I occasionally see the list slice syntax used in Python code like this:
newList = oldList[:]
Surely this is just the same as:
newList = oldList
Or am I missing something?
Somehow, this works fine in the Maya/Python script editor, but fails when it's inside of my module code. Anyone have any ideas?
class ControlShape(object):
def __init__(self, *args, **kwargs):
print 'Inside ControlShape...'
class Cross(ControlShape):
def __init__(self, *args, **kwargs):
print 'Entering Cross...'
super(Cross, self).__init__(*args, **kwargs)
print 'Leaving Cross...'
x = Cross()
This gives me a TypeError: super(type, obj): obj must be an instance or subtype of type.
If possible I would like to use the following structure for a command however I can't seem to figure out how to achieve this in Python:
./somescript.py arg <optional argument> -- "some long argument"
Would it be possible to achieve this in a feasible manner without too much dirty code? Or should I just reconsider the syntax (which is primarily preference).
Thanks!
got this error in adminpage after I try to save something into model
TypeError at /admin/some/model/1/
int() argument must be a string or a number, not 'RelatedManager'
django 1.2.1
python 2.6.5
os fedora core6
Hello,
Sometimes I break long conditions in IFs to several lines. The most obvious way to do this is:
if (cond1 == 'val1' and cond2 == 'val2' and
cond3 == 'val3' and cond4 == 'val4'):
do_something
Isn't very very appealing visually, because the action blends with the conditions. However, it is the natural way using correct Python indentation of 4 spaces.
Edit:
By the way, for the moment I'm using:
if ( cond1 == 'val1' and cond2 == 'val2' and
cond3 == 'val3' and cond4 == 'val4'):
do_something
Not very pretty, I know :-)
Can you recommend an alternative way ?
Hi,
I'm building a download manager in python for fun, and sometimes the connection to the server is still on but the server doesn't send me data, so read method (of HTTPResponse) block me forever. This happens, for example, when I download from a server, which located outside of my country, that limit the bandwidth to other countries.
How can I set a timeout for the read method (2 minutes for example)?
Thanks, Nir.
Does anyone have experience using a Python HTML sanitizer / scrubber / filter?
I'm looking for a module that will remove any HTML tags from a string that are not found in a whitelist. Of course I've Googled it but haven't found anything definitive.
Thanks,
Everett
I wrote this code in VB to label columns in a table but now im writting a python script to automate the process and i can't make it work. Any thoughts??
Static v1 as variant
Static v2 as variant
Dim Output as double
Dim Start as double
Start = 1
If v2 = [XMIN] Then
Output = v1
Else
Output = v1 + 1
End If
v1 = Output
v2 = [XMIN]
I am new to distutils.. I am trying to include few data files along with the package.. here is my code..
from distutils.core import setup
setup(name='Scrapper',
version='1.0',
description='Scrapper',
packages=['app', 'db', 'model', 'util'],
data_files=[('app', ['app/scrapper.db'])]
)
The zip file created after executing python setup.py sdist does not include the scrapper.db file. I have scrapper.db file in the app directory..
thanks for the help.
Hi guys
I'm looking for an equivalent in python of dictionary.get(key, default) for lists. Is there any one liner idiom to get the nth element of a list or a default value if not available?
Thanks!
Let say i want to read the integers a, b and c from stdin (in one line, do not need to press return after each number). In c++, i would just do:
cin a b c;
How to do this in Python ?
In need to determine the angle(s) between two n-dimensional vectors in Python. For example, the input can be two lists like the following: [1,2,3,4] and [6,7,8,9].
Can anybody help me? Thanks in advance!
when i use client.mutateRow(self.tableName, row, mutations) to write data to hbase .
there is a exception,
IOError: IOError(message="Trying to contact region server Some server, retryOnlyOne=true, index=0, islastrow=true, tries=9, numtries=10, i=0, listsize=1, region=test,,1276665207312 for region test,,1276665207312, row 'hello', but failed after 10 attempts.\nExceptions:\n")
i use http://pypi.python.org/pypi/hbase-thrift/0.20.4 to write hbase.
seems it is a library bug.
anyone can help me ?
i have to send F2 key to telnet host how do i send it using python...using getch() i found that this '<' used for F2 key but while sending its not working..i think there will be some way to send special function keys but i am not able to find it..if somebody knows please help me.thanks in advance
I need to count the number of files in a directory using Python.
I guess the easiest way is len(glob.glob('*')), but I also count the directory as file.
Is there any way to count only the files in a directory?
Hi
I new to python and I read from someone else of the example code below:
class A:
def current(self):
data = Data(a=a,b=b,c=c)
return data
class B(A):
#something here
#print data a b c
How do I print out the data a, b, and c?
I want to write a database app in Python, using SQLite and wxPython.
My only "experience" is 1 class on basic C++ console programming and OOP concepts.
Which IDE would be best for my situation?
In case it matters, I only need my new program to run on Windows, and I do want to make it "portable".
Thank you.
I'd like to be able to parse out the city, state or zip from a string in python. So, if I entered
Boulder, Co
80303
Boulder, Colorado
Boulder, Co 80303
...
any variation of these it would return the city, state or zip.
This is all going to be user inputted data and inputted in one text field.
I have a lot of Perl scripts that looks something like the following. What it does is that it will automatically open any file given as a command line argument and in this case print the content of that file. If no file is given it will instead read from standard input.
while ( <> ) {
print $_;
}
Is there a way to do something similar in Python without having to explicitly open each file?
I'm a newbie to regular expressions and I have the following string:
sequence = ["{\"First\":\"Belyuen,NT,0801\",\"Second\":\"Belyuen,NT,0801\"}","{\"First\":\"Larrakeyah,NT,0801\",\"Second\":\"Larrakeyah,NT,0801\"}"]
I am trying to extract the text Belyuen,NT,0801 and Larrakeyah,NT,0801 in python. I have the following code which is not working:
re.search('\:\\"...\\', ''.join(sequence))
I.e. I want to get the string between characters :\ and \.
In a Python Google App Engine app I'm writing, I have an entity stored in the datastore that I need to retrieve, make an exact copy of it (with the exception of the key), and then put this entity back in.
How should I do this? In particular, are there any caveats or tricks I need to be aware of when doing this so that I get a copy of the sort I expect and not something else.
Is there any way to have Python operators line "==" and "" return ints instead of bools. I know that I could use the int function (int(1 == 1)) or add 0 ((1 == 1) + 0) but I was wondering if there was an easy way to do it. Like when you want division to return floats you could type from __future__ import division. Is there any way to do this with operators returning ints? Or could I make a class extending __future__._Feature that would do what I want?
I am trying to retrieve a 500mb file using Python, and I have a script which uses urllib.urlretrieve(). There seems to some network problem between me and the download site, as this call consistently hangs and fails to complete. However, using wget to retrieve the file tends to work without problems. What is the difference between urlretrieve() and wget that could cause this difference?