Can anyone recommend a good Django book? I have been looking on Amazon, and
the books seem to be out of date.
Thanks,
Chris
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I need to create a pie chart that is referenced by a wiki page. I am impressed
with matplotlib. Any other good libraries out there?
I do need to be able to save the chart as an image file, so it can be linked to
the wiki. My only complaint about matplotlib is that I have not figured out a
wa
I have a float variable that is very long.
>>> float_a = 1.16667
However, I want to pass the value of float_a to float_b, but I want the float
to be accurate to two decimal points.
>>> float_a = 1.16667
>>> print "%.2f" % float_a
1.17
I tried the following:
>>> float_b = "%.2f" % float_a
>>>
I'm trying to write a script that calculates the rate of disk usage. I think
the best way to accomplish this task is to write a script that will monitor a
server's capacity and how much space is being used on a daily basis and store
the information in a SQLite database. Then the program can re
I want to fill a database with the contents of a spreadsheet. The spreadsheet
was created by OpenOffice and is a .sxc document. What is the best way to do
this? I think the best approach is to save the spreadsheet as a .csv document
and then just parse the file. Am I on the right track here?
erything under the "comic" tag.
--- On Sat, 11/14/09, Kent Johnson wrote:
> From: Kent Johnson
> Subject: Re: [Tutor] parsing XML into a python dictionary
> To: "Christopher Spears"
> Cc: tutor@python.org
> Date: Saturday, November 14, 2009, 5:03 AM
&
I've been working on a way to parse an XML document and convert it into a
python dictionary. I want to maintain the hierarchy of the XML. Here is the
sample XML I have been working on:
Neil Gaiman
Glyn Dillon
Charles Vess
This is my first stab at this:
#!/usr/bin/env pyth
I'm trying to move a bunch of files and directories into another directory.
Unfortunately, I keep getting an error message:
Traceback (most recent call last):
File "checkDeviceType.py", line 46, in ?
cdt.moveFiles(barcodeList)
File "checkDeviceType.py", line 40, in moveFiles
shutil.m
Hi!
I need to parse several XML documents into a Python dictionary. Is there a
module that would be particularly good for this? I heard beginners should
start with ElementTree. However, SAX seems to make a little more sense to me.
Any suggestions?
__
I'm starting to learn PyQt. Can anyone recommend a good mailing list or forum?
Thanks.
"I'm the last person to pretend that I'm a radio. I'd rather go out and be a
color television set."
-David Bowie
"Who dares wins"
-British military motto
"There is no such thing as luck; there is only adeq
Hey,
I am trying to get to www.wxpython.org, but my connection keeps timing out. Is
the site down? I just want to download wxPython for Python 2.6 (Windows Vista
32 bit).
Thanks.
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I want to write a script that takes a list of images and renumbers them with a
user supplied number. Here is a solution I came up while noodling around in
the interpreter:
>>> alist = ["frame.0001.tif","frame.0002.tif","frame.0003.tif"]
>>> new_start = 5000
>>> for x in alist:
... name, nu
Hi!
Does anyone know if python has a noise function?
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I'm modifying a game for an assignment in "Game Programming" by Andy Harris.
I'm not reading this book as part of a class.
Basically, I turned one of the example games into an Asteroid rip off.
However, I didn't like the collisions between the spaceship and the asteroids,
so I decided to shri
I want to access a spaceship image with pygame.image.load(), so I wrote
self.image =
pygame.image.load("C:Users\Chris\Documents\python\assignment07\chris_graphics\spaceship.gif")
However, I got this error message:
error: Couldn't open
C:Users\Chris\Documents\python\assignment07\chris_graphics
I'm working out of "Game Programming (The L Line)" by Andy Harris. He writes
subclasses like so:
class TransCircle(collisionObjects.Circle):
def __init__(self):
collisionObjects.Circle.__init__(self)
self.image.set_colorkey((255, 255, 255))
Basically, he is creating a TransC
I'm trying to write a script that will renumber items in a list. Here is the
list:
unordered_list = ["frame.0029.dpx",
"frame.0028.dpx",
"frame.0025.dpx",
"frame.0026.dpx",
"frame.0027.dpx",
"frame.0017.dpx",
"frame.0019.dpx",
"frame.0023.dpx",
"frame.0018.dpx",
reak
else:
print "Invalid Choice!"
print "Try Again!"
--- On Tue, 8/12/08, Kent Johnson <[EMAIL PROTECTED]> wrote:
> From: Kent Johnson <[EMAIL PROTECTED]>
> Subject: Re: [Tutor] ecommerce.py
> To: [EMAIL PROTECTED]
>
I am working on problem 13-11 from Core Python Programming (2nd Edition). For
the problem, I am supposed to create the foundations of an e-commerce engine
for a B2C business-to-consumer) retailer. I need to create a class that
represents the customer called User, a class for items in inventory
Ok, here is the working version of my program. Thanks for all of the advice:
#!/usr/bin/python
import time
class date_format(object):
def __init__(self, month, day, year):
month_dict = {("jan","january") : 1,
("feb","february") :2,
Hey,
I'm working on a problem out of Core Python Programming (2nd Edition).
Basically, I'm creating a class that formats dates. Here is what I have so far:
#!/usr/bin/python
import time
class date_format(object):
def __init__(self, month, day, year):
month_dict = {("j
> To: [EMAIL PROTECTED], tutor@python.org
> Date: Monday, July 21, 2008, 1:30 PM
> On Sun, 20 Jul 2008, Christopher Spears wrote:
>
> > Has anyone used Python to watermark of sequence of
> images?
>
> There's a recipe for watermarking using PIL here:
>
> http://a
Has anyone used Python to watermark of sequence of images?
Thanks.
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>
> First, a tip:
>
> Instead of lista[:len(lista)-1], you can (and should) just
> write lista[:-1].
>
> Now, what if we wrap that in a function:
>
> >>> def shorten(lst):
> ... lst = lst[:-1] # identical to: lst =
> lst[:len(lst)-1]
> ...
>
> Then test it:
>
> >>> lista = [1, 2, 3, 4]
>
I am almost done with a stack class that I wrote:
#!/usr/bin/python
class Stack(list):
def isempty(self):
length = len(self)
if length == 0:
return True
else:
return False
def peek(self):
length = len(self)
if le
For another Core Python Programming question, I created a stack class. I then
put the class into a script to test it:
#!/usr/bin/python
class Stack(list):
def isempty(self):
length = len(self)
if length == 0:
return True
else:
return False
I have been reading everyone's comments on my line class. I have decided to
implement some of the suggestions. Someone suggested that I create a
Point.__cmp__ method. Here is what I have so far:
def __cmp__(self, other):
if self.x == other.x and self.y == other.y:
return 0
For problem 13-6 out of Core Python Programming, I created a line class that
consists of two points. The line class has the following methods: __repr__,
length, and slope. Here is the code:
#!/usr/bin/python
import sys,math
class Point(object):
def __init__(self, x=0.0,y=0.0):
se
I'm working on problem 13-5 in Core Python Programming (2nd Edition). I am
supposed to create point class. Here is what I have so far:
#!/usr/bin/python
class Point(object):
def __init__(self, x=0.0,y=0.0):
self.x = float(x)
self.y = float(y)
def __repr__(self)
I'm working on an exercise from Core Python Programming. I need to create a
function that takes a float value and returns the value as string rounded to
obtain a financial amount. Basically, the function does this:
dollarize(1234567.8901) returns-> $1,234,567,89
The function should allow for
I've been learning about how to implement an iterator in a class from Core
Python Programming (2nd Edition).
>>> class AnyIter(object):
... def __init__(self, data, safe=False):
... self.safe = safe
... self.iter = iter(data)
...
... def __iter__(self):
... return self
I just got Python installed on my Dell laptop running Windows Vista Business.
Can someone recommend a good text editor to use for Python programming? Some
people seem to like PythonWin. In the past I have use ConText.
Thanks!
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I've been working out of Core Python Programming (2nd Edition). Here is an
example demonstrating multiple inheritance.
>>> class A(object):
... pass
...
>>> class B(A):
... pass
...
>>> class C(B):
... pass
...
>>> class D(A, B):
... pass
...
Traceback (most recent call last):
I am reading Wesley Chun's "Core Python Programming" (2nd Edition) and have
reached the part on static and class methods. I typed in the following to
demonstrate the difference between the two methods:
>>> class TestClassMethod:
... def foo(cls):
... print 'calling class method fo
I created a file called arrays.py:
#!/usr/bin/python
locations = ["/home/",
"/office/" ,
"/basement/" ,
"/attic/"]
Now I want to add the word "chris" on to each element
of the locations list, so I wrote another script
called chris_arrays.py:
#!/usr/bin/python/
from arrays import locations
add
One of the exercises in Core Python Programming is to
create a regular expression that will match a street
address. Here is one of my attempts.
>>> street = "1180 Bordeaux Drive"
>>> patt = "\d+ \w+"
>>> import re
>>> m = re.match(patt, street)
>>> if m is not None: m.group()
...
'1180 Bordeaux'
I know people might be sick of this thread by now, but
I decided to post a solution to this problem that uses
regular expressions.
#!/usr/bin/env python
import string
import re
def my_strip(s):
remove_leading = re.sub(r'^\s+','',s)
remove_trailing =
re.sub(r'\s+$','',remove_leading)
I was looking for the source code for the strip
functions at python.org. I didn't find anything. Do
you or someone else know where the source code is
posted? I tried to find python on my workstation, but
I'm not sure where the sys admin installed it.
_
I'm working out of chapter 6 of Core Python
Programming (2nd Edition). For one problem, I am
supposed to write a script that is the equivalent of
string.strip(). Obviously, using any version of
string.strip() defeats the purpose of the exercise.
I'm not sure how to proceed. My biggest stumbling
I'm trying to write a script that detects if a string
is palindromic (same backward as it is forward). This
is what I have so far:
#!/usr/bin/env python
my_str = raw_input("Enter a string: ")
string_list = []
for s in my_str:
string_list.append(s)
string_list_orig = string_list
strin
I wrote a script that checks if two strings match.
The script ignores case.
#!/usr/bin/env python
string_a = raw_input("Enter a string: ")
string_b = raw_input("Enter another string: ")
if cmp(string_a.lower(), string_b.lower()) == 0:
print "The strings match!"
else:
print "The strings
I'm working on a problem in Chapter 5 of Core Python
Programming(2nd Edition). I am supposed to write a
script that take an opening balance and a monthly
payment from the user. The script then displays the
balance and payments like so:
Enter opening balance: 100
Enter monthly payment: 16.13
One of the exercises from Core Python Programmng (2nd
Edition) asks me to determine the largest and smallest
integers, float, and complex numbers my system can
handle. Using python.org and Google, I have
discovered my system's largest and smallest ingtegers:
>>> import sys
>>> sys.maxint
21474836
I wrote a script that takes a price and a sales tax
and calculates the new price.
#!/usr/bin/env python
def calculate_price(price, percent_tax):
sales_tax = price * percent_tax
new_price = price + sales_tax
return new_price
price = float(raw_input("Enter a price: "))
percent_tax = fl
I wrote a simple calculator script:
#!/usr/bin/python env
def calculator(n1, operator, n2):
f1 = float(n1)
f2 = float(n2)
if operator == '+':
return f1 + f2
elif operator == '-':
return f1 - f2
elif operator == '*':
return f1 * f2
elif operator == '
I created a script that opens an existing text file,
allows the user to write over the original contents,
and then save the file. The original contents are
then saved in a separate file. Here is the script:
#!/usr/bin/python
'editTextFile.py -- write over contents of existing
text file'
import
I've been reading 'Core Python Programming (2nd
Edition)'. I have been given the following script:
#!/usr/bin/env python
'makeTextFile.py -- create text file'
import os
# get filename
while True:
fname = raw_input('Enter file name: ')
if os.path.exists(fname):
print"*** ERROR:
I have written a script that reads and displays text
files:
#!/usr/bin/env python
'readTextFile.py -- read and display text file'
import os
# get filename
while True:
fname = raw_input('Enter file name: ')
print
if os.path.exists(fname):
fobj = open(fname, 'r')
for e
I'm working out of Core Python Programming (2nd
Edition) by Wesley Chun.
Here is the problem:
Have the user enter three numeric values and store
them in three different variables. Without using
lists or sorting algorithms, manually sort these three
numbers from smallest to largest.
Here is what
I was doodling at the interpreter:
>>> fruit = ["apples","pears","oranges"]
>>> for f in fruit:
... if f != "apples":
... print f
... print "This is not an apple."
...
pears
This is not an apple.
oranges
This is not an apple.
What I can't remember is what is 'or' in py
I've been working on a version of a script I found in
"Programming Python". The helpful users of this forum
gave me some advice to make the code less wordy. Here
is the code:
#!/usr/bin/python
import string
def find_longest_line(fileName):
line_list = [line.split() for line in open(file
I created a file called table.txt. Here is the file's
contents:
1 5 10 2 1.0
2 10 20 4 2.0 3
3 15 30 8 3 2 1
4 20 40 16 4.0
I modified a script I found in "Programming Python"
and created scri
I've been reading an old copy of "Programming Python"
and started to work on one of its challenges. I have
a text file called table.txt:
1 5 10 2 1.0
2 10 20 4 2.0 3
3 15 30 8 3 2 1
4 20 40 16
Let's say I have a series of files that are named like
so:
0001.ext
0230.ext
0041.ext
0050.ext
How would I convert these from a padding of 4 to a
padding of 1? In other words, I want the files to be
renamed as:
1.ext
230.ext
41.ext
50.ext
At first I used strip(), which was a mistake because
it
Does anyone how to remove padded numbers with python?
I want to be able to take a file like
afile.0001.cin
and convert it to
afile.1.cin
I've been checking the docs but nothing jumps out at
me.
Thanks!
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I'm trying to write a script that will rename files.
The files are in this format:
replace_dashes_stuff03
I want to rename the files to
replace.dashes.STF.v03
Here is what I have so far:
#!/usr/bin/python
import os,sys
oldFile = sys.argv[1]
if oldFile.find('_') != -1:
print "Found
Hmmm...Perl is probably a bad example. My apologies.
I was thinking more along the lines of this:
A C++ for loop:
#include
using std::cout;
int main() {
for (int i = 0; i < 10; i++) {
cout << i << "\n";
}
return 0;
}
__
Does python have foreach loops? I don't see any
mention of them in the docs. Am I going to have to
use Perl (gasp!) if I want my beloved foreach loop?
-Chris
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Here is the latest version of my Rock, Paper, Scissors
game:
#!/usr/bin/python
import random
random.seed()
class Human:
def __init__(self):
self.points = 0
self.choice = " "
def plays(self):
fromUser = raw_input("Pi
--- Tom Wilson <[EMAIL PROTECTED]> wrote:
> hi,
>
> could you please explain to me how your rock paper
> scissors game script
> works because i am a bit confused.
>
> thanks
> tom
>
>
The game does not work in its current form, which may
be some cause for confusion. :-)
In designing the pr
Here is my Rock,Paper,Scissors script:
#!/usr/bin/python
import random
random.seed()
class Human:
def __init__(self):
self.points = 0
self.choice = " "
def plays(self):
self.choice = raw_input("Pick (R)ock, (P)aper,
I have been looking for a new project to tackle when I
came across this link:
http://www.ibiblio.org/obp/pyBiblio/practice/wilson/rockpaperscissors.php.
Here is some sample output that was provided at the
webpage:
Welcome to Rock, Paper, Scissors!
How many points are required for a win? 3
Choos
Here is the complete script with documentation:
#!/usr/bin/python
#This script prompts the user for a path and a glob
pattern.
#The script firsts looks in the directory denoted by
the path
#for a matching file. If a match is found, the path
and file are added
#to a dictionary as a key and value.
I rewrote my code with Alan's suggestions in mind.
#!/usr/bin/python
import os, os.path, glob
def glob_files(pattern, base_path = '.'):
abs_base = os.path.abspath(base_path)
#path_list = []
#path_list.append(abs_base)
globbed_dict = {}
cwd = os.getcwd()
I didn't know I could place the glob in the os.walk
traversal. Could you give me an example of how to do
this?
--- Alan Gauld <[EMAIL PROTECTED]> wrote:
> >I created a function that takes a pattern and a
> base
> > path and then uses os.walk and glob to traverse
> > directories starting from the
I created a function that takes a pattern and a base
path and then uses os.walk and glob to traverse
directories starting from the base path and place
files that match the glob pattern in a dictionary.
#!/usr/bin/python
import os, os.path, glob
def glob_files(pattern, base = '.'):
path_l
I'm creating a function that traverses a directory
tree and prints out paths to files:
#!/usr/bin/python
import os, os.path, glob
def traverse(base = '.'):
for root,dirs,files in os.walk(base):
for name in files:
path = os.path.join(root, name)
I've been working through a tutorial:
http://www.ibiblio.org/obp/thinkCSpy/index.htm.
Lately, I have been learning about abstract data types
(linked lists, stacks, queues, trees, etc.). While I
do enjoy the challenge of creating these objects, I am
not sure what they are used for.
__
My brain has gone squishy. I am combining a linked
list with a priority queue. This is the last exercise
out of How To Think Like A Computer Scientist (Chapter
19).
class Node:
def __init__(self, cargo=None, next=None):
self.cargo = cargo
self.next = next
ems[maxi:maxi+1] = []
return item
--- Luke Paireepinart <[EMAIL PROTECTED]> wrote:
> Christopher Spears wrote:
> > Here is a class called PriorityQueue:
> >
> > class PriorityQueue:
> > def __init
Here is a class called PriorityQueue:
class PriorityQueue:
def __init__(self):
self.items = []
def isEmpty(self):
return self.items == []
def insert(self, item):
self.items.append(item)
After reading John's reply, I think I get it now:
>>> from linked_queue import *
>>> queue = Queue()
>>> queue.isEmpty()
True
>>> queue.insert("cargo")
>>> queue.length
1
>>> queue.insert("more cargo")
>>> queue.length
2
>>> print queue.head
cargo
>>> print queue.head.next
more cargo
>>> queue.ins
I am working out of How To Think Like A Computer
Scientist. I am on the chapter that covers linked
queues. Here is some code that creates a linked queue
class:
class Queue:
def __init__(self):
self.length = 0
self.head = None
def isEmpty(self):
I am working out of How To Think Like A Computer
Scientist. Here is the code for a module called
node.py:
def printList(node):
nodeList = []
while node:
nodeList.append(node.cargo)
node = node.next
pri
Chapter 15 of How to Think Like a Computer Scientist
teaches you how to deal with sets of objects by
creating a deck of cards. The tutorial can be found
here: http://www.ibiblio.org/obp/thinkCSpy/chap15.htm.
Here is my code so far in card.py:
class Card:
suitList = ["Clubs", "Diamonds",
I am working on another problem from "How To Think
Like A Computer Scientist". Here is a function:
def increment(time, seconds):
time.seconds = time.seconds + seconds
while time.seconds >= 60:
time.seconds = time.seconds - 60
time.minutes = time.minutes + 1
while time.minutes >= 6
I'm working on a problem from "How To Think Like A
Computer Scientist". I created a Time class:
class Time:
def __init__(self, hours, minutes, seconds):
self.hours = hours
self.minutes = minutes
self.seconds = seconds
I created a
I wrote a script that creates a gui using pygtk. The
gui consists of a vertical scrollbar and two buttons.
The user picks a number (degrees Fahrenheit) with the
scrollbar and then clicks the convert button. A
functions converts the number to its equivalent in
degrees Celsius and prints a respons
I am trying to write a GUI that consists of a
scrollbar and two buttons. One button is called
Convert, and the other is called Quit. The vertical
scrollbar represents degrees Fahrenheit starting from
212 at the top and ending at 32 at the bottom. I want
to be able to pick degrees Fahrenheit with
I made the changes that Danny suggested to my script:
#!/usr/bin/python
import os, pygtk
pygtk.require('2.0')
import gtk
class View:
def delete_event(self, widget, event, data=None):
gtk.main_quit()
return False
def button
Here is a little gui I created:
#!/usr/bin/python
import os, pygtk
pygtk.require('2.0')
import gtk
class GetCwd:
def getcwd(self, widget, data=None):
print os.getcwd()
def delete_event(self, widget, event, data=None):
gtk.main_qu
I understand this:
>
> def f(w): gtk.main_quit()
> button.connect("clicked", f)
>
> lambda simply saves cluttering up the code with lots
> of tiny function
> derfinitions which are never referred to apart from
> in the binding
> operation.
>
Now my question is what is "w"? What is being passe
I have been reading though the PyGTK tutorial.
Can anyone explain how lambda is being used in this
statement:
button.connect("clicked", lambda w: gtk.main_quit())
This code might put the statement in context:
# Create "Quit" button
66 button = gtk.Button("Quit")
67
68
I have been trying to work throught the PyGTK tutorial
using cygwin, but I have been having problems. For
example when I try to launch the helloworld.py program
(http://www.pygtk.org/pygtk2tutorial/ch-GettingStarted.html#sec-HelloWorld),
I get this:
$ python helloworld.py
No fonts found; this pr
I'm a bit embarassed to ask this...I am looking at a
tutorial for PyGTK+ that is discussing widgets. What
are widgets?
-Chris
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Does PyGTK work well on cygwin?
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How does this script work?
#!/usr/bin/python
class IteratorExample:
def __init__(self, s):
self.s = s
self.next = self._next().next
self.exhausted = 0
def _next(self):
if not self.exhausted:
flag = 0
for x in self.s:
I've been working my way through an online tutorial
and came across the following sample script:
import sys
class Writer:
def __init__(self, filename):
self.filename = filename
def write(self, msg):
f = file(self.filename, 'a')
f.write(msg)
f.close()
sys.s
I just completed an assignment out of Learning Python
in which I used the Cmd class from the cmd module to
create a little shell:
import cmd, os, shutil, sys
class shell(cmd.Cmd):
def do_EOF(self, line):
sys.exit()
def do_ls(self, line):
if line == '': dirs = [os.
I am trying to write a function that takes a
directory's name, finds any subdirectories, and then
prints out the size of the files in all found
directories.
import os, os.path
def describeDirectory(directory):
dirList = [directory]
for d in os.listdir(directory):
if os.path.isdir(
I am trying to write a function that takes a directory
name and describes the contents of the directory (file
name and size) recursively. Here is what I have
written so far:
import os, os.path
def describeDirectory(directory):
if os.listdir(directory) == []:
print "Empty directory!"
Out of Learning Python, I was given this text:
This is a paragraph that mentions bell peppers
multiple times. For
one, here is a red pepper and dried tomato salad
recipe. I don't like
to use green peppers in my salads as much because they
have a harsher
flavor.
This second paragraph mentions red
I copied this program from Learning Python and got it
to work on Windows XP:
import sys, glob
print sys.argv[1:]
sys.argv = [item for arg in sys.argv for item in
glob.glob(arg)]
print sys.argv[1:]
What the program does is first print the glob and then
a list of everything caught by the glob. For
I get it! Have printFood return a string!
def printFood(self):
return self.food.foodName
Now I don't get the weird output anymore!
-Chris
--- Danny Yoo <[EMAIL PROTECTED]> wrote:
>
> Hi Chris,
>
> I'm going to be a little insidous and bring some
> ideas from the textbook
> "
Here is some code I wrote:
class Food:
def __init__(self, name):
Food.foodName = name
class Customer:
def __init__(self,name):
Customer.name = name
Customer.food = 0
def placeOrder(self, foodName, employee):
p
I'm working on a program where a Customer orders Food
from an Employee. Here is what I have so far:
class Food:
def __init__(self, name):
Food.foodName = name
class Customer:
def __init__(self,name):
Customer.name = name
def placeOrder(self
Here is a problem I'm working on out of Learning
Python:
Make a subclass of MyList from exercise 2 called
MyListSub which extends MyList to print a message to
stdout before each overloaded operation is called and
counts the number of calls. MyListSub should inherit
basic method behavoir from MyLi
This is a class I created that wraps a list. Could
someone please critique the class?
class MyList:
def __init__(self, aList=None):
if aList is None:
self.mylist = []
else:
self.mylist = aList[:]
def _
Thanks to all of the tutors on this mailing list! I'm
finally making some headway! I originally decided to
tackle my problem one operator at a time:
class MyList:
def __init__(self, aList=None):
if aList is None:
self.mylist = []
el
> class MyList:
>def __init__(self, aList=None):
> if aList is None:
>self._list = []
> else:
>self._list = aList[:]
>
This code certainly looks like it will do the trick.
I'm just not sure what the _ in front of list (i.e.
_list) denotes.
"I'm the last person t
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