Python Forum

As said before I'm new to programming, and I need in depth explaination to understand everything the way I want to know it, call it a personality quirk ;p. With pop() you remove the last element of a list and return its value: Now I know list is a bad name, but for the sake of arguement lets assume its not a built in sequence> 'example'

Hi, I have a dictionary whose keys are variables. Eg: - dict=None dict=value Here lst and values are 2 variables. How can I make the key as the value of lst. For eg:- if lst="node1" and if value = 10, this is what i needs.. dict=10

f = open('myfile.bin', 'rb') How do I know if there was an error opening my file?

Is it possible to append a new Path to some file permanently? It seems like a sys.path.append('/my/new/path') statement is temporary. In other words, where and in what file on a Win32 box or Linux box is the sys.path info kept. I have a couple of paths I keep practice files in I want to add to the path permanently. Thanks

Hi There, I'm sure I have done this before, but cannot remember how, or find out how to do it quickly - but is there a way/function/something in python to make all the letters of a raw_input() string small/capital letters? Thanks! -- Merrigan

Hello All, I have a tab separated input file (data.txt) in text format - the file looks like this SCHOOL DEPART1 DEPART2 DEPART3 Harvard Economics Mathematics Physics Stanford Mathematics Physics Berkeley Physics U.C.L.A Biology Genetics

Alright well i've been working at this for a ridiculously longer amount of time than i think i should have been, so i finally gave up and that's why im here. I program in C++ and hardly do any python.. ever. So i need a little help and hope you all will be kind enough to throw some knowledge my way. What i need to do, is count the files in the...

Maybe this is a very primative question, but I just get a bit confused about 'set' and 'Set' module in python. I understand 'set' is a build in type in python after 2.4(or 2.3) and Set a seperate module, anyhow, I gonna use build in 'set'. then the question is how can I declare a empty set variable as a 'var= ' do to a list variable?

I have two lists which I want to use to create a dictionary. List x would be the keys, and list y is the values. x = y = Any suggestions? looking for an efficent simple way to do this...maybe i am just having a brain fart...i feel like this is quit simple. thanks.

I want to round a list of numbers to basically remove all the decimal places or even just convert them to integers. So this is what I've tried and I just can't get this to work. myList = #declare my list for i in range(len(myList)): myList == round(i,0) #tries to round all numbers. print myList

How do I do the following unix command: mkdir -m770 test with the os.mkdir command. Using os.mkdir(mode=0770) ends with the incorrect permissions. Thanks, VJ

Hi, I have performed a fit to data using scipy's 'leastsq' function. However, I wanted to be able to weight the fit by individual errors on the data points. Here is an example of what I'm doing at the moment : # fitting functions for the data fitfunc = lambda p,x: p + p*x

Hey guys, I don't understand why this isn't working for me. I'd like to be able to do this. Is there another short alternative to get this intersection? >>> set().intersection() Traceback (most recent call last): File "<interactive input>", line 1, in ? TypeError: dict objects are unhashable

Hi, I am using RedHat Linux 4. and I developed an oracle 10g based application by using cx_Oracle (cx_Oracle-4.1-10g-py23-1.i386.rpm) and Python 2.3.4. When I run the application through direct console connection, It works perfect. But, when I schedule a crontab job to run the application, It logs this

What gives ? >>> a = >>> def f(): return a >>> f() >>> a.append(3) >>> f()

Python 2.3 Windows XP We have a builtin module 'point'. I am trying to determine a better way to check the type of a list of 'point' objects. A point object is created:from point import Point pt1 = Point(x_coord, y_coord, z_coord) print type(pt1) <type 'point'> print dir(pt1) Original code: def chk_type(p_list): ...

Hi, How do i add a drop down box with few pre-populated strings in the same? I could find list box and drop down menu in the HELP document of Python, but not drop down box. Please help me in this. Thanks, BK

Hello World! (yes, I am a completely new to the programming scene, and this is my first post ever) Working in Python, I want to create a separate .txt file for each of the items in a list of strings. Simplified setup: list = type(list) type(list) type(list) for item in list: g = open(item,'w')

Hi everyone, I'm wondering whether it's possible to construct a binary-tree using python. Since python don't have pointer, it can't dynamically allocate memory like C language. But some important data structures like linked list, binary-tree and hash table are closely linked with dynamic memory technology. Any help that can be provided...

Is there a better way to append certain chars in a string with a backslash that the example below? chr = "#$%^&_{}" # special chars to look out for str = "123 45^ & 00 0_" # string to convert n = "" # init new string for i in str: if i in chr: # if special character in str n+='\\' # append...

Searching this forum I found an example of running Unix commands from Python;I wonder if there is a way to get the output of windows commands on a string using Python.Thanks in advance; Miago.

Hi. I'm extremely new to Python and programming as a whole. I have written a python script with the assistance of ESRI ArcGIS 9.2, which uses Python 2.4.1, however, it gives me this error when I try to run it. I've already posted at ESRI support, and I was hoping that Python people could help me more. I hope there is something simple I...

I'm sure there must be a better way to do this: try: if item.page: DoSomething() except AttributError: pass Is there a simple way to check if item has "page" as one of its attributes?

HI, this is my code params = {} params = '*****'; params = '***'; params = '**********'; params = '******'; params = '****';

I could've sworn python had such a command, but now I can't find it... I'm looking for an easy way to perform a UNIX-style "touch", to update the modification time of a file without actually modifying it. I could do something (I imagine) like opening the file for appending and then immediately closing it, but that doesn't seem like a good...