Hi there, I currently encountered a problem: I want to handle adding strings to other strings very efficiently, so I looked up many methods and techniques, and I figured the "fastest" method. But I quite can not understand how it actually works: def method6(): return ''.join([`num` for num in xrange(loop_count)]) From source (Met...
Hello, I am using ssh to log into a camera, scp a tarball over to it and extract files from the tarbal and then run the script. I am having problems with Pexpect, though. Pexpect times out when the tarball is being copied over. It seem's not to wait until it is done. And then it start's doing the same thing with the untar command, The c...
I want to be able to create a python decorator that automatically "registers" class methods in a global repository (with some properties). Example code: class my_class(object): @register(prop1,prop2) def my_method( arg1,arg2 ): # method code here... @register(prop3,prop4) def my_other_method( arg1,arg2 ): ...
I have a multi-line string defined like this: foo = """ this is a multi-line string. """ This string us used as test-input for a parser I am writing. The parser-function receives a file-object as input and iterates over it. It does also call the next() method directly to skip lines, so I really need an iterator as input, not an itera...
Hey, I have got a choiceField in my form, where I display filtered data. To filter the data I need two arguments. The first one is not a problem, because I can take it directly from an object, but the second one is dynamically generated. Here is some code: class GroupAdd(forms.Form): def __init__(self, *args, **kwargs): sel...
Background: running ubuntu So I downloaded the python "install from source" tarball. I ran make and got this error message: Python build finished, but the necessary bits to build these modules were not found: _aaa _bbb _ccc ... _jjj _kkk I google'd and found one solution is to: MANUALLY map all the string names from the error me...
I've got a long running python script that I want to be able to end from another python script. Ideally what I'm looking for is some way of setting a process ID to the first script and being able to see if it is running or not via that ID from the second. Additionally, I'd like to be able to terminate that long running process. Any co...
Hi guys I'm using matplotlib at the moment to try and visualise some data I am working on. I'm trying to plot around 6500 points and the line y = x on the same graph but am having some trouble in doing so. I can only seem to get the points to render and not the line itself. I know matplotlib doesn't plot equations as such rather just a ...
I will have a set of data (x, y, heading), and I need to animate it in real-time. I am currently using matplotlib to animate (x, y) and it works fine, but I would really like to have some way to indicate heading, ie what direction the object is facing. What would be the best library for this? It seems like PyGame might be able to help me...
Hello everyone! I'd like to know if there's a way to access to the class (or its fields) where an object is instantiated. Let's say I have: def Class1: def __init__(self): self.title = "randomTitle" self.anotherField = float() self.class2Field = Class2() and the class whose type will be the class2Field: d...
I know how to override an object's getattr() to handle calls to undefined object functions. However, I would like to achieve the same behavior for the builtin getattr() function. For instance, consider code like this: call_some_undefined_function() Normally, that simply produces an error: Traceback (most recent call last): File ...
I have few lists like: a = [1, 2, 3, 4, 5] b = [4, 6, 5, 9, 2] c = [4, 7, 9, 1, 2] I want to trim all of them using a loop, instead of doing as below: a[-2:] b[-2:] c[-2:] I tried but got confused with pass by value or pass by reference fundamentals, looked into other questions as well but no help. Thanks ...
if i have an nested list such as: m=[[34,345,232],[23,343,342]] if i write m.remove(345) it gives an error message saying element not in the list. i want to know how to remove an element from the nested list,easily?? ...
As a result of the comments in my answer on this thread, I wanted to know what the speed difference is between the += operator and ''.join() So what is the speed comparison between the two? ...
I have a LIST: ['tag1', 'tag2', 'tag3 tag3', ...] How do I delete [, ], '. I want to get a string: "tag1, tag2, tag3 tag3, ..." ...
I'm working on a Django-based web service and I'm trying to figure out what the best way to do my serialization will be. The tricky requirement, though, is that I'd like to have pretty much full control over format of, and fields contained in, the response. For example, the Django serializers (which, unfortunately, includes the wadofst...
Running ubuntu 9.04 "jaunty". When I run make I get the following error: Python build finished, but the necessary bits to build these modules were not found: _sqlite3 So the easy solution is to just install the missing dependency using apt-get, "sudo apt-get -f install libsqlite3-dev" but I get the following error: The following...
I've installed trac 0.12 on my ubuntu 10.04, running the tracd internal webserver. When i access the page at http://127.0.0.1/myTracProject, I get the error message: Traceback (most recent call last): File "/usr/local/lib/python2.6/dist-packages/Trac-0.11.7-py2.6.egg/trac/web/api.py", line 376, in send_error 'text/html') File "...
Hello everyone, How can I get the file name and line number in python script. Exactly the file information we get from an exception traceback. In this case without raising an exception. ...
I need to do a binomial test in Python that allows calculation for 'n' numbers of the order of 10000. I have implemented a quick binomial_test function using scipy.misc.comb, however, it is pretty much limited around n = 1000, I guess because it reaches the biggest representable number while computing factorials or the combinatorial its...