Michael Horie(Ins) > Hi
Rhett Dobson > Hi, was SSH'd in from home and got the message
Michael Horie(Ins) > How is the assignment going?
Rhett Dobson > Just wondering about the format, I was checking the tst_expected folder and saw some error messages
Rhett Dobson > is the marking script looking for exactly those, or can we enter our own?
Michael Horie(Ins) > The marking script is looking for exactly those messages
Rhett Dobson > k. log3 is an error that says "Error:  Found matching entry outside BEGIN-END pair.  Terminating..." can you clarify what this means?
Rhett Dobson > is it like an else case for the other errors?
Michael Horie(Ins) > Yes, just a second.  I'll copy in the relevant parts...
Michael Horie(Ins) > Can't find the line right now
Michael Horie(Ins) > Basically,
Michael Horie(Ins) > these log files have duplicated ENDs or BEGINs
Michael Horie(Ins) > Whenever that happens, you can just thrown an
Michael Horie(Ins) > exception, and exit the program
Rhett Dobson > the other errors seem to cover extra ENDs or BEGINs
Michael Horie(Ins) > Let me just 2x check
Michael Horie(Ins) > I wonder if
Michael Horie(Ins) > there is data between and END and a BEGIN
Rhett Dobson > it seems to me error #3 is an else case for other, weirder errors
Rhett Dobson > that's a good example
Michael Horie(Ins) > still checking...sorry
Michael Horie(Ins) > found it I think
Michael Horie(Ins) > line 1260
Michael Horie(Ins) > there are two records
Michael Horie(Ins) > jumbled together
Michael Horie(Ins) > so there are two dates, times, stationnames
Michael Horie(Ins) > no END or BEGIN so that's why the error is generated
Rhett Dobson > is that in one of the test input logs?
Michael Horie(Ins) > Yes, log3
Michael Horie(Ins) > If you use vi
Michael Horie(Ins) > type 1260G
Michael Horie(Ins) > that get's you to line 1260
Johnny Wang >> has entered the room.
Rhett Dobson > already found it in nano >_>
Michael Horie(Ins) > nano will do, too!
Rhett Dobson > okay, next question, it looks like the "sort by" parameter is the first line in the log
Rhett Dobson > so the script uses one argument on the command line (the input file)?
Michael Horie(Ins) > actually
Michael Horie(Ins) > just a sec; running two chats concurrently
Michael Horie(Ins) > for this assignment,
Michael Horie(Ins) > everything is piped in via stdin
Michael Horie(Ins) > so no command line argument is required
Johnny Wang > will you be on campus tomorrow mr horie ?
Rhett Dobson > oh, so that means > or < are used
Michael Horie(Ins) > To Johnny: Sorry, schedule is too full; but I am available via e-mail or the occasional chat.
Michael Horie(Ins) > To Rhett: Yes
Johnny Wang > its ok. thanks
Gurleen Tiwana >> has entered the room.
Gurleen Tiwana >> has left the room.
Gurleen Tiwana >> has entered the room.
Michael Horie(Ins) > To Gurleen: to type, enter text into the lowest box on the screen
Michael Horie(Ins) > and press the "enter" key or send button
Gurleen Tiwana > i m stuck at assignment, unable to  append
Michael Horie(Ins) > Does it not append at all, or append in an unexpected manner
Rhett Dobson > append is a method for list objects. make sure you're using a list, not a dictionary?
Gurleen Tiwana > i mean the date , time ,... are not printed in an expected manner
Gurleen Tiwana > yes i m
Michael Horie(Ins) > Could you copy in a line of output text, please (not the source code, just the output)
Johnny Wang >> has left the room.
Michael Horie(Ins) > For that matter, make sure that you are appending valid data
Michael Horie(Ins) > For example, group(0) should cause problems because it's 1 indexed
Gurleen Tiwana > i tried
Gurleen Tiwana > didn't work
Michael Horie(Ins) > ok, just a sec
Michael Horie(Ins) > So is your code following this pattern:
Michael Horie(Ins) > phone = re.compile(r"^TEL;.*:(.*)$")
line = sys.stdin.readline()
while line != "":
       result = phone.search(line)
       if result != None:
               print result.group(1)
Michael Horie(Ins) > oops
Michael Horie(Ins) > phone = re.compile(r"^TEL;.*:(.*)$")
line = sys.stdin.readline()
while line != "":
       result = phone.search(line)
       if result != None:
               print result.group(1)
Michael Horie(Ins) > phone = re.compile(r"^TEL;.*:(.*)$")
Michael Horie(Ins) > line = sys.stdin.readline()
Michael Horie(Ins) > while line != "":
Michael Horie(Ins) >        result = phone.search(line)
Michael Horie(Ins) >        if result != None:
Michael Horie(Ins) >                print result.group(1)
Gurleen Tiwana > i sent you my code in ur email
Michael Horie(Ins) > Did you get my reply?
Gurleen Tiwana > that mite help u to see where i m wrong
Gurleen Tiwana > noo
Michael Horie(Ins) > Has it arrived in your mailbox?
Gurleen Tiwana > no...    :S
Michael Horie(Ins) > ok, I'll switch over to a00.  watch your a00 terminal
Gurleen Tiwana > wenevr i put group(1), it shows me error that  no group exists
Rhett Dobson > uhoh, I have 3 open
Michael Horie(Ins) > Sorry Rhett, I was talking to Gurleen
Rhett Dobson > just being silly ;)
Michael Horie(Ins) > I need a bigger screen myself.  I have about 10 windows open
Rhett Dobson > I'm having a bit of trouble harnessing stdin though
Michael Horie(Ins) > To Rhett: Ok, just a sec
Michael Horie(Ins) > To Gurleen: No change on your screen ?
Michael Horie(Ins) > To Rhett: What stdin issue?
Michael Horie(Ins) > To Gurleen: In regards to group(1), make sure that the pattern your are matching against is using parentheses
Michael Horie(Ins) > FOr example "PHON(E)=(/*)"
Rhett Dobson > I'm just not sure what the syntax or usage is like. I'm trying to base my assignment off of the code from lab4 but it used a file input from the command line
Kieran Sroba >> has entered the room.
Michael Horie(Ins) > group(1) = "E", group(2) = phone number
Gurleen Tiwana > ooooh i will give it a shot
Michael Horie(Ins) > To Rhett: you mean in terms of getting it into python?
Michael Horie(Ins) > ie from the command line
Michael Horie(Ins) > or how to read from stdin within python
Michael Horie(Ins) > cat tst_input/log1 | python wtrack.py
Michael Horie(Ins) > for the former
Michael Horie(Ins) > sys.stdin.readline()
Michael Horie(Ins) > for the latter
Kieran Sroba >> has left the room.
Rhett Dobson > what was sys.std.readline() return? a string? I can't seem to print it or assign it to a variable
Michael Horie(Ins) > should return a string
Michael Horie(Ins) > try just putting print in front
Rhett Dobson > maybe i'm just not familiar enough with python syntax, but I get errors with that >_>
Michael Horie(Ins) > can you tell me what the error message says?
Rhett Dobson > with the function in quotes I get
Rhett Dobson > > import: unable to open X server `'.
> import: unable to open X server `'.
> ./wtrack.py: line 7: print: command not found
Rhett Dobson > without quotes it's
Michael Horie(Ins) > X server ... are you within Python or on the command line
Rhett Dobson > ./wtrack.py: line 7: syntax error near unexpected token `('
./wtrack.py: line 7: `print sys.stdin.readline()'
Rhett Dobson > I run these from the command line
Rhett Dobson > oh wait I noticed I have forgotten to include a path to python
Gurleen Tiwana > use #! / bin/usr/python
Rhett Dobson > isn't it /usr/bin/python
Michael Horie(Ins) > what is the file name called?
Michael Horie(Ins) > Since I am online right now, I can actually look at your file
Rhett Dobson > looks like I just got it to work
Michael Horie(Ins) > Good!
Rhett Dobson > kind of embarrassing, skipping the first and most important line >_>;
Michael Horie(Ins) > Happens to me as well
Michael Horie(Ins) > The best way to code is in a team
Michael Horie(Ins) > Catches more errors
Michael Horie(Ins) > We'll actually talk about that later in the course
Rhett Dobson > it prints a blank line afterward. I guess I won't worry about it though
Michael Horie(Ins) > blank line could be a problem
Michael Horie(Ins) > can break pattern match
Michael Horie(Ins) > to get rid of it, use strip()
Michael Horie(Ins) > "\n\n".strip()
Michael Horie(Ins) > will remove trailing newlines from the
Michael Horie(Ins) > preceding string
Michael Horie(Ins) > ANy other questions?
Michael Horie(Ins) > I'm getting hungry :)
Michael Horie(Ins) > Need some supper
Rhett Dobson > how would I target my stdin with that? put it on the same line as the print statement?
Rhett Dobson > (me too actually)
Michael Horie(Ins) > do you mean how to call it?  not sure what you mean by target
Michael Horie(Ins) > oh
Michael Horie(Ins) > line = sys...
Michael Horie(Ins) > then line.strip()
Michael Horie(Ins) > or
Michael Horie(Ins) > sys.stdin.readline().strip("\n")
Rhett Dobson > it runs but hasn't removed the blank lines. maybe I'll try the other method
Michael Horie(Ins) > print also add a \n
Michael Horie(Ins) > try print "Hello" ,
Michael Horie(Ins) > the comma swallows the \n that the print issues
Michael Horie(Ins) > the strip removes the \n that was consumed after reading in the first line
Rhett Dobson > second method worked. comma is also a good tip
David Minkley >> has entered the room.
Kieran Sroba >> has entered the room.
David Minkley > Dr. Horie, what is the easiest way to insert characters into a string?
Michael Horie(Ins) > "a" + "second part" + "c"
Michael Horie(Ins) > using the plus sign
Rhett Dobson > what does strip() with no arguments do?
David Minkley > I mean a string which already exists, ie: Inserting a 'p' into suer to make 'super'
Michael Horie(Ins) > default is to get rid of newline
Kieran Sroba > oki i dont understant the parnthesis to match and group indexed to one it keeps telling me that it cant find group one
Michael Horie(Ins) > just a sec
Michael Horie(Ins) > To David: I think strings are immutable.  Not 100% sure, but pretty sure.  So you would have to split the old string and then reassemble it
Michael Horie(Ins) > Ti Kieran: I'll upload an example
David Minkley > thanks
Michael Horie(Ins) > upload button broken
Michael Horie(Ins) > ok, line by line
Michael Horie(Ins) > phone = re.compile(r"^TEL.*:(.*)$")
Michael Horie(Ins) > so the () are used to declare groups
Michael Horie(Ins) > here the characters following the : are placed into a group
Michael Horie(Ins) > line = sys.stdin.readline()
Michael Horie(Ins) > result = phone.search(line)
Michael Horie(Ins) > so here the regular expression is applied to the string line
Michael Horie(Ins) > if result != None:
Michael Horie(Ins) > print result.group(1)
Michael Horie(Ins) > and here the regular expression retrieves the first (and only) set of characters surrounded by parentheses
Michael Horie(Ins) > so "h(e)(l)lo" would match e to group 1 and l t group 2
Michael Horie(Ins) > ...back soon...really hungry now, so looking for something edible around my desk
Kieran Sroba > that makes sense and i got that to work but it wont append to my list
Rhett Dobson > afk 4 food myself
Michael Horie(Ins) > any error messages
Michael Horie(Ins) > or just unexpected results
Kieran Sroba > unexplained results... it will append my temp and my station name but not mthe date or the time
David Minkley > how do you turn the keys of a dictionary into a list?
Michael Horie(Ins) > To David: dict.keys() should return a list
Michael Horie(Ins) > TO Kieran: What is your file name
Michael Horie(Ins) > I can take a look at it online
Kieran Sroba > its wtrack.py
Michael Horie(Ins) > ok, just a sec
David Minkley > thanks
Michael Horie(Ins) > To David: You are welcom
Michael Horie(Ins) > To Kieran: Could you do a :w
Michael Horie(Ins) > To save the file?
Michael Horie(Ins) > I think I am looking at an old version
Kieran Sroba > did that work?
Michael Horie(Ins) > 17 lines?
Kieran Sroba > no its way more than that
Michael Horie(Ins) > Could you save & quit, pls?
Michael Horie(Ins) > Maybe that will save it to file
Michael Horie(Ins) > yes
Michael Horie(Ins) > just a sec
Michael Horie(Ins) > make sure there are no group(0) lines left
Michael Horie(Ins) > just a sec
Kieran Sroba > there are group (0) but only for begin and end because i dont have a group one in those variables
Michael Horie(Ins) > looking at your code now
Michael Horie(Ins) > try setting currEntry to [] only when you come across a begin
Michael Horie(Ins) > also, you probably don't want to assign a record to the dictionary until you come across an end
Michael Horie(Ins) > end = END WRECORD I mean
Kieran Sroba > but wont that chnage my indexing for my list
Michael Horie(Ins) > the catch is that the order is not guaranteed
Michael Horie(Ins) > so I see what you mean
Michael Horie(Ins) > you could try reserving slots
Michael Horie(Ins) > ie station name always goes into slot 1
Michael Horie(Ins) > or use a different data structure
Kieran Sroba > but the order of the key's change not the keys themselves, so how do i set my key to always be the station name then append to my list
Michael Horie(Ins) > not sure i follow.  so if you read in "belmont" "feb 2" 10:00 59% humidity
Michael Horie(Ins) > you want to do...
Kieran Sroba > i want to set belmont as a key in the dictionary that has a list containing date time and number
Michael Horie(Ins) > right, except that the date time & number may come after the station name, so
Michael Horie(Ins) > you should not
Michael Horie(Ins) > set a dictionary entry until you have
Michael Horie(Ins) > all relevant data
Michael Horie(Ins) > one thing that can be done as well
Kieran Sroba > but either way if i put them into a list then set its key then put it into my dictionary it would still work right?
Michael Horie(Ins) > is to keep track of the key in a separate variable
David Minkley > I took out all /'s, :'s and _
David Minkley > 's from my date_time combo.  Then sorted.  How can I put them back in?
Michael Horie(Ins) > just a sec
Michael Horie(Ins) > to kieran: yes, that order is correct
Michael Horie(Ins) > to david: i just left date & time as is
Michael Horie(Ins) > you can use feb_02_10:00 as a key
Michael Horie(Ins) > no need to do a numeric sort
Michael Horie(Ins) > oops, I guess its 2008/02/02 instead of feb 2
Michael Horie(Ins) > same idea, though
David Minkley > so we can assume the records will be given to us in date/time order?
Michael Horie(Ins) > no, it could be time then date
Michael Horie(Ins) > but once you have the two, you can put them together as
Michael Horie(Ins) > a sort key
David Minkley > sort key
David Minkley > ?
Michael Horie(Ins) > oops
Michael Horie(Ins) > just replace that with "and sort them"
David Minkley > okay, so sort can still handle it properly with the other characters included?
Michael Horie(Ins) > yes
David Minkley > well, that makes things easier... thanks!
Michael Horie(Ins) > youre welcome
David Ferguson >> has entered the room.
Michael Horie(Ins) > back soon
David Ferguson > Michael, I can't remember if the assignment is due Monday or Tuesday.
Michael Horie(Ins) > Tuesday
David Ferguson > Thank you
Michael Horie(Ins) > you're welcome
Michael Horie(Ins) > anybody else with a final question?
Michael Horie(Ins) > ok, I'm signing off.  I will check e-mail again tomorrow morning, and be online for a chat around 1pm tomorrow
Michael Horie(Ins) >> has left the room.
Kieran Sroba >> has left the room.