🌐 Mailman 3 November 2003 - Tutor - python.org

Sample9.py and Sample9.pyc & seting path to Python open files ...
by David Dec. 12, 2003

Dec. 12, 2003

Hello ... 1.) I noticed, that after I have imported some random module (in this case, module I made) there appear an additional file in Python\Saves directory, where my modules are stored ... The module I imported was Sample9.py (green icon), process it. and just after last line the new file Sample9.pyc appeared (more or less red icon) ... It has also different content compare to "original" file, some sort of "program language" I do not recognize ... Sample9.py print "tadej" multiplier = input("Which multiplier do you want? Pick a number ") for j in range(1,13): print "%d x %d = %d" % (j, multiplier, j * multiplier) Sample9.pyc ;ň ~ć˛?c @ sE d GHe d Z x- e d d D] Z d e e e e f GHq! Wd S( s tadejs, Which multiplier do you want? Pick a number i i s %d x %d = %dN( s inputs multipliers ranges j( s js multiplier( ( s/ D:\Program Files\Python\Lib\idlelib\Saves\gg.pys ? s What is that *.pyc file is ?? What is it used for (just assuming something has changed in it during processing, compare to "original" .py file) ?? 2.) Just before writting this mail, when I was trying to make some more complex "read/write" file operatons, I always get an error: IOError [Errno 2] No such file or directory: 'Sample.py' A also tryed with sys.path.append("D:\\PROGRAM~1\Python) function, which worked fine previous time, when Python didn't "know" the right path, and there was IOError again. Further, to be more certain I also tryed sys.path.append("D:\\PROGRAM~1\Lib\idlelib\Saves\) - the directory, where I store my sample files, ... and there was the same error again. Please tell me, what am I doing wrong ?? 3.) And only one question directly releated to programming: I finished with Alan Gauld's tutorial (than you again, Alan - it's really the best option for non-programmer to start with), so to continue, I am learning from 4 new tutorials (not at the same time), one from techiwarehouse.com, second is Dive into Python, third is "An Informal Introduction to Python" from www.python.org and fourth is Josh Cogliati's "Python for Non-Programmers" So in the one from techiwarehouse.com, there is an explanation of so-called Logical operators: and, or, and not. I do not understand explanation of and operator: Firts it says: For example, x > 0 and x < 10 is true only if x is greater than 0 and less than 10. and then: Strictly speaking, the operands of the logical operators should be boolean expressions, but Python is not very strict. Any nonzero number is interpreted as "true." >>> x = 5 >>> x and 1 1 >>> y = 0 >>> y and 1 0 So, how do we get 1 and 0 here ?? Probably they are not meaning "true" or "false", cause when I typed ... >>> x = 1 >>> x and 2 2 ... it gives value 2 !! I assume it is releated to "Any nonzero number is interpreted as "true.", but I can't get it 100 % ... Thanks for any answer, Tadey

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program doesnt work
by Udz Dec. 8, 2003

Dec. 8, 2003

well, after i fixed my little mistake (thanx G.Rodriguez, I made a stupid mistake.), i ran py2exe, and it appeared to work right, it built the dir that it was supposed to, and compiled the .dll and .exe file. the only problem is, the program doesnt work. The window just kinda pops up, then disappears without doing anything. i know that the solution is sitting right in front of me, but i can't figure it out. was i supposed to alter the code somehow to qualify it for compilation (or whatever py2exe does)? yes, i'm stuck, so if anyone could help me that'd be great. thanx to any and everyone that tries to help, Udz --------------------------------- Do you Yahoo!? Free Pop-Up Blocker - Get it now

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Python script to automatically send mails (running as a cron job in cygwin/linux)
by Alok Rai Dec. 8, 2003

Dec. 8, 2003

Hi, I need to write a python script which would run through a cron job in cygwin/linux. I need the script to authenticate itself and send the mail. The script needs to read my account info(host, login and password) from some encrypted file. Please provide pointers regarding this, especially how I can store my login information in a secure, encrypted format and have my script read it. Regards, Alok.

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Re: IDE
by Mike Hansen Dec. 2, 2003

Dec. 2, 2003

I've been reading The Pragmatic Programmer.(I think someone on this list mentioned it, so I fired it up in O'Reilly's Safari.) It strongly recommends finding a powerful editor to help make you more productive. IMHO, VIM & EMACS are probably the top two. There's a holy war between fans of each editor. I think they are both powerful tools. If you don't like one, try the other. You'll probably need to invest a few days to get used to the one you choose to learn, but it sounds like you can be much more productive once you get over the learning curve. I tried emacs 3 times over the years, and it never clicked with me. YMMV. When I came across the part about editors in The Pragmatic Programmer, I decided to take a look at VIM. So far, it's making more sense to me than EMACS. Both EMACS and VIM are very powerful. They try to keep your hands on the keyboard instead of the mouse which should result in you being more productive. There's lots of cool features in both editors that also help in productivity. I recommend that you try EMACS or VIM. It'll help you in Python and nearly any other programming language you decide to use. BTW, I believe that development on XEMACS has stopped, and most of the features that were in XEMACS are now in EMACS. "A surprising number of people we've met use the Windows notepad utility to edit their source code. This is like using a teaspoon as a shovel" - The Pragmatic Programmer Mike > > Subject: > Re: [Tutor] IDE > From: > john fleming <fleming.j(a)comcast.net> > Date: > Tue, 25 Nov 2003 21:06:45 -0800 > To: > Okan Asik <okana(a)doruk.net.tr> > > > Okan Asik wrote: > >> What's the most common IDE you people using while writing your own >> programs ? >> > I have used emacs in linux and windows. If you want to try it in > windows I suggest using Xemacs because it comes with python mode > configured. But I learned a few things about wxPython by using boa > constructor. It has an editing mode that lists properties that can be > changed and you can edit your program by changing things there, and > watching the result on your app. The seperate files for PyApp and > Pyframe portions of the program I found confusing though and prefer to > write the main framework of a program with one file until I get a > better understanding of where to put things. > > John F > >

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special character ( ñ )
by clickron＠webtv.net Dec. 1, 2003

Dec. 1, 2003

I have python 2.2.2. Is there an easy way to type ñ (n with tilde) or other special characters?. Ron A

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inp. outp. & variable - dictionary difference ...
by Tadey & Ivan Dec. 1, 2003

Dec. 1, 2003

Hello ... I was having some problems lately with my hotmail email storage, so I probably deleted all new mails I got, or I even didn't get none (I had full box for some time too), so don't be mad if I am sending this mail second time, but I would really like to see any answer, if there was some (if there was, no need to put it on mailing list, just please forward me the answer, if it is possible) ... I just noticed two "interesting" issues (probably releated only to my configuration): 1.) First I found out, after trying few times, closing Python, and opening it again, that sometimes it open file (for reading/writting), and sometimes just don't, arbitrary, meaning that its not like I couldn't open the file always I try, therefore the most logical conclusion would be - I miss-spelled the code, but no: I 100 % tryed with identical input, I double, triple-checked the "code" ... I use the method below, from Alan's tutorial (don't know, probably the only one method for read/write files) ... I also checked files (on Alan's suggestion), if the are accidentally set as "read-only", I even unchecked "archive" (but that wouldn't explain why I could open them yesteday) ... with no benefit - as I said sometimes just can, and sometimes just can't (I second case I get "no such file or directory: 'somename.txt'" error message) !! >>> inp = open("lll.txt","r") # made both files just before opening Python ... >>> outp = open("ggg","w") ... for line in inp.readlines(): # for intendation here, I am not sure if its right, cause I couldn't check it ... ... outp.write(line) # before sending this mail, because of all mentioned above ... >>> inp.close() >>> outp.close() So, I was surely surprised yesterday, when (after "restarting" Python) trying to open the very same file, it was normally opened with the same method, with same text (input): >>> inp = open("lll.txt","r") >>> outp = open("ggg","w") ... but today after closing Python, shuting down PC (sleeping 8 hours) and trying to do the same thing again - there was the same (familiar) - "no such file or directory: 'somename.txt'" error message !! I have also tryed what Danny suggested, some other method to open file, and typed: >>> inp = open("D:/Program Files/Python/Lib/idlelib/Saves/ggg.txt") ... and the file was opened normally !! ... but in the very next line (of course after typing inp.close() ), with inp = open("somefile.txt","r") method: >>> inp = open("lll.txt","r") ... the was "no such file or directory" error message again !! 2.) Second about reading/writing from/into file, I noticed (yesterday, when I had luck and I could open file), that Python doesn't want to write from one file to another, which is non-empty (though maybe also just in my case) and also in file, which was already modified (something written in), changed from outside Python, during current session (of course, I used inp(close) before modified it) and even if this file was modified, and I later deleted that "new added" text (again maybe just in my case). 2.) Then I would really like to know, if I open some file, already process some line, and then miss-spell something, and some error message appears - do I need to close both (inp and out) files, and start from the beginning, or could I continue from the line before that error message ?? 3.) And as the last question, Alan.G's answer on my question about "difference between different types of brackets", was: "{} indicate a dictionary. ... One item in the pair is the lookup key, the other the return value." I am just curious - where is some "elemental" difference between dictionary (in practical use) and simple variable, cause "One item in the pair is the lookup key, the other the return value." - more or less resemble on variable deffiniton ... Example: instance = "Actual usage of class" (here we have variable and its actual value, stored in some location in RAM) ... so here one item is also some sort of "lookup key", and the other "the return value" ... Sorry, I really have more "theoretical" questions now on the beginning of learning how to programm, but it (answers here on Tutor list) really help me to imagine how everything works. P.S., I save all the answers I get, and you couldn't imagine (or you probably do, but I just said so, cause it sounds nice), how helpfull is having you answers saved somewhere, and when something is not so clear, just open those files, and see what was doing wrong ... Thank you all, Tadey

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python mailing list
by Az Dec. 1, 2003

Dec. 1, 2003

python mailing list

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help about thread programming
by Hameed Khan Nov. 30, 2003

Nov. 30, 2003

Hi, i try to consult python documentation for thread and threading module. i look at few scripts. but didn't get any idea of threading. i am really fedup of it now. and i dont want to give up. i will try to search on google. but if any one of you can write a simple threading script with explanation then it will be very valuable for me. and i will try to learn from it. waiting for your replies and advices. Thanks, Hameed Khan __________________________________ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/

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Toolkit for Tkinter?
by Terry Carroll Nov. 30, 2003

Nov. 30, 2003

I want to do more in the way of GUI programming, and Tkinter kind of frustrates me in the level of detail it requires. I've heard about Wax, both on this list and at its web site <http://zephyrfalcon.org/moin.cgi/Wax>, but that's an interface into wxPython. I'd like to stay in Tkinter, rather than learning a whole new GUI toolkit like wxPython. I don't use Python professionally, this is just for my own use for my occasional programming at home, so I'm looking for a no-cost option, being a cheap bastard. So, does anyone know of anything comparable to Wax for Tkinter? (Happy Thanksgiving to the USAians on the list.) -- Terry Carroll Santa Clara, CA carroll(a)tjc.com

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Python game - robot
by Leung Cris Nov. 29, 2003

Nov. 29, 2003

I'm 3/4 through programming this game - a player in the middle, robots chase you. Player touch robot, player dies. Robot touch each other, they die. But I got stuck to the part where they "teach" you how to make multiple robots. They said use an empty list, but I simply don't get it. This is from the livewire package :www.livewires.org.uk/python . Worksheet 5- robot. _________________________________________________________________ 在您的行動裝置上傳送接收 Hotmail 郵件，請移至: http://zh-asiasms.mobile.msn.com

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