Programming Forums > Script Programming > Python

dragon2041 · Jul 13th, 2008, 9:20 PM

I have a small problem with lists in python. I need ot know the best way to effectively delete an item from a list. For example, take the following list:

list = ["One", "Two", "Three", "Four"]

I want to delete, say, the number two. What i currently do is:

count = -1

for number in list:
count +=1
if number = "Two":
break

del list[count]

It works for me, but i'm wondering if there is a less clunky way to perform the same operation.

Sane · Jul 13th, 2008, 9:26 PM

 Python Syntax (Toggle Plain Text) 
list = ["One", "Two", "Three", "Four"]
list.remove("Two")
print list
list = ["One", "Two", "Three", "Four"]
list.remove("Two")
print list

['One', 'Three', 'Four']

A fast way you could have found this answer is by printing the following in the Python command line:

(Toggle Plain Text)

mylist = []
dir(mylist)
help(mylist)

dragon2041 · Jul 13th, 2008, 9:36 PM

thank you. I'm new to python so i dont know much. I found the function remove, thanks again.

Jul 13th, 2008, 9:20 PM	#1
dragon2041 Newbie Join Date: Jul 2008 Posts: 2 Rep Power: 0	Deleting Items from Lists I have a small problem with lists in python. I need ot know the best way to effectively delete an item from a list. For example, take the following list: list = ["One", "Two", "Three", "Four"] I want to delete, say, the number two. What i currently do is: count = -1 for number in list: count +=1 if number = "Two": break del list[count] It works for me, but i'm wondering if there is a less clunky way to perform the same operation.

Jul 13th, 2008, 9:26 PM	#2
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,886 Rep Power: 5	Re: Deleting Items from Lists Python Syntax (Toggle Plain Text) list = ["One", "Two", "Three", "Four"] list.remove("Two") print list list = ["One", "Two", "Three", "Four"] list.remove("Two") print list `['One', 'Three', 'Four']` A fast way you could have found this answer is by printing the following in the Python command line: (Toggle Plain Text) mylist = [] dir(mylist) help(mylist) mylist = [] dir(mylist) help(mylist) __________________ Waterloo's Canadian Computing Competition (CCC) - Stage 2 Problems, Solutions, and Test Data

Jul 13th, 2008, 9:36 PM	#3
dragon2041 Newbie Join Date: Jul 2008 Posts: 2 Rep Power: 0	Re: Deleting Items from Lists thank you. I'm new to python so i dont know much. I found the function remove, thanks again.

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Programming Forums > Script Programming > Python

Deleting Items from Lists