Re: array matching
Bill Jordan wrote:
Hey guys,
I am sorry if this is not the right list to post some questions. I
have a simple question please and would appreciate some answers as I
am new to Python.
I have 2 D array: test = [[A,1],[B,2],[A,3][B,4]]
I want to arrang this array in different arrays so each one will have
what is attached to. For example I want the output:
A =[1,3] and B=[2,4]
Thanks,
Bill
Did you try anything before asking ? this is a pretty simple problem.
test = [['A',1],['B',2],['A',3], ['B',4]]
arranged ={} # dictionary containing the arranged arrays
for name, value in test: # you better be sure all arrays contain only 2
elements
if name in arranged:
arranged[name].append(value)
else:
arranged[name] = [value]
print arranged
out: {'A': [1, 3], 'B': [2, 4]}
JM
--
http://mail.python.org/mailman/listinfo/python-list
array matching
Hey guys, I am sorry if this is not the right list to post some questions. I have a simple question please and would appreciate some answers as I am new to Python. I have 2 D array: test = [[A,1],[B,2],[A,3][B,4]] I want to arrang this array in different arrays so each one will have what is attached to. For example I want the output: A =[1,3] and B=[2,4] Thanks, Bill -- http://mail.python.org/mailman/listinfo/python-list
Re: array matching
Bill Jordan wrote: Hey guys, I am sorry if this is not the right list to post some questions. I have a simple question please and would appreciate some answers as I am new to Python. I have 2 D array: test = [[A,1],[B,2],[A,3][B,4]] I want to arrang this array in different arrays so each one will have what is attached to. For example I want the output: A =[1,3] and B=[2,4] Build a dict of lists, ie the key is the first member of the sublist and the value is a list of second members of the sublist. -- http://mail.python.org/mailman/listinfo/python-list
Re: array matching
On 29-Apr-10 14:46 PM, MRAB wrote: Bill Jordan wrote: Hey guys, I am sorry if this is not the right list to post some questions. I have a simple question please and would appreciate some answers as I am new to Python. I have 2 D array: test = [[A,1],[B,2],[A,3][B,4]] I want to arrang this array in different arrays so each one will have what is attached to. For example I want the output: A =[1,3] and B=[2,4] Build a dict of lists, ie the key is the first member of the sublist and the value is a list of second members of the sublist. You might consider numpy, which is designed for arrays. Colin W. -- http://mail.python.org/mailman/listinfo/python-list
RE: [melbourne-pug] array matching
You could use dictionary of lists
test = {
A: [1, 3],
B: [2, 4]
}
print test[A]
[1, 3]
test[A].append(5)
print test[A]
[1, 3, 5]
Cheers,
Fil
_
From: melbourne-pug-bounces+filipz=3g.nec.com...@python.org
[mailto:melbourne-pug-bounces+filipz=3g.nec.com...@python.org] On Behalf Of
Bill Jordan
Sent: Friday, 30 April 2010 3:58 AM
To: python-...@python.org; python-list@python.org; bangpyp...@python.org;
melbourne-...@python.org; portl...@python.org
Subject: [melbourne-pug] array matching
Hey guys,
I am sorry if this is not the right list to post some questions. I have a
simple question please and would appreciate some answers as I am new to
Python.
I have 2 D array: test = [[A,1],[B,2],[A,3][B,4]]
I want to arrang this array in different arrays so each one will have what
is attached to. For example I want the output:
A =[1,3] and B=[2,4]
Thanks,
Bill
--
http://mail.python.org/mailman/listinfo/python-list
Re: [melbourne-pug] array matching
Anyone responding to this thread, please delete python-dev and gmane.comp.python.dev from the followup list of where your response is sent. It should never have been part of this overly cross-posted thread. -- http://mail.python.org/mailman/listinfo/python-list
