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python Programming Glossary: edParsing nested function calls using pyparsing http://stackoverflow.com/questions/10168935/parsing-nested-function-calls-using-pyparsing nested function calls using pyparsing I'm trying to use pyparsing.. to parse f g x y That's what I can't get. Here's a boiled down example from pyparsing import Forward Word alphas alphanums.. Word nums functor identifier # allow expression to be used recursively expression Forward arg identifier integer expression..
Using multiprocessing.Manager.list instead of a real list makes the calculation take ages http://stackoverflow.com/questions/13121790/using-multiprocessing-manager-list-instead-of-a-real-list-makes-the-calculation of a real list makes the calculation take ages I wanted to try different ways of using multiprocessing starting with.. for x in t print result.get Here l is a list that gets copied 4 times when 4 processes are spawned. To avoid that the documentation.. a list that gets copied 4 times when 4 processes are spawned. To avoid that the documentation page offers using queues shared..
Why is pip installing an old version of my package? http://stackoverflow.com/questions/14617136/why-is-pip-installing-an-old-version-of-my-package installing an old version of my package I've just uploaded a new version of my package to PyPi 1.2.1.0 r4 I can download.. pip install Iv tome 1.2.1.0 r4 I get this message Requested tome 1.2.1.0 r4 but installing version 1.1.0.0 but I don't understand.. version 1.1.0.0 but I don't understand why. I double checked with parse_version and confirmed that the version string on..
Force Python to forego native sqlite3 and use the (installed) latest sqlite3 version http://stackoverflow.com/questions/1545479/force-python-to-forego-native-sqlite3-and-use-the-installed-latest-sqlite3-ver Python to forego native sqlite3 and use the installed latest sqlite3 version The error message I am trying to get.. no attribute 'enable_load_extension' I have 'easy_install' ed the latest sqlite3 version and python somehow know it is there.. can be a bit confusing. The sqlite database adapter started out as a separate project pysqlite2 but for Python 2.5 a version..
BeautifulSoup - easy way to to obtain HTML-free contents http://stackoverflow.com/questions/1752662/beautifulsoup-easy-way-to-to-obtain-html-free-contents Unfortunately inside that a tag there are a lot of nested tags like font b and different things... I'd like to get just.. color green CCS Ingegneria Elettronica Sportello studenti ed orientamento B FONT A Of course it's ugly and the markup is.. 03 11 2009 CCS Ingegneria Elettronica Sportello studenti ed orientamento In the documentation it says to use text True in..
can't open unicode url with python http://stackoverflow.com/questions/1916684/cant-open-unicode-url-with-python u' xe1' in position 8 ordinal not in range 128 I've tried using before passing the url to urllib this url urllib.quote.. zA Z the special characters . ' not including the quotes ed and reserved characters used for their reserved purposes may.. characters . ' not including the quotes ed and reserved characters used for their reserved purposes may be used unencoded..
How to detect a Christmas Tree? http://stackoverflow.com/questions/20772893/how-to-detect-a-christmas-tree Tree Which image processing techniques could be used to implement an application that detects the christmas trees.. an application that detects the christmas trees displayed in the following images I'm searching for solutions that are.. only Open Source technologies. The solution must be tested with the images that are shared on this question. There are..
Why “is” keyword has different behavior when there is dot in the string? http://stackoverflow.com/questions/2858603/why-is-keyword-has-different-behavior-when-there-is-dot-in-the-string why its like that Edit to make sure above I have just tested on python 2.5.4 2.6.5 2.7b2 python 3.1 on windows and python.. objects of that type to see if some of them could be reused by adding a new reference to the same underlying object . This.. one object is made for the literal any literal and indeed f True Pragmatically that's because within a function making..
What are the differences between Perl, Python, AWK and sed? [closed] http://stackoverflow.com/questions/366980/what-are-the-differences-between-perl-python-awk-and-sed are the differences between Perl Python AWK and sed closed just want to know what are the main differences among.. are the differences between Perl Python AWK and sed closed just want to know what are the main differences among them.. it's not vs. like topic just information. python perl sed awk language comparisons share improve this question In..
Python Tkinter Embed Matplotlib in GUI http://stackoverflow.com/questions/4073660/python-tkinter-embed-matplotlib-in-gui Tkinter Embed Matplotlib in GUI I'm trying to embed a plot in my Tkinter.. Tkinter Embed Matplotlib in GUI I'm trying to embed a plot in my Tkinter GUI coded in Python. I believe the code.. in GUI I'm trying to embed a plot in my Tkinter GUI coded in Python. I believe the code below succeeds in simply putting..
Zombie process in python multiprocessing daemon http://stackoverflow.com/questions/6428842/zombie-process-in-python-multiprocessing-daemon After researching python daemons this walk through seemed to be the most robust http www.jejik.com articles 2007 02 a_simple_unix_linux_daemon_in_python.. class which I believe is working I have not thoroughly tested the code except that on the close I get a zombie process. I.. that on the close I get a zombie process. I have read I need to wait for the return code from the child but I just cannot..
http://stackoverflow.com/questions/7133179/python-yield-and-delete How do I yield an object from a generator and forget it immediately so that it doesn't take up memory For example in the following.. Return elements from the iterable in `chunksize` ed lists. The last returned element may be smaller if length of.. from the iterable in `chunksize` ed lists. The last returned element may be smaller if length of collection is not divisible..
http://stackoverflow.com/questions/7134071/cant-use-pip-anymore above Edit What I can guess is that this morning I crated a virtualenv installed a package written by myself by running.. guess is that this morning I crated a virtualenv installed a package written by myself by running python setup.py install.. improve this question I note that distribute is installed in usr local but pip is in usr lib so I'm guessing that you..
Get image size wihout downloading it in Python http://stackoverflow.com/questions/7460218/get-image-size-wihout-downloading-it-in-python I don't want to download all the images. Edit Following ed. suggestions I edited the code. I came up with this code . Not.. download all the images. Edit Following ed. suggestions I edited the code. I came up with this code . Not sure weather it.. all the images. Edit Following ed. suggestions I edited the code. I came up with this code . Not sure weather it downloads..
How to know/change current directory in Python shell? http://stackoverflow.com/questions/8248397/how-to-know-change-current-directory-in-python-shell other modules You can set an environment variable called PYTHONPATH under Linux would be like export PYTHONPATH path.. the interpreter searches also at this place for import ed modules. I guess the name would be the same under Windows but.. be the same under Windows but don't know how to change. edit Under Windows set PYTHONPATH PYTHONPATH C My_python_lib taken..
NumPy vs. multiprocessing and mmap http://stackoverflow.com/questions/9964809/numpy-vs-multiprocessing-and-mmap large numpy arrays in parallel. The arrays are memory mapped using numpy.load mmap_mode 'r' in the master process. After.. 0.57735026 0. 0. 0. 0. 0. 0. 0. 0. 0. dtype float32 ignored in the unittest logs. The tests pass fine nevertheless. Any.. 2.7.2 OS X NumPy 1.6.1. UPDATE After some debugging I hunted down the cause to a code path that was using a small slice of..
Parsing XML in Python using ElementTree example http://stackoverflow.com/questions/1786476/parsing-xml-in-python-using-elementtree-example Here is the error I get from the real file when I use Ed Carrel's method type 'exceptions.AttributeError' AttributeError..
Web Crawler To get Links From New Website http://stackoverflow.com/questions/19914498/web-crawler-to-get-links-from-new-website for tag_li in soup.findAll 'li' attrs data section Op Ed for link in tag_li.findAll 'a' urlnew urlnew link.get 'href'..
how to make python load dylib on osx http://stackoverflow.com/questions/2488016/how-to-make-python-load-dylib-on-osx to the script env nogo. Any help appreciated. Ed update 4 6 10 Solved with the info from krunk below. But just..
Short Description of Python Scoping Rules http://stackoverflow.com/questions/291978/short-description-of-python-scoping-rules rule for Python Scope resolution from Learning Python 3rd. Ed. . These rules are specific to variable names not attributes...
How are closures implemented in Python? http://stackoverflow.com/questions/3145893/how-are-closures-implemented-in-python are closures implemented in Python Learning Python 4th Ed. mentions that the enclosing scope variable is looked up when..
Analyze audio using Fast Fourier Transform http://stackoverflow.com/questions/604453/analyze-audio-using-fast-fourier-transform you could try Understanding Digital Signal Processing 2nd Ed. . It was very helpful for me. So that is what those numbers..
Why is it “Easier to ask forgiveness than permission” in python, but not in Java? [closed] http://stackoverflow.com/questions/6092992/why-is-it-easier-to-ask-forgiveness-than-permission-in-python-but-not-in-java to relevant parts of the famous book Effective Java 2nd Ed excerpt from the above book The moral of this story is simple..
How Big can a Python Array Get? http://stackoverflow.com/questions/855191/how-big-can-a-python-array-get run array list methods such as sorting etc Thanks so much Ed python arrays size share improve this question According..
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