🌐 Mailman 3 December 2013 - Tutor - python.org

Scripting Calligra sheets with Python
by Jim Byrnes Jan. 31, 2022

Jan. 31, 2022

I am trying to script Calligra Sheets (formerly KSpread) with python. I have gotten some of the included example scripts to run so I know python scripting is running. I found the following snippet on their website: import KSpread sheet = KSpread.view().sheet() # swap text of B5 and C6 t1 = sheet.text("B5") t2 = sheet.text(6,3) sheet.setText("B5", t2) sheet.setText(6, 3, t1) # swap value of D7 and E8 v1 = sheet.value("D7") v2 = sheet.value(8,5) sheet.setValue("D7", v2) sheet.setValue(8, 5, v1) Error: 'str' object has no attribute 'text' File "file:///usr/share/kde4/apps/sheets/scripts/extensions/myswap.py", line 4, in <module> This error message appeared in a dialog box. I've taught myself some Python but I don't understand what is happening here. Shouldn't t1 be a sheet object? What would cause it to be a str instead? Thanks, Jim

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HELP I need help with Python Setup or to reach Marilyn Davis
by carolynn fryer July 12, 2015

July 12, 2015

I am at the point where I am just spinning my wheels. I tried to get help with logging on but so far I am just getting frustrated. I have a problem that I brought up the first night in class but couldn't seem to get help then. Sorry if I am at the point where I am totally frustrated and I need HELP. PLEASE. I did not turn in homework because of the fact that I can not run anything without getting a syntax error. I tried setting up a path for python environment variables and a few other things but I am getting no where. Can you give me some suggestions why I can't run anything. I have windows 7 on my home computer, and windows 8 on my laptop and they are both doing the same thing. So it has to be something I am doing or not doing. I really do not like being behind/late in anything so that is making me even more frustrated. I suppose I am even more frustrated and afraid to ask because I kink of got a slap in the face last time I took a course here and the instructor would not help. But that was a way different situation, I simply could not understand his English and then he told me he did not have any patience. Excuse me but I just about died when he, an INSTRUCTOR told me that. I worked at Stanford for 25 years and to hear an instructor say those words was unthinkable. Anyway you can maybe understand my reluctance to ask for help but I need help. Any suggestions?? When I use one of the computers at school everything works just fine. Except I can not get my own computer to log on when I am there. So again that is why I said it is my system and something in my set up that I don't have. Sorry for the long note, I was just letting out a little frustration. LOL Thx for any suggestions, Carolynn Fryer ps: I know this is not the proper way to get ahold of you but I could not find nor have time to find any other way. The UCSC system is not very user friendly

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Wave module
by Alex Krycek Feb. 12, 2015

Feb. 12, 2015

Hello, I'm trying to join two .wav files with the wave module. But when I try to use wave.open(filename, "rb") I receive the following error: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "F:\PortablePython1.0\lib\wave.py", line 483, in open return Wave_read(f) File "F:\PortablePython1.0\lib\wave.py", line 162, in __init__ self.initfp(f) File "F:\PortablePython1.0\lib\wave.py", line 143, in initfp self._read_fmt_chunk(chunk) File "F:\PortablePython1.0\lib\wave.py", line 264, in _read_fmt_chunk raise Error, 'unknown format: %r' % (wFormatTag,) wave.Error: unknown format: 85 I read somewhere that there are various wave formats, only some supported by Python. Is this true? If so, is there any way I can convert my wave files into a supported kind? Thanks!

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getUncPath(mappedDrive)
by Albert-Jan Roskam Jan. 31, 2014

Jan. 31, 2014

Hi, Is there a function that takes a file path with a mapped drive (z:\blah) and returns the associated UNC path (\\server\share\ding\dang\dong\blah)? I looked in os.path, but it doesn't seem to have this. The link below seems to be a solution (code in the bottom of the page), but I can't install win32com.client in the office :-( Is there any built-in function? http://stackoverflow.com/questions/2244767/python-check-network-map Thanks! Regards, Albert-Jan ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, a fresh water system, and public health, what have the Romans ever done for us? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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ValueError: could not convert string to float: '13,2'
by Pierre Dagenais Jan. 20, 2014

Jan. 20, 2014

Hi, I'm trying to convert a list of strings to float. Unfortunately the numbers are written with a decimal comma instead of a decimal point. What is the best way to replace these commas with decimal points? Do I need to write a function that will iterate over every alphanumeric, replace the comma with a point and then rewrite the list, or is there a better way? Thank you, PierreD.

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arrangement of datafile
by Amrita Kumari Jan. 10, 2014

Jan. 10, 2014

Hi, On 17th Dec. I posted one question, how to arrange datafile in a particular fashion so that I can have only residue no. and chemical shift value of the atom as: 1 H=nil 2 H=8.8500 3 H=8.7530 4 H=7.9100 5 H=7.4450 ........ Peter has replied to this mail but since I haven't subscribe to the tutor mailing list earlier hence I didn't receive the reply, I apologize for my mistake, today I checked his reply and he asked me to do few things: Can you read a file line by line? Can you split the line into a list of strings at whitespace occurences? Can you extract the first item from the list and convert it to an int? Can you remove the first two items from the list? Can you split the items in the list at the "="? I tried these and here is the code: f=open('filename') lines=f.readlines() new=lines.split() number=int(new[0]) mylist=[i.split('=')[0] for i in new] one thing I don't understand is why you asked to remove first two items from the list? and is the above code alright?, it can produce output like the one you mentioned: {1: {'HA2': 3.785, 'HA3': 3.913}, 2: {'H': 8.85, 'HA': 4.337, 'N': 115.757}, 3: {'H': 8.753, 'HA': 4.034, 'HB2': 1.808, 'N': 123.238}, 4: {'H': 7.91, 'HA': 3.862, 'HB2': 1.744, 'HG2': 1.441, 'N': 117.981}, 5: {'H': 7.445, 'HA': 4.077, 'HB2': 1.765, 'HG2': 1.413, 'N': 115.479}, 6: {'H': 7.687, 'HA': 4.21, 'HB2': 1.386, 'HB3': 1.605, 'HD11': 0.769, 'HD12': 0.769, 'HD13': 0.769, 'HG': 1.513, 'N': 117.326}, 7: {'H': 7.819, 'HA': 4.554, 'HB2': 3.136, 'N': 117.08}, 8: {'HD2': 3.745}, 9: {'H': 8.235, 'HA': 4.012, 'HB2': 2.137, 'N': 116.366}, 10: {'H': 7.979, 'HA': 3.697, 'HB': 1.88, 'HG12': 1.601, 'HG13': 2.167, 'HG21': 0.847, 'HG22': 0.847, 'HG23': 0.847, 'N': 119.03}, 11: {'H': 7.947, 'HA': 4.369, 'HB3': 2.514, 'N': 117.862}, 12: {'H': 8.191, 'HA': 4.192, 'HB2': 3.156, 'N': 121.264}, 13: {'H': 8.133, 'HA': 3.817, 'HB3': 1.788, 'HD11': 0.862, 'HD12': 0.862, 'HD13': 0.862, 'HG': 1.581, 'N': 119.136}} If not then please help to point out my mistake so that I can get the correct output. Thanking you for your help and time. Thanks, Amrita

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subtyping builtin type
by spir Jan. 2, 2014

Jan. 2, 2014

Hello, I don't remember exactly how to do that. As an example: class Source (str): __slots__ = ['i', 'n'] def __init__ (self, string): self.i = 0 # current matching index in source self.n = len(string) # number of ucodes (Unicode code points) #~ str.__init__(self, string) I thought I needed to call str's __init__, as in the line comented out, but (1) python refuses with a TypeError (2) all seems to work fine (meaning, the string is well stored, *implicitely*). Am I missing some point, or is this the way to do? How does it work? I particular, how does python know which param to take as source string? (There could be other params to __init__.) Thank you, Denis

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lists of lists: more Chutes & Ladders!
by Keith Winston Jan. 1, 2014

Jan. 1, 2014

I resolved a problem I was having with lists, but I don't understand how! I caught my code inadvertently resetting/zeroing two lists TWICE at the invocation of the game method, and it was leading to all the (gamechutes & gameladders) lists returned by that method being zeroed out except the final time the method is called. That is: the game method below is iterated iter times (this happens outside the method), and every time gamechutes and gameladders (which should be lists of all the chutes and ladders landed on during the game) were returned empty, except for the last time, in which case they were correct. I can see that doing the multiple zeroing is pointless, but I can't understand why it would have any effect on the returned values. Note that self.reset() is called in __init__, so the lists exist before this method is ever called, if I understand properly. def game(self, iter): """Single game""" self.gamechutes[:] = [] #when I take out these two slice assignments, self.gameladders[:] = [] # then gamechutes & gameladders work properly self.gamechutes = [] # these were actually in a call to self.reset() self.gameladders = [] #.... other stuff in reset() while self.position < 100: gamecandl = self.move() if gamecandl[0] != 0: self.gamechutes.append(gamecandl[0]) if gamecandl[1] != 0: self.gameladders.append(gamecandl[1]) return [iter, self.movecount, self.numchutes, self.numladders, self.gamechutes, self.gameladders] I'm happy to share the rest of the code if you want it, though I'm pretty sure the problem lies here. If it's not obvious, I'm setting myself up to analyse chute & ladder frequency: how often, in a sequence of games, one hits specific chutes & ladders, and related stats. As always, any comments on style or substance are appreciated.

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same python script now running much slower
by Protas, Meredith Dec. 31, 2013

Dec. 31, 2013

Hi, I'm very new to python so I'm sorry about such a basic question. I am using a python script generated by another person. I have used this script multiple times before and it takes around 24 hours to run. Recently, I have tried to run the script again (the same exact command lines) and it is much much slower. I have tried on two different computers with the same result. I used top to see if there were any suspicious functions that were happening but there seems to not be. I also ran another python script I used before and that went at the same speed as before so the problem seems unique to the first python script. Does anyone have any idea why it is so much slower now than it used to be (just around a month ago). Thanks for your help! Meredith

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can't install
by Lolo Lolo Dec. 31, 2013

Dec. 31, 2013

ive struggled all day to install pip on ubuntu 12.04 for python 3.3 . The only pip in the apt-get cache is for python 2. i tried to download pip from source but setuptools is missing when it tries to import it. This made me download setuptools with apt-get but the version there is only for python 3.2 I've also download the distribute_setup.py file to get pip through easy_install but it returns errors when it uses urllib.request. Something to do with https, although the same distribute_setup.py worked perfectly when i used it on windows for 3.1 and 3.3. This all started because i wanted to use virtualenv. After installing it i couldn't use it cos it needed zlib which i didn't have. apt-get only has zlib for python 2.7. I'm now at my wit's end. Life was great using windows. Everyone told me try ubuntu, now life is so stressful, even on christmas eve:( Any ideas on how to solve this issue would be appreciated:(

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