Gribouillis

This snippet defines a function [icode]a2bits[/icode] which converts a characters string to a string of 0's and 1's showing its bitwise representation.

Your [icode]<a href="http://www.google.com/">Google</a>[/icode] is not a text node in your html document, but a [icode]<a>[/icode] node. You should probably write something like [code=python] from xml.dom.minidom import Document doc = Document() link = doc.createElement("a") link.attributes["href"] = "http://www.google.com/" google = doc.createTextNode("Google") link.appendChild(google) doc.appendChild(link) print doc.toxml() """ my output --> <?xml version="1.0" ?> …

Start with a script which prints the lines one by one [code=python] SOURCE_FILE = "myfile.srt" def main(): with open(SOURCE_FILE) as src_file: for line in src_file: print(repr(line)) if __name__ == "__main__": main() [/code]

The problem is that the int representation doesn't see the leading zeroes [code=python] >>> data1 = 0x0000001800000400000000000000000000000000000000000000000000000000fe00000000000000000000000000000000000000000000000000000000ffffff >>> data2 = 0x1800000400000000000000000000000000000000000000000000000000fe00000000000000000000000000000000000000000000000000000000ffffff >>> data1 == data2 True [/code] A solution is to add a leading "1" to your string and to remove the "1" when you convert back to a string.

I managed to do it like this [code=python] def bintohex(s): t = ''.join(chr(int(s[i:i+8],2)) for i in xrange(0, len(s), 8)) return binascii.hexlify(t) [/code] All of this would be easier with python >= 2.6 because of the builtin [icode]bin[/icode] function. See this code snippet for example [url]http://www.daniweb.com/code/snippet221031.html[/url]. In python 2.6, you could …

Use [icode]zip[/icode] [code=python] for i, a in zip(var1, var2): print i print a [/code] Items are printed until the shortest list is consumed.

[QUOTE=Parth tank;1481975]which data type use in paythone[/QUOTE] Perhaps you are looking for this page [url]http://docs.python.org/library/stdtypes.html[/url] ?

[QUOTE=joeywheels;1481681]Hi everyone! New here and to Python. I'm having trouble with my break statement executing and cannot figure out why. I'm learning to write to files and want the loop to break if the user hits enter. It's not working for some reason. I've even tried to get fancy (in …

Another explanation is to translate in pseudo code [code=text] how to move n disks from a to c using b as middle ? if n is 0: do nothing else: move n-1 disks from a to b using c as middle move the last disk from a to c move …

[QUOTE=paramaster;1479345]Hello daniweb community, i'm new to all this and i'm pretty happy that found this. Anyway i'm having sevral issues. Frist one is: my Python GUI (IDLE) won't open program. [CODE]def num(n): count=0 while count <= abs(n): count = count + 1 n= abs(n)/10 print count num(-23) [/CODE] This code …

At line 8, you are not using the list returned by createRandnums(), and you are passsing h_nums to oss() at line 11 instead of the list. Also I can't see where the list is sorted. If the list is sorted, you should have a look in the [b]bisect[/b] module to …

You could try [code=python] parser.add_option("-m", "--month", type="string", help="select month from 01|02|...|12", dest="mon") parser.add_option("-u", "--user", type="string", help="name of the user", dest="vos") options, arguments = parser.parse_args() if not options.vos and not options.mon: options.mon = strftime("%m") if options.mon: abbrMonth = tuple(month_abbr)[int(options.mon)] [/code]

[QUOTE=mithundas;1477091]how to import an existing python file and run it in an python shell....[/QUOTE] Start by reading this [url]http://docs.python.org/tutorial/modules.html[/url] . Also you can start a new thread if you have more questions.

Can't you just call [code=python] seno = seno_taylor(x+1, a) [/code] ?

I think there is a method askopenfilname() which returns only a file name instead of an open file. Otherwise, file objects have an attribute 'name' which you could use.

A first hint from the IronPython faq [url]http://ironpython.codeplex.com/wikipage?title=FAQ[/url] : [code=text] How do I compile .py files to a DLL for linking into my C# or VB program? IronPython does not support building DLLs for a C# style of linking and calling into Python code. You can define interfaces in C#, …

[QUOTE=needsHelp!;1473326]Please help me with, creating an checker board!! this is all i got right now [CODE]from cs1graphics import * n = 8 paper = Canvas(400, 400) for y in range(n) : for x in range(n) : square = Square(100) square.moveTo(x*50, y*50) paper.add(square) [/CODE][/QUOTE] I tested your code and it works, …

Here is a simple context to store the high scores in a csv file [code=python] from contextlib import contextmanager import csv @contextmanager def scorelist(filename): """Maintain a csv file with a list of scores""" try: with open(filename, "rb") as fin: reader = csv.reader(fin, delimiter=",") L = [ (row[0], int(row[1])) for row …

[code=python] >>> range(3,-1,-1) [3, 2, 1, 0] [/code] Also, consider using the collections.deque class for stacks and queues.

I suggest to call the following function to ensure the target directories exist [code=python] def make_target_dirs(target_paths): for dirname in set(os.path.dirname(p) for p in target_paths): if not os.path.isdir(dirname): os.makedirs(dirname) [/code] Edit: to attach a .py file, zip it first, then attach the zipped file.

Use the format() method [code=python] # python >= 2.6 numbers = [ 123456.78, 3434.2 ] for x in numbers: print( "The number is {num:0>9.2f}".format(num=x) ) """ my output --> The number is 123456.78 The number is 003434.20 """ [/code] See this code snippet for more [url]http://www.daniweb.com/code/snippet232375.html[/url] :)

This may help: [url]http://stackoverflow.com/questions/488449/can-a-python-script-persistently-change-a-windows-environment-variable-elegantl[/url] The answer with the use of the [b]setx.exe[/b] program looks interesting. If windows has a program to modify environment variables from the command line, a python script can easily call this program with the subprocess module. Another direction is to use ironpython instead of python, and …

See the standard modules getopt and optparse [url]http://docs.python.org/lib/module-getopt.html[/url] and [url]http://docs.python.org/lib/module-optparse.html[/url]

Here is another way to code this [code=python] import math def fsum(f, g, pairs): return sum(f(x)*g(y) for (x,y) in pairs) def one(x): return 1.0 def ident(x): return x def square(x): return x*x def plog(x): return x * math.log(x) def fit(pairs): pairs = list(pairs) si, op, ii, ip, oi = [ …

Many people who mix java and python use jython (a java based python) instead of python, which allows them to access java classes directly from python. In other versions of python, you must use the subprocess module. I have a code snippet with a Command class here [url]http://www.daniweb.com/code/snippet257449.html[/url] You can …

A simple way to call a c++ api from python is to use swig [url]http://www.swig.org/[/url]

> I realise i could import a module to do the same functions i wrote. > > The point was simply learning an efficient way to call methods between classes. > > The way i solved this was: class Callable: def __init__(self, function): self.__call__ = function class func: def addition(a, …

After the first [icode]l.pop(0)[/icode], the list is [icode]["asd'das",'qw','213'][/icode], so the second item is 'qw'.

You can use [icode]itertools.permutations[/icode] to rotate over all the numbers [code=python] import itertools for p in itertools.permutations(range(1, 5)): print(p) (1, 2, 3, 4) (1, 2, 4, 3) (1, 3, 2, 4) (1, 3, 4, 2) (1, 4, 2, 3) (1, 4, 3, 2) (2, 1, 3, 4) (2, 1, 4, …

I note that your module computes the roots of polynomials by bisection. This is a primitive way to find the roots and there are many other methods (see for example this article [url]http://en.wikipedia.org/wiki/Root-finding_algorithm[/url]). I hope you intend to strengthen pypol on this point. I once reviewed a few methods available …

[QUOTE=funfullson;1402925]Friends, no one use an interface with this ability? So if you want to trace your codes step by step, How do u do it? Lets discuss stronger. Lets List all _or at least more important_ interfaces of python that use in different operation systems. for example a list of …

To see if an object can be converted to something else, you must find its class and look in the object's class documentation, so try this first: [code=python] print(type(obj)) print(obj.__class__) [/code]

You can use time.time() [code=python] import time before = time.time() somme = raw_input('1 + 1 = ') diff = time.time() - before # time difference in seconds as a floating point number [/code]

Strings are indexable. [icode]text[0][/icode] is the first symbol.

Among the possible issues: 1/ The threading.Thread class has a special rule: [i]If the subclass overrides the constructor, it must make sure to invoke the base class constructor (Thread.__init__()) before doing anything else to the thread.[/i]. See [url]http://docs.python.org/library/threading.html#threading.Thread[/url] .This is a frequent source of errors, so you should move line …

Try this [code=python] D = dict() exec b in D [/code] Also learn about code tags here [url]http://www.daniweb.com/forums/announcement.php?f=8&announcementid=3[/url] :) Also note that network security rules prohibit using 'exec' on a piece of code received from a public network. This may potentially run arbitrary code on your computer.

A list of old recipes. [code=python] # linux, mac os.kill(pid, signal.SIGKILL) killedpid, stat = os.waitpid(pid, os.WNOHANG) if killedpid == 0: print >> sys.stderr, "ACK! PROCESS NOT KILLED?" # windows handle = subprocess.Popen("someprocess here", shell=False) subprocess.Popen("taskkill /F /T /PID %i"%handle.pid , shell=True) #also # Create a process that won't end on …

I could not parse it with csv, but if your string looks like python code, you can use python's own tokenizer: [code=python] # python 2 and 3 import sys if sys.version_info < (3,): from cStringIO import StringIO else: from io import StringIO xrange = range from tokenize import generate_tokens a …

[QUOTE=-ordi-;1434001][CODE]from copy import deepcopy sis = file("teedtest.01.sis", "r") val = file("rp.val", "wt") N, K = map(int, sis.readline().strip().split()) alist = [] for i in range(0, K): t = [] for i in range(0, K): t.append(0) alist.append(t) for i in range(K): a, b, c = map(int, sis.readline().strip().split()) alist[a][b] = alist[b][a] = c …

Your method [icode]_new_[/icode] should be named [icode]__init__[/icode] (note the double underscore on each side of the word init)

Perhaps use top's -n option ?

Try something like [code=python] from __future__ import print_function from os.path import join as pjoin DIR = pjoin("c:","Fummy_Tasks", "RECONSTR_ANALYSIS", "04052010", "test1_Strings") def stripped_lines(filename): with open(pjoin(DIR, filename), "rb") as fin: for line in fin: yield line.strip() def memdump(): return stripped_lines("test.txt") def evidence(): return stripped_lines("word1.txt") def main(outfile): cnt = 0 for line in …

You could add a hierarchy of classes [code=python] class Hero: # contains methods common to all heroes ... class Lord(Hero): # contains methods specific to Lords ... class MainHero(Lord): # contains main hero specific methods ... phill = MainHero(...) [/code] Don't nest classes, it is more annoying than useful. Write …

[QUOTE=Blackberryy;1410683]Anybodyy? really need help with this[/QUOTE] Post you code for drawing a single rectangle, the rest will be easy.

Use [icode]index = bisect.bisect(list, num)[/icode]. The list must be sorted. Also, don't use 'list' as a variable name.

Type [icode]pydoc turtle[/icode] in a terminal.

Here is a working __str__ function [code=python] class NonEmptyEnv(object): __slots__ = ('letter','digit','rest') def __init__(self,letter,digit,rest): self.letter = letter self.digit = digit self.rest = rest def __str__(self): result = self.letter + "=" + str(self.digit) if isinstance(self.rest, NonEmptyEnv): result += ',' + str(self.rest) return result [/code] Otherwise, your solution is overly complicated. You …

I used a tracer module and got the following output [code=text] 0. GUIcards.runGame(): # call, line 280 in blackjack.py 1. GUIcards.game_over(): # call, line 135 in blackjack.py return False return None [/code] So what happened is that your first call to game_over() returned False at line 135 and the body …

Each call to a recursive function uses a new set of local variables. It means the the inner call to countSubStringMatchRecursive will use another count variable, and the count variable of the calling function is not changed. The simplest way to understand recursion is to think about it the way …

Use a regular expression (module re) [code=python] import re digits_colon_re = re.compile(r"(?P<digits>\d+)\:") data = """ 4:14.4-17M,5:14.4-2e13M,6:14.4-4e9M,7:14.4-8e,22:28.4-35M,23:28.4-2e30M, 24:28.4-4e26M,25:28.4-8e18M,26:28.4-16e2M,27:28.4-18e,28:14.16-36M,29:14.16-2e32M, 30:14.16-4e28M,31:14.16-8e20M """.strip().replace("\n", "").split(",") print([int(match.group("digits")) for match in (digits_colon_re.search(s) for s in data)]) """ my output ---> [4, 5, 6, 7, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31] """ [/code]