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• how to send file via http with python

  - by ep45

  Hello, I have a problem. I use Apache with mod_wsgi and webpy, and when i send a file on http, a lot packets are lost. This is my code : web.header('Content-Type','video/x-flv') web.header('Content-length',sizeFile) f = file(FILE_PATH, 'rb') while True: buffer = f.read(4*1024) if buffer : yield buffer else : break f.close() What in my code is wrong ? thanks.

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• Using Tkinter in python to edit the title bar

  - by Dan

  I am trying to add a custom title to a window but I am having troubles with it. I know my code isn't right but when I run it, it creates 2 windows instead, one with just the title tk and another bigger window with "Simple Prog". How do I make it so that the tk window has the title "Simple Prog" instead of having a new additional window. I dont think I'm suppose to have the Tk() part because when i have that in my complete code, there's an error from tkinter import Tk, Button, Frame, Entry, END class ABC(Frame): def __init__(self,parent=None): Frame.__init__(self,parent) self.parent = parent self.pack() ABC.make_widgets(self) def make_widgets(self): self.root = Tk() self.root.title("Simple Prog")

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• mouse rollover event in Python (VPython)

  - by kame

  Is there something similar to scene.mouse.getclick in the visual module (VPython)? I need it for a rollover. Thanks in advance. EDIT: I need a function for doing something when the mouse moves inside a special area without clicking.

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• Counting positive elements in a list with Python list comprehensions

  - by AntiRush

  I have a list of integers and I need to count how many of them are 0. I'm currently doing it with a list comprehension that looks like this: sum([1 for x in frequencies if x > 0]) It seems like a decent comprehension but I don't really like the "1"; it seems like a bit of a magic number. Is there a more Pythonish way to do this?

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• Encoding in python with lxml - complex solution

  - by Vojtech R.

  Hi, I need to download and parse webpage with lxml and build UTF-8 xml output. I thing schema in pseudocode is more illustrative: from lxml import etree webfile = urllib2.urlopen(url) root = etree.parse(webfile.read(), parser=etree.HTMLParser(recover=True)) txt = my_process_text(etree.tostring(root.xpath('/html/body'), encoding=utf8)) output = etree.Element("out") output.text = txt outputfile.write(etree.tostring(output, encoding=utf8)) So webfile can be in any encoding (lxml should handle this). Outputfile have to be in utf-8. I'm not sure where to use encoding/coding. Is this schema ok? (I cant find good tutorial about lxml and encoding, but I can find many problems with this...) I need robust approved solution so I ask you seniors. Many thanks

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• Javascript or Python? beginner getting up to speed

  - by user62617

  Which language will allow a beginner to get up to speed quicker? Basically which language of the two is easier to learn

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• python mud server..............

  - by mudman

  in the coding of a mud server it says clients=[] know what do you write there example plz

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• remove a sublist from a list in python

  - by ariel

  Hi I am looking for a way to remove a sublist from a list. something like this: a=range(1,10) a.remove([2,3,7]) print a a=[1,4,5,6,8,9]

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• Python Least-Squares Natural Splines

  - by Eldila

  I am trying to find a numerical package which will fit a natural which minimizes weighted least squares. There is a package in scipy which does what I want for unnatural splines. import numpy as np import matplotlib.pyplot as plt from scipy import interpolate import random x = np.arange(0,5,1.0/2) xs = np.arange(0,5,1.0/500) y = np.sin(x+1) for i in range(len(y)): y[i] += .2*random.random() - .1 knots = np.array([1,2,3,4]) tck = interpolate.splrep(x,y,s=1,k=3,t=knots,task=-1) ynew = interpolate.splev(xs,tck,der=0) plt.figure() plt.plot(xs,ynew,x,y,'x')

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• [Python] How to use re match objects in a list comprehension

  - by Brent.Longborough

  I have a function to pick out lumps from a list of strings and return them as another list: def filterPick(lines,regex): result = [] for l in lines: match = re.search(regex,l) if match: result += [match.group(1)] return result Is there a way to reformulate this as a list comprehension? Obviously it's fairly clear as is; just curious.

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• Python newbie: trying to create a script that opens a file and replaces words

  - by user248959

  Hi, im trying to create a script that opens a file and replace every 'hola' with 'hello'. f=open("kk.txt","w") for line in f: if "hola" in line: line=line.replace('hola','hello') f.close() But im getting this error: Traceback (most recent call last): File "prueba.py", line 3, in for line in f: IOError: [Errno 9] Bad file descriptor Any idea? Javi

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• Text-based game graphics in Python

  - by Jasper

  Hi, i'm pretty new 2 programming, and I'm creating a simple text-based game I'm wondering if there is a simple way to create my own terminal-type window with which I can place coloured input etc. Is there a graphics module well suited to this? I'm using Mac, but I would like it to work on Windows as well Thanks

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• In python, changing MySQL query based on function variables

  - by ensnare

  I'd like to be able to add a restriction to the query if user_id != None ... for example: "AND user_id = 5" but I am not sure how to add this into the below function? Thank you. def get(id, user_id=None): query = """SELECT * FROM USERS WHERE text LIKE %s AND id = %s """ values = (search_text, id) results = DB.get(query, values) This way I can call: get(5) get(5,103524234) (contains user_id restriction)

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• Sending and receiving async over multiprocessing.Pipe() in Python

  - by dcolish

  I'm having some issues getting the Pipe.send to work in this code. What I would ultimately like to do is send and receive messages to and from the foreign process while its running in a fork. This is eventually going to be integrated into a pexpect loop for talking to interpreter processes. ` from multiprocessing import Process, Pipe def f(conn): cmd = '' if conn.poll(): cmd = conn.recv() i = 1 i += 1 conn.send([42 + i, cmd, 'hello']) if __name__ == '__main__': parent_conn, child_conn = Pipe() p = Process(target=f, args=(child_conn,)) p.start() from pdb import set_trace; set_trace() while parent_conn.poll(): print parent_conn.recv() # prints "[42, None, 'hello']" parent_conn.send('OHHAI') p.join() `

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• Python SQLite: database is locked

  - by user322683

  I'm trying this code: import sqlite connection = sqlite.connect('cache.db') cur = connection.cursor() cur.execute('''create table item (id integer primary key, itemno text unique, scancode text, descr text, price real)''') connection.commit() cur.close() I'm catching this exception: Traceback (most recent call last): File "cache_storage.py", line 7, in <module> scancode text, descr text, price real)''') File "/usr/lib/python2.6/dist-packages/sqlite/main.py", line 237, in execute self.con._begin() File "/usr/lib/python2.6/dist-packages/sqlite/main.py", line 503, in _begin self.db.execute("BEGIN") _sqlite.OperationalError: database is locked Permissions for cache.db are ok. Any ideas?

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• Single quotes vs. double quotes in Python

  - by Readonly

  According to the documentation, they're pretty much interchangeable. Is there a stylistic reason to use one over the other?

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• Best way to strip punctuation from a string in Python

  - by Lawrence Johnston

  It seems like there should be a simpler way than: import string s = "string. With. Punctuation?" # Sample string out = s.translate(string.maketrans("",""), string.punctuation) Is there?

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• List to CSV in Python

  - by Steve

  Hi, I am creating a CSV from a list of values. CSV File gets created but the csv is formed as a single column. Actually it should be multiple rows with multiple columns, instead it forms as a multiple rows with a single column. I am using the following code from random import choice import csv fileObject = csv.writer(open('Insurance.csv','w'),dialect='excel',delimiter=' ') for i in range(0,175): current_list = list(choice(master_list)) fileObject.writerows(current_list) current_list = [] Thanks

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• Javascript of Python? beginner getting up to speed

  - by user62617

  which language will allow a beginner to get to speed quicker? Basically what language of two is easier to learn

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• draw circle PIL - python

  - by ariel

  Hi I am looking for a command that will draw a circle on an existing image. im=Image.open(path) looking for a function that will draw a coloured circle with radious r and center(x,y) thanks for any help provided Ariel

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• Python 2.5.2: trying to open files recursively

  - by user248959

  Hi, the script below should open all the files inside the folder 'pruebaba' recursively but i get this error: Traceback (most recent call last): File "/home/tirengarfio/Desktop/prueba.py", line 8, in f = open(file,'r') IOError: [Errno 21] Is a directory This is the hierarchy: pruebaba folder1 folder11 test1.php folder12 test1.php test2.php folder2 test1.php The script: import re,fileinput,os path="/home/tirengarfio/Desktop/pruebaba" os.chdir(path) for file in os.listdir("."): f = open(file,'r') data = f.read() data = re.sub(r'(\s*function\s+.*\s*{\s*)', r'\1echo "The function starts here."', data) f.close() f = open(file, 'w') f.write(data) f.close() Any idea? Regards Javi

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• Decimal Base Conversion using PYTHON

  - by Butinyane More

  PROBLEM DESCRIPTION Given a decimal number, and a new base to represent it in. If the base is larger than 10, use capital letters for the digits(that is, A is 10, B is 11 and so forth). The decimal number given, and the new base, will both be integer values, separated by a space. The base to convert to will always be smaller than or equal to 30. Please create a program that will convert a decimal number to any base in this instance. When evaluating the program the sample input must something like: 18 2 and the program must output the following: 10010 Please i beg of you to send me a solution to this problem as soon as possible.

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• Why can you reference an imported module using the importing module in python

  - by noam

  I am trying to understand why any import can be referenced using the importing module, e.g #module master.py import slave and then >>>import master >>>print master.slave gives <module 'slave' from 'C:\Documents and Settings....'> What is the purpose of the feature? I can see how it can be helpful in a package's __init__.py file, but nothing else. Is it a side effect of the fact that every import is added to the module's namespace and that the module's namespace is visible from the outside? If so, why didn't they make an exception with data imported from other modules (e.g don't show it as part of the module's namespace for other modules)?

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• Formatting floats in Python without superfluous zeros

  - by TarGz

  How to format a float so it does not containt the remaing zeros? In other words, I want the resulting string to be as short as possible..? Like: 3 -> "3" 3. -> "3" 3.1 -> "3.1" 3.14 -> "3.14" 3.140 -> "3.14"

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• abstract test case using python unittest

  - by gruszczy

  Is it possible to create an abstract TestCase, that will have some test_* methods, but this TestCase won't be called and those methods will only be used in subclasses? I think I am going to have one abstract TestCase in my test suite and it will be subclassed for a few different implementation of a single interface. This is why all test methods are the some, only one, internal method changes. How can I do it in elegant way?

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