix. How I am trying to do: <ol> <li>Open a tempfile in read mode.</li> <li>If the tempfile has 1 new line written in it (which I'll keep on writing manually and saving tempfile using notepad), yield the newly written line.</li> </ol> Problem: The problem is that I'm trying to check how I can close the opened tempfile from this python code if I press <kbd>Ctrl</kbd> + <kbd>C</kbd> (i.e. SIGTERM) when this Python code runs in command prompt. In order to emulate this, I have opened the tempfile in the <code>tail</code> function, and whenever there is an exception (which will be raised by the system when I press <kbd>Ctrl</kbd> + <kbd>C</kbd>), the control should go in the 1st except. Then, from here, I'm trying to send a value <code>uh</code> to the generator function <code>tail</code>, so that it should yield the file descriptor of the opened file which I can use to close the opened tempfile. PS: I expect a solution where I have opened the file in the generator function only and not outside it.
Tags
<python><try-catch><generator><yield><except>
Title
Exception while handling generator.send() in try...except block
singulars
PostAcceptedAnswerId
1. PO
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 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USSantosh Kumar
UserOwnerUserId
1. USGodMan
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1. This table or related slice is empty.
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1. This table or related slice is empty.
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1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
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 PTAnswer
2. PO
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 PTAnswer
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1. VO
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 POException while handling generator.send() in try...except block
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2. VO
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 POException while handling generator.send() in try...except block
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3. VO
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 POException while handling generator.send() in try...except block
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