Python

Problem with nested list

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Join Date: Dec 2007

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laspal

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Newbie Poster

Problem with nested list

Oct 10th, 2008

Hi,
I am having the problem in nested list.
Here is the code :

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
data1= [['Contacts',company.contacts.count() ],
        ['Notes', company.notes.count()],
        ['Met by', ],
        ['Industry', industry],
        ['Financial Investors', '31']]
 
for item in metlist:
   data1[2].insert(1,item)
data1= [['Contacts',company.contacts.count() ],
        ['Notes', company.notes.count()],
        ['Met by', ],
        ['Industry', industry],
        ['Financial Investors', '31']]

for item in metlist:
   data1[2].insert(1,item)

Basically I am trying to insert the value for Met by in [ 'Met by', metlist->value]

I am getting list index out of range error.
Can any one help me out.

Thanks

Last edited by vegaseat; Oct 12th, 2008 at 11:21 am. Reason: added code tags [code=python] ... [/code]

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Join Date: Oct 2008

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dittmarw

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Re: Problem with nested list

Oct 10th, 2008

I think what you're trying to do is:

for item in metlist:
data1[2].append(item)

To see what you did won't work, try typing data1[2]. It gives you ['Met by']..thus there is only one element, and nothing at position 1.

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jlm699

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Knows where his Towel is

Re: Problem with nested list

Oct 10th, 2008

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Originally Posted by dittmarw

I think what you're trying to do is:

for item in metlist:
data1[2].append(item)

To see what you did won't work, try typing data1[2]. It gives you ['Met by']..thus there is only one element, and nothing at position 1.

While I agree with you that he should be using append instead of insert, I don't believe that his error is being caused by there only being one element:

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
>>> d = ['a']
>>> d.insert(1,'b')
>>> d
['a', 'b']
>>> d = ['a']
>>> d.insert(1,'b')
>>> d
['a', 'b']

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Join Date: Oct 2004

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vegaseat

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DaniWeb's Hypocrite

Re: Problem with nested list

Oct 12th, 2008

Something like this might do ...

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
# converted certain variables to strings for testing only
data1= [['Contacts', 'company.contacts.count()'],
        ['Notes', 'company.notes.count()'],
        ['Met by', ],
        ['Industry', 'industry'],
        ['Financial Investors', '31']]
 
data2 = []
for item in data1:
    #print item, len(item)  # for testing
    if len(item) < 2:
        item.insert(1, 'missing value')
    data2.append(item)
 
print data2
 
"""
my output -->
[['Contacts', 'company.contacts.count()'],
['Notes', 'company.notes.count()'],
['Met by', 'missing value'],
['Industry', 'industry'],
['Financial Investors', '31']]
"""
# converted certain variables to strings for testing only
data1= [['Contacts', 'company.contacts.count()'],
        ['Notes', 'company.notes.count()'],
        ['Met by', ],
        ['Industry', 'industry'],
        ['Financial Investors', '31']]

data2 = []
for item in data1:
    #print item, len(item)  # for testing
    if len(item) < 2:
        item.insert(1, 'missing value')
    data2.append(item)

print data2

"""
my output -->
[['Contacts', 'company.contacts.count()'],
['Notes', 'company.notes.count()'],
['Met by', 'missing value'],
['Industry', 'industry'],
['Financial Investors', '31']]
"""