Spoiler to Python Challenge (help!!!)
Damn this is annoying me. I have a webpage with a BZ2 compressed text embedded in it looking like: 'BZh91AY&SYA\xaf\x82\r\x00\x00\x01\x01\x80\x02\xc0\x02\x00 \x00!\x9ah3M \x07<]\xc9\x14\xe1BA\x06\xbe\x084' Now, if I simply copy and paste this into Python and decompress it - it works a treat. However, I want to read the file containing this data, extract the data and decompress it and this for some reason does not work. I am doing the following (excuse the probably very long handed way of doing it): file = urllib.urlopen(url, proxies=proxies) line = file.readlines() file.close() line = line[20:] line = line[:-1] user = line[0] password = line[1] user = user[5:] user = user[:-2] user = str(user) password = password[5:] password = password[:-2] This gives me a user string of: BZh91AY&SYA\xaf\x82\r\x00\x00\x01\x01\x80\x02\xc0\x02\x00 \x00!\x9ah3M \x07<]\xc9\x14\xe1BA\x06\xbe\x084 But if I put this into the decompression function, I get a error of 'IOError: invalid data stream'. I know it is the escape characters but how do I get these to be correctly converted into a string compatible with bz2.decompress()? -- http://mail.python.org/mailman/listinfo/python-list
Re: Spoiler to Python Challenge (help!!!)
"Terry Reedy" <[EMAIL PROTECTED]> wrote in news:[EMAIL PROTECTED]: > > please, line = line[20:-1], etc, is easier to read and understand ;-) Thanks, i'll put that in. -- http://mail.python.org/mailman/listinfo/python-list
Re: Spoiler to Python Challenge (help!!!)
Terry Hancock <[EMAIL PROTECTED]> wrote in news:[EMAIL PROTECTED]: > > Took me a long time to figure out what you meant. ;-) > > So the string actually contains the backslashes, not the escaped > characters. > > This works: > bz2.decompress(eval(repr(user))) > 'huge' Unfortunately, it doesn't. Get the same error. -- http://mail.python.org/mailman/listinfo/python-list
Re: Spoiler to Python Challenge (help!!!)
Terry Hancock <[EMAIL PROTECTED]> wrote in
news:[EMAIL PROTECTED]:
>
bz2.decompress(eval('"' + user + '"'))
>
> Sorry about that. I was trying the other as an alternative,
> but in fact, it doesn't work. So ignore that.
Excellent! Thanks.
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How to use generators?
I have never used generators before but I might have now found a use for them. I have written a recursive function to solve a 640x640 maze but it crashes, due to exceeding the stack. The only way around this I can think of is to use Generator but I have no idea how to. The function is as below: def solve_maze(x,y): if y <= 0: success = 1 elif x <= 0 or x > 640 or y >= 640: success = 0 elif maze_array[x][y] == 1: success = 0 elif im.getpixel((x,y)) == (255, 255, 255, 255): success = 0 else: maze_array[x][y] = 1 if solve_maze(x,y-1) == 1: success = 1 elif solve_maze(x+1,y) == 1: success = 1 elif solve_maze(x-1,y) == 1: success = 1 else: success = solve_maze(x,y+1) if success == 1: print im.getpixel((x,y)) return success #Main wibble = solve_maze(x,y) -- http://mail.python.org/mailman/listinfo/python-list
Re: How to use generators?
Tom Anderson <[EMAIL PROTECTED]> wrote in news:[EMAIL PROTECTED]: > > Exactly - using a queue means you'll do a breadth-first rather than a > depth-first search, which will involve much less depth of recursion. > See: Thanks for the answers but found a easier (admittedly cheating) way around the problemrun the code on my 64bit Linux system at home. -- http://mail.python.org/mailman/listinfo/python-list
Re: Writing pins to the RS232
Peter Hansen <[EMAIL PROTECTED]> wrote in news:[EMAIL PROTECTED]: > > All true, but then Jay might get into electrical compatibility issues, > and may not realize that the output levels of RS-232 serial hardware > are not simply 0 and 5V levels, but rather +9V (or so) and -9V (and > with variations from 6V up to 13V seen in the wild), and without much > in the way of drive capability. Using this to control custom hardware > would probably be an exercise in frustration and kind of pointless in > comparison to using parallel hardware, which at least has more typical > logic voltage levels. You can get ICs that convert RS232 to TTL voltage levels. -- http://mail.python.org/mailman/listinfo/python-list
TKinter, Entry objects and dynamic naming
I am hoping someone may be able to help. I am using Python and TKinter to create a GUI program that will eventually create an XML file for a project I am working on. Now, the XML file contents changes depending on the type of file it represents - so I am dynamically creating the TK Entry boxes. The problem is, I want the variable assigned to each of these boxes to be dynamically assigned as well but I cannot see how to do this (if it is indeed possible). Example If the file the XML is to represent is a spreadsheet - I want the first entry box to be: spreadsheetField = StringVar() value = Entry(root, relief=SUNKEN, justify=LEFT, textvariable=spreadsheetField) however, if the file is a document - I want the first entry box to be: documentField = StringVar() value = Entry(root, relief=SUNKEN, justify=LEFT, textvariable=documentField) I have quite a few Entry boxes for each file type (about 10) and a lot of filetypes (over 80), so I do not want to have a custom function for each filetype if I can help it. I have looked at using a dictionary but I cannot get my head around how to do that either. If anyone can give me any ideas, I would be very grateful. -- http://mail.python.org/mailman/listinfo/python-list
Re: TKinter, Entry objects and dynamic naming
Ian Vincent <[EMAIL PROTECTED]> wrote in news:[EMAIL PROTECTED]: > > I have looked at using a dictionary but I cannot get my head around > how to do that either. I have tried this now but the Entry field just does not seem to work: def add_variable(self, root, varname): Label(root, text=varname + ': ').grid(row=self.row, column=0, sticky=E) self.properties[varname] = StringVar() value = Entry(root, relief=SUNKEN, justify=LEFT, textvariable=self.properties[varname]) value.grid(row=self.row, column=1, sticky=E+W) self.row = self.row + 1 return value Confused. :-( -- http://mail.python.org/mailman/listinfo/python-list
Re: Help need with converting Hex string to IEEE format float
Max M <[EMAIL PROTECTED]> wrote in news:41bf121e$0$280
[EMAIL PROTECTED]:
>
> ##
> st = '80 00 00 00'
>
> import binascii
> import struct
>
> s = ''.join([binascii.a2b_hex(s) for s in st.split()])
> v = struct.unpack("f", s)[0]
> print v
> ##
This one worked great for what I was trying to do.
Thanks to everybody for your help.
TTFN
Ian
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Jython Sounds Examples
I have been hunting around Google hits for any source code examples of using sound (preferably WAV) under Jython with no success (minus several using other toolkits such as JNRI and JES). Does anybody know if any such examples exist and if so, I would be grateful for a pointer in their direction? -- http://mail.python.org/mailman/listinfo/python-list
Jythonc Problem
I cannot find a Jython newsgroup, so apologies in advance if this question has been posted to the wrong group. Just written my first Jython program (previously written Python ones) and it is working fine in 'interpreted mode'. I now want to compile it into Java classes but I get the following error: Traceback (innermost last): File "/usr/share/jython/Tools/jythonc/jythonc.py", line 5, in ? File "/usr/share/jython/Tools/jythonc/main.py", line 299, in main File "/usr/share/jython/Tools/jythonc/main.py", line 162, in getOptions AttributeError: class 'org.python.modules.os' has no attribute 'path' Jython version is Jython 2.2a0 installed from the Suse 10.0 rpm Java version is 1.4.2_06-b03 (possibly also installed from the Suse 10.0 rpm. Any help would be appreciated. Ian -- http://mail.python.org/mailman/listinfo/python-list
