Python's tail -f implementation for remote files

[asdf]

Basically what i want to do is to read a file
that is being constantly appended to but which
is located on a remote server.
I found this for doing BASH's tail -f in python:

import os
tailoutputfile = os.popen('tail -f syslog')
while 1:
line = tailoutputfile.readline()
if len(line)==0:   # change the termination condition 
break
process_line(line)

and it works great. But not sure how to use this with
ssh command to connect to remote machine.

Any tips?
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Dynamic HTML from Python Script

[asdf]

I have a python script whose output i want to dynamically display
on a webpage which will be hosted using Apache. How do I do that?


thanks
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Re: Dynamic HTML from Python Script

[asdf]

> Well, there's a few ways you could approach it.
> 
> You could create a cgi program from your script - this is probably the
> solution you're looking for.
> 

Output from the script does come up very often. There is a new output 
every 10 secs and it's possible that the script might be run indefinitely.
Basically I want all that output displayed in a web browser

> You could have the script run periodically and create a static html file
> in the webroot... this would be acceptable, maybe preferable, if the
> output from your script doesn't change frequently.
> 
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Re: Dynamic HTML from Python Script

[asdf]

On Wed, 11 Jun 2008 11:20:48 +1000, Aidan wrote:

> asdf wrote:
>>> Well, there's a few ways you could approach it.
>>>
>>> You could create a cgi program from your script - this is probably the
>>> solution you're looking for.
>>>
>>>
>> Output from the script does come up very often. There is a new output
>> every 10 secs and it's possible that the script might be run
>> indefinitely. Basically I want all that output displayed in a web
>> browser
> 
> Well, in that case you could simply append the new output to a static
> file every 10 seconds, or whenever there is new output.  That way, you
> just need to refresh the static file in your browser to see updates...
> Given what I understand of your situation, that's how I'd do it.
> 
The problem with this is that browser would have to be refreshed manually
every 10 seconds. Unless there is a way to set this in the script itself.


> A constantly running CGI app is probably not the best idea, given
> timeouts and other such constraints you might run into.
> 
> 
>>> You could have the script run periodically and create a static html
>>> file in the webroot... this would be acceptable, maybe preferable, if
>>> the output from your script doesn't change frequently.
>>>

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matplotlib question

[asdf]

basically I need to plot a graph of data vs time. However when i use
matplotlib the hr:min tick marks come out very close together and
appear jumbled. So 12:00 comes out very close to 12:30 for example.
There are two things I would like to do. First, is to increase
the horizontal dimension of the graph. So basically increase the
horizontal number of pixels. The data will always be from 
midnight to midnight it's just that i want it stretched out
more horizontally. Also, how do i specify that i only want hourly
tickmarks. So under the x-axis i only want to see 12:00 1:00 etc.

thanks
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2Q's: How to autocreate instance of class;How to check for membership in a class

[asdf]

So I'm writing a script which will create several instances of User()
class. I want each instance to be named after the login name
of a user. I don't know beforehand how many users the script will
have to create or how they are named. Right now I've created a dictionary
of usernames as keys and objects themselves as values. It works,
but is very unwieldy, because every time I need to access a value from
within an object I have to do something like dict-user[x].value.
Is there a way of automatically naming objects from variable names.
So for example if I know that var1=jsmith. Can I somehow do
var1=User(). This obviously won't work because I tried this. It'll just
create var1 of type User.

My second question is how can I check if object is a member of a class.
so let's say I create a=User(), b=User()...
Can I do something similar to 
if x.Users()==TRUE:
print "user already created"

Right now I'm doing this using try-except which works
but I'm looking for something cleaner. 

thanks for all the replies.
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Parse specific text in email body to CSV file

[dpw . asdf]

I have been searching all over for a solution to this. I am new to
Python, so I'm a little lost. Any pointers would be a great help. I
have a couple hundred emails that contain data I would like to
incorporate into a database or CSV file. I want to search the email
for specific text.

The emails basically look like this:



random text _important text:_15648 random text random text random text
random text
random text random text random text _important text:_15493 random text
random text
random text random text _important text:_11674 random text random text
random text
===Date: Wednesday March 5, 2008
name1: 15name5: 14

name2: 18name6: 105

name3: 64name7: 2

name4: 24name8: 13



I want information like "name1: 15" to be placed into the CSV with the
name "name1" and the value "15". The same goes for the date and
"_important text:_15493".

I would like to use this CSV or database to plot a graph with the
data.

Thanks!
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