🌐 Mailman 3 September 2010 - Python-list - python.org

Problems with wsgi Python3
by hidura＠gmail.com Sept. 30, 2010

Sept. 30, 2010

Hello list, i had seriously troubles with the connection between a form and the wsgi, i' ve made an application on Python3 and was running perfectly but when i try to use the <form> to pass the data this can't be see on the server, so what is your recommendation?, i am open to all the ideas less leave to Python2 i can't all the project was write on Python3, i was looking into the PEP 444 proposal too. Here is the code what i used to take the data: <code>print(urllib.parse.parse_qs(environ['wsgi.input'].read(int(environ['CONTENT_LENGTH'])).decode()))</code> and here it's what the os.environ.item() prints to me: ('LESSOPEN', '|/usr/bin/lesspipe.sh %s') ('SSH_CLIENT', '190.94.122.180 38415 22') ('CVS_RSH', 'ssh') ('LOGNAME', 'hidura') ('INPUTRC', '/etc/inputrc') ('HOME', '/home/hidura') ('PATH', '/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/opt/dell/srvadmin/bin:/home/hidura/bin') ('LD_LIBRARY_PATH', '/home/hidura/webapps/karinapp/apache2/lib') ('LANG', 'en_US.UTF-8') ('TERM', 'xterm') ('SHELL', '/bin/bash') ('SHLVL', '3') ('G_BROKEN_FILENAMES', '1') ('HISTSIZE', '1000') ('_', '/home/hidura/webapps/karinapp/apache2/bin/httpd.worker') ('SSH_CONNECTION', '190.94.122.180 38415 174.121.79.178 22') ('SSH_TTY', '/dev/pts/5') ('HOSTNAME', 'web152.webfaction.com') ('PWD', '/home/hidura') ('MAIL', '/var/spool/mail/hidura') ('LS_COLORS', 'no=00:fi=00:di=00;34:ln=00;36:pi=40;33:so=00;35:bd=40;33;01:cd=40;33;01:or=01;05;37;41:mi=01;05;37;41:ex=00;32:*.cmd=00;32:*.exe=00;32:*.com=00;32:*.btm=00;32:*.bat=00;32:*.sh=00;32:*.csh=00;32:*.tar=00;31:*.tgz=00;31:*.arj=00;31:*.taz=00;31:*.lzh=00;31:*.zip=00;31:*.z=00;31:*.Z=00;31:*.gz=00;31:*.bz2=00;31:*.bz=00;31:*.tz=00;31:*.rpm=00;31:*.cpio=00;31:*.jpg=00;35:*.gif=00;35:*.bmp=00;35:*.xbm=00;35:*.xpm=00;35:*.png=00;35:*.tif=00;35:') -----------------------------110550484811701713451664404475--\r Thanks, i am desperate.

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PyRTF object model
by Rustom Mody Sept. 30, 2010

Sept. 30, 2010

I am trying to use PyRTF. I gather that an RTF doc consists of a list of sections, a section consists of a list of paras, paras seem to be just text (not sure on that one) Some questions: When does one end one section and start another? How does one handle lists (as in numbered, bulleted etc)?

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Re: eval string
by Peter Otten Sept. 30, 2010

Sept. 30, 2010

Brandon Harris wrote: > Needing to pass a string command into a third party program and having > issues creating a string to do what I need. > > here's what I have so far. > > eval('import sys; > sys.stderr.write(\'\n\n\nCompleted!!!\nCompleted!!!\nCompleted!!! \nCompleted!!!\nCompleted!!!\nCompleted!!!\n\n\n\');') > > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "<string>", line 1 > sys.stderr.write(' > ^ > SyntaxError: EOL while scanning string literal > > > so I've changed it up every way I can think and I get other errors. > > eval('import sys; > sys.stderr.write("\n\n\nCompleted!!!\nCompleted!!!\nCompleted!!! \nCompleted!!!\nCompleted!!!\nCompleted!!!\n\n\n");') > > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "<string>", line 1 > import sys; sys.stderr.write(" > ^ > SyntaxError: invalid syntax > > > Brandon L. Harris Python discriminates between statements and expressions. eval() can only deal with expressions, but 'import whatever' is a statement. Try exec 'import sys\nsys.stderr.write("completed!\n")' instead.

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eval string
by Brandon Harris Sept. 30, 2010

Sept. 30, 2010

Needing to pass a string command into a third party program and having issues creating a string to do what I need. here's what I have so far. eval('import sys; sys.stderr.write(\'\n\n\nCompleted!!!\nCompleted!!!\nCompleted!!!\nCompleted!!!\nCompleted!!!\nCompleted!!!\n\n\n\');') Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<string>", line 1 sys.stderr.write(' ^ SyntaxError: EOL while scanning string literal so I've changed it up every way I can think and I get other errors. eval('import sys; sys.stderr.write("\n\n\nCompleted!!!\nCompleted!!!\nCompleted!!!\nCompleted!!!\nCompleted!!!\nCompleted!!!\n\n\n");') Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<string>", line 1 import sys; sys.stderr.write(" ^ SyntaxError: invalid syntax Brandon L. Harris

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Clarification of notation
by Bruce Whealton Sept. 30, 2010

Sept. 30, 2010

Hello all, I recently started learning python. I am a bit thrown by a certain notation that I see. I was watching a training course on lynda.com and this notation was not presented. For lists, when would you use what appears to be nested lists, like: [[], [], []] a list of lists? Would you, and could you combine a dictionary with a list in this fashion? Next, from the documentation I see and this is just an example (this kind of notation is seen elsewhere in the documentation: str.count(sub[, start[, end]]) This particular example is from the string methods. Is this a nesting of two lists inside a a third list? I know that it would suggest that some of the arguments are optional, so perhaps if there are 2 items the first is the sub, and the second is start? Or did I read that backwards? Thanks, Bruce

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Re: if the else short form
by Andreas Waldenburger Sept. 30, 2010

Sept. 30, 2010

On Wed, 29 Sep 2010 08:53:17 -0400 Philip Semanchuk <philip(a)semanchuk.com> wrote: > Does Python make any guarantee that int(True) == 1 and int(False) == > 0 will always hold, or are their values an implementation detail? > <http://docs.python.org/release/3.1/reference/datamodel.html#the-standard-ty…> Booleans (bool) These represent the truth values False and True. The two objects representing the values False and True are the only Boolean objects. The Boolean type is a subtype of the integer type, and Boolean values behave like the values 0 and 1, respectively, in almost all contexts, the exception being that when converted to a string, the strings "False" or "True" are returned, respectively. /W -- INVALID? DE!

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Re: PyRTF object model
by Eric Brunel Sept. 30, 2010

Sept. 30, 2010

In article <mailman.1203.1285848899.29448.python-list(a)python.org>, Rustom Mody <rustompmody(a)gmail.com> wrote: > I am trying to use PyRTF. > > I gather that an RTF doc consists of a list of sections, a section > consists of a list of paras, > paras seem to be just text (not sure on that one) They also include a style, not only text. > Some questions: > > When does one end one section and start another? You don't 'end a section. You just create a new one and append it to your document's sections: my_document = PyRTF.Document() my_section1 = PyRTF.Section() my_document.Sections.append(my_section1) my_section2 = PyRTF.Section() my_document.Sections.append(my_section2) > How does one handle lists (as in numbered, bulleted etc)? Not sure on this one. I've had to do it, but could handle it via regular paragraph style properties and insert the bullets or numbers explicitely, so I did it just like that. For example, your can create a PyRTF.ParagraphPropertySet with the options left_indent to 1133 twips = 2cm, first_line_indent to -567 twips = -1cm and set a tab at 1cm with the option: tabs=[PyRTF.TabPropertySet(width=567)] Then you create a PyRTF.ParagraphStyle using this PyRTF.ParagraphPropertySet and pass it as the first argument when you create your PyRTF.Paragraph. Then, you just insert tour bullet or number in the paragraph explicitely, followed by a tab. There might be a better way to do it. BTW, as you might have noticed, the documentation for PyRTF is quite minimal to say the least, so the only way to figure out what can be done is by reading the PyRTF source code HTH -Eric -

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Re: PyCObject & malloc creating memory leak
by Tom Conneely Sept. 30, 2010

Sept. 30, 2010

Thanks for your reply, you've given me plenty to think about On Sep 29, 11:51 pm, Antoine Pitrou <solip...(a)pitrou.net> wrote: > > > My original plan was to have the data processing and data acquisition > > functions running in separate processes, with a multiprocessing.Queue > > for passing the raw data packets. The raw data is read in as a char*, > > with a non constant length, hence I have allocated memory using > > PyMem_Malloc and I am returning from the acquisition function a > > PyCObject containing a pointer to this char* buffer, along with a > > destructor. > > That sounds overkill, and I also wonder how you plan to pass that > object in a multiprocessing Queue (which relies on objects being > pickleable). Why don't you simply create a PyString object instead? Could you elaborate on why you feel this is overkill? Also, your right about passing the PyCObjects through a Queue, something which I hadn't really considered, so I've switched to using python strings as you suggested, an overhead I hoped to avoid but you can't win them all I suppose. > > So if I call these functions in a loop, e.g. The following will > > generate ~10GB of data > > > x = MyClass() > > for i in xrange(0, 10 * 2**20): > > c = x.malloc_buffer() > > x.retrieve_buffer(c) > > > All my memory disapears, until python crashes with a MemoryError. By > > placing a print in the destructor function I know it's being called, > > however it's not actually freeing the memory. So in short, what am I > > doing wrong? > > Python returns memory to the OS by calling free(). Not all OSes > actually relinquish memory when free() is called; some will simply set > it aside for the next allocation. > Another possible (and related) issue is memory fragmentation. Again, it > depends on the memory allocator. Yes, I know that's the case but the "freed" memory should be used for the next allocation, or atleast at some point before python runs out of memory. Anyway, this is besides the point as I've switched to using strings. Again thanks for taking the time to help me out, Tom Conneely

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Re: Python becoming orphaned over ssh
by John Nagle Sept. 30, 2010

Sept. 30, 2010

On 9/29/2010 7:24 AM, David wrote: > Hi there, I have a strange situation. > > If I do this: > > 1. Make a script /tmp/test.py on a remote server, with this contents: > > #!/usr/bin/python > from subprocess import check_call Python's signal handling for multithread and multiprocess programs leaves something to be desired. John Nagle

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will Gnome 3.0 kill pygtk?
by Tracubik Sept. 30, 2010

Sept. 30, 2010

Hi! It seem that the new version of gnome 3.0 will dismiss pygtk support. link: [1] http://live.gnome.org/TwoPointNinetyone/ (search killing pygtk) [2] http://live.gnome.org/GnomeGoals/PythonIntrospectionPorting i'm studying pygtk right now, am i wasting my time considering that my preferred platform is linux/gnome? thanks Nico

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