🌐 Mailman 3 May 2004 - Tutor - python.org

Output to a printer
by Bob Fleming Dec. 29, 2004

Dec. 29, 2004

I am learning Python on a Windows system (Win95). All of the tutorials, documentation, and a book that I am studying all assume printing to the console (stdout). I live in the real world and will need to print out to my laser printer or other device. How do I modify the print or write statements, or redirect stdout, to print to a printer? Thank you, Bob Fleming robertf(a)eskimo.com

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re: Re: [Tutor] gui tks and encodings
by tomikaze＠enternet.hu June 2, 2004

June 2, 2004

ok you are right, i have finally found a few lines about mark_set and the insertion point being a mark on the page too, that Glen told me. it seems like reading the modul thirtyfour times is not enough in some special cases. :) but could you tell me why do i always get 0, 0, 0, 0 for print text_widget.bbox('insert') ? text_widget.update_idletasks() is done before.. do i use it the wrong way? thanks tm

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list comprehension question
by Tom Musgrove June 1, 2004

June 1, 2004

Hi, I'm writing some code that takes two meshes, an original, and an altered mesh. Finds the added and deleted edges/vertices. And then modifiys a list of targets that were applied to the original mesh and modifies them to have the same behavior on the altered mesh. (Ie the targets are mesh deformations for specified vertices, but the new mesh might have new vertices that need to be interpolated, or vertices that have been deleted, or moved, etc.) I have two lists of keys that I have from creating edge dictionaries for the altered and original mesh, then using list comprehension to find the unique edges. giving, for instance, the following. ListAUniqueEdges = {(1,5), (2,6), (3,7), (8,9)} ListBUniqueEdges = {(2,7), (3,5), (1,6), (10,11)} I need to create two dictionaries from the above, showing how the edges from lista relate to those in listb and vice versa, ie the resulting Dict would be DictA = {(1,5): {(1,6), (3,5)}, (2,6): {(2,7), (1,6)}, (3,7): {(3,5), (2,7)}, (8,9):{}} is there some elegant way to do this, I think it should be doable via list comprehension, but for some reason I can't think of the solution right now, and the power of google isn't helping... Thanks, Tom M. _________________________________________________________________ Best Restaurant Giveaway Ever! Vote for your favorites for a chance to win $1 million! http://local.msn.com/special/giveaway.asp

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Time help
by MBussell＠aol.com May 31, 2004

May 31, 2004

I am playing with the Time Module, and was attempt to write a script which would tell me when a specific time was reached. I am using the integer number of seconds since the epoch. This is what I have: def test(): now = 1086017720.0 current = time.time() print current while now<>current: current = time.time() print current print "now is acheived!" The problem is the count continues past the specific time. Thanks, MB

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object question
by Kim Branson May 31, 2004

May 31, 2004

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all, i'm having a go at using classes. below is my attempt (a long time ago i posted a question to this list and received a great reply from Karl suggesting an object based approach, i filed it away to understand at a later date :) This object sets up some dictionaries, and these are then filled with the update method. This changes to the appropriate directory at reads in a results file. this file looks like: PK= 5.38 Qual= 1.58 PMF= -75.04 PMF_rb= -75.04 SMoG= -85.09 SMoG_H= - - -8.51 ChemScore= -29.01 Clash= 0.00 Int= 0.00 DockNRG= -13.07 AutoDock= -15.71 my problem is in the matching done in the update method. the assignment of m=self.score_lines.search(line) does not produce a object with <type 'NoneType'> and prints as None. I've tested with the test code i've attached. I think its a scope issue as it seems to work when its not in the object? Can someone explain this to me. cheers Kim - - -----begin test code---- import re, string, os path = os.getcwd() results_path= path + "/dock" os.chdir("%s" % results_path) data =open("results_summary", 'r') data= data.readlines() score_lines =re.compile("""PK= (?P<score>.*) Qual= (?P<qual>.*) PMF= (?P<pmf>.*)\ PMF_rb= (?P<pmf_rb>.*) SMoG= (?P<smog>.*) SMoG_H= (?P<smog_h>.*) ChemScore= (?P<chemscore>.*)\ Clash= (?P<clash>.*) Int= (?P<int>.*) DockNRG= (?P<docknrg>.*) AutoDock= (?P<autodock>.*)""") for line in data: #print line m=score_lines.search(line) #print type(m) print m.group("score") print m for grp, val in m.groupdict().items(): print grp,val - - ---- end test code--- */ ***********Begin Code****** */ import string, os, re #we get the data from the SCORER outout class scorer_values: score_lines =re.compile("""PK= (?P<score>.*) Qual= (?P<qual>.*) PMF= (?P<pmf>.*)\ PMF_rb= (?P<pmf_rb>.*) SMoG= (?P<smog>.*) SMoG_H= (?P<smog_h>.*) ChemScore= (?P<chemscore>.*)\ Clash= (?P<clash>.*) Int= (?P<int>.*) DockNRG= (?P<docknrg>.*) AutoDock= (?P<autodock>.*)""") def __init__(self): self.counter=0; #make the dictionaries self.tables=dict([(name,{}) for name in ["score","qual","pmf","pmf_rb","smog","smog_h",\ "chemscore","clash","int","docknrg","autodock"]]) #def __str__(self): #s = [] #for key in self.tables: #s.append(key + '\n') #s.append("-" * len(key) + '\n') #items =self.tables[key].items() #items.sort() #for key, val in items: #s.append(str(key) + '->' + val + "\n") #return ''.join(s) def _pull(self,program="dock"): os.chdir("%s"% program) self.results=open("results_summary", 'r') return self.results.readlines() def update(self,program="dock"): for line in (self._pull(program)): m=self.score_lines.search(line) print type(m) print m if m: for grp,val in m.groupdict().items(): tables=self.tables[grp] tables[self.counter]=val print self.tables self.counter += 1 dock_values=scorer_values() dock_values.update("dock") print dock_values Kim Branson Diffraction and Theory CSIRO Health Sciences and Nutrition 343 Royal Parade, Parkville Melbourne Ph +613 9662 7136 kim.branson(a)csiro.au Kim Branson Diffraction and Theory CSIRO Health Sciences and Nutrition 343 Royal Parade, Parkville Melbourne Ph +613 9662 7136 kim.branson(a)csiro.au -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (Darwin) iD8DBQFAuwsjer2hmGbHcokRAvszAJ9Ws1Vcbc43OKDodbJjam03By+GHwCffdjV F4VKwwXqeFkQVkS+fmzO1Ro= =q1TV -----END PGP SIGNATURE-----

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(no subject)
by MailingList May 31, 2004

May 31, 2004

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Peaks detection
by Marco May 31, 2004

May 31, 2004

Hey all, i am tryin to write in python a peak detection algorithm to use on spectra taken from a data analyser in a lab. The spectrum comes in a text file with 2 columns, one with the channel number and the other one with number of counts for that channel. Making the calibration to the energy is not a problem, except for the fact that the algorithm _should_ recognize the peaks of the spectrum (those that have a fair gaussian form) and notate the centroid of the gaussian. The problem is: i can't find an algorithm except for a labview "procedure" on the net. Once found the "how" implementing it in python shouldn't be that hard :) so the question is: Anyone has a source for an algorithm of that kind? Any suggestion? thank you all, marco -- "Caro, ho un... anticipo sul ciclo!"

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Question about stdin/stdout
by Bob Heasman May 31, 2004

May 31, 2004

Hi, I have just started programming with Python using the book and disk supplied by Michael Dawson, and am rather overawed at the questions and answers that I have seen. I am a Radio Amateur and I have a need for a program that will, when the program sees one of a few call signs, it will send an instruction to the parallel port to make one of the pins go high. I will have a series of relays which will operate and rotate my beam towards that particular station. Now I have devised a means of getting the "password" program to recognise the following line and activate the appropriate command, as follows:.... #! /usr/bin/python # Password # Demonstrates the if structure # Antenna direction changer # Bob Heasman 25/04/04 ******************************* print "\tWelcome to System Security Inc." print "_where security is our middle name" password = raw_input("\n\nEnter your password: ") if password == "[PTCPACTOR - 19 - UA6ADV-0]": print "Activate pin 1" if password == "F3KT": print "Activate pin 2" raw_input ("\n\nPress the Enter key to exit.") ************************************* This works well as far as it goes, but it is reliant on having stdin and stdout being the keyboard and the screen. I have read through the book and see that he goes on to demonstrate how to write games which rely on exactly the same stdin/stdout. I realise that "Activate pin 1" won't work, but I can sort that out. I just want to know about stdin/stdout. What I want to do is get the program to read a screen display (or I can get Linux to save this display to a file using the "tail -f" command) or file, and when it recognises the line with the call sign "UA6ADV" (or one of the other call signs) it will then send a cmd to the parallel port, ttyS0, to make one of the pins go high. So this uses a file as "stdin", and "stdout" is a pin on the parallel port.Can someone give me some pointers as to how to do this, or if necessary, point me to a book or a web site where I can find this info. I suppose I could wade through the book in the hope that I find something to do this, but I really would like to get this program working asap, and going through the book will take me forever. I have been a bit verbose I am afraid, but I thought rather do that then be confusing by leaving out info. Thanks....Bob

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How to save user data?
by acidblue May 31, 2004

May 31, 2004

I have a textctrl box for usr input, do I use raw_input and assign a variable in order to save the information? Using wxPython2.4 Python 2.3 My code thus far: from wxPython.wx import * from wxPython.lib.maskededit import Field, wxMaskedTextCtrl from wxPython.lib.maskededit import autoformats import datetime def create(parent): return Blue49(parent) [wxID_BLUE49, wxID_BLUE49FLOWERTIMEBOX, wxID_BLUE49PANEL1, wxID_BLUE49STARTDATEBOX, wxID_BLUE49STARTSEEDSTEXTBOX, wxID_BLUE49STATICTEXT1, ] = map(lambda _init_ctrls: wxNewId(), range(6)) class Blue49(wxFrame): def _init_ctrls(self, prnt): # generated method, don't edit wxFrame.__init__(self, id=wxID_BLUE49, name='Blue49', parent=prnt, pos=wxPoint(168, 148), size=wxSize(600, 427), style=wxDEFAULT_FRAME_STYLE, title='Blue49') self.SetClientSize(wxSize(592, 393)) self.panel1 = wxPanel(id=wxID_BLUE49PANEL1, name='panel1', parent=self, pos=wxPoint(0, 0), size=wxSize(592, 393), style=wxTAB_TRAVERSAL) self.StartDateBox = wxMaskedTextCtrl(id=wxID_BLUE49STARTDATEBOX, name='StartDateBox', parent=self.panel1, pos=wxPoint(192, 48), size=wxSize(79, 21), style=0, value=' / / ') self.StartDateBox.SetMask('XX/XX/XXXX') self.StartDateBox.SetAutoformat('') self.StartDateBox.SetDatestyle('MDY') self.StartDateBox.SetFormatcodes('') self.StartDateBox.SetDescription('') self.StartDateBox.SetExcludeChars('') self.StartDateBox.SetValidRegex('') self.StartSeedsTextbox = wxStaticText(id=wxID_BLUE49STARTSEEDSTEXTBOX, label='Enter a date for starting seeds', name='StartSeedsTextbox', parent=self.panel1, pos=wxPoint(40, 56), size=wxSize(141, 13), style=0) self.FlowerTimebox = wxMaskedTextCtrl(id=wxID_BLUE49FLOWERTIMEBOX, name='FlowerTimebox', parent=self.panel1, pos=wxPoint(248, 80), size=wxSize(24, 21), style=0, value='') self.FlowerTimebox.SetMask('XX') self.FlowerTimebox.SetAutoformat('') self.FlowerTimebox.SetDatestyle('MDY') self.FlowerTimebox.SetFormatcodes('') self.FlowerTimebox.SetDescription('') self.FlowerTimebox.SetExcludeChars('') self.FlowerTimebox.SetValidRegex('') self.staticText1 = wxStaticText(id=wxID_BLUE49STATICTEXT1, label='Enter days for flower period.(max-99)', name='staticText1', parent=self.panel1, pos=wxPoint(40, 88), size=wxSize(171, 13), style=0) def __init__(self, parent): self._init_ctrls(parent)

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[Tutor] Re: Hello new to python and the mailing list, need some help
by K J May 30, 2004

May 30, 2004

Thank you to all that help me on that. I got it to write seperate lines with out useing any loops. Thanks for telling my about the upper case thing I did not know that. Here is the code I made: name = raw_input("What is your name? ") age = raw_input ("What is your age? ") sex = raw_input ("What is your sex? ") player = open("name.plr", 'w') player.write (name+'\n') player.write (age+'\n') player.write (sex+'\n') player.close() player = open("name.plr", 'r') line_a = player.readline() line_b = player.readline() line_c = player.readline() player.close() print line_a print line_b print line_c The output is like this Kevin 27 Male Is there a way to bring the lines closer to gether? Sorry for all the questions I still have not had time to go buy a Python book, I have only been reading what I can on the internet and most of the tutorials don't explain this stuff. Thanks again, Kevin ----- Original Message ----- From: "Alan Gauld" <alan.gauld(a)blueyonder.co.uk> To: "K J" <game(a)gameweave.com>; <tutor(a)python.org> Sent: Sunday, May 30, 2004 12:49 PM Subject: Re: [Tutor] Hello new to python and the mailing list, need some help > Hi Kevin, welcome to Python. > > There are several points to mke, only one of which > actually resolves your problem :-) > > > ...I want to write to a seperate line so that it will > > print on the screen like this: > > > here is the code that I did: > > NAME = raw_input("What is your name? ") > > AGE = raw_input ("What is your age? ") > > SEX = raw_input ("What is your sex? ") > > First, by convention all uppercase letters are usually > reserved for fixed values or constants. Its just a convention > but a pretty well respected one. A mnore normal convention > for variable names is to keep then lower case and capitalize > any secondary words within the name., like this: > > aLongName > > It doesn't change how the code works but makes it easier > for other people to read your code. > > > player = open("name.plr", 'w') > > player.write (NAME) > > You are writing the data but the data has no newline at the end. > You need to add it. Unfortunately python files have a readline() > method but no writeline() - for reasons which have always puzzled me! > > To add the newline we use the character sequence: > > '\n' > > so to write to the file you need to do: > > player.write(NAME+'\n') > > > player = open("name.plr", 'r') > > line = player.readline() > > player.close() > > This will only read one line of input, if you need to read the > others you will either have to add multiple lines like the above > or use a loop - which you may not have come across yet in whatever > tutor you are following! > > HTH, > > Alan G > Author of the Learn to Program web tutor > http://www.freenetpages.co.uk/hp/alan.gauld/tutor2 > > >

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