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Old 12-07-2018, 06:24 AM   #1
Mark_667
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Find value in list of dictionaries in Python3


I have the following and have been having difficulty finding the values I need in it.

Code:
tags=[[{'Key': 'Type', 'Value': 'Test'}], 
[{'Key': 'Type', 'Value': 'Test'}], 
[{'Key': 'Type', 'Value': 'Thing-Im-looking-for'}], 
[{'Key': 'Type', 'Value': 'Multi-Value'}]]
Any advice appreciated.
 
Old 12-07-2018, 07:01 AM   #2
hydrurga
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That is an interesting-looking Python structure. Essentially it is a list for which each element is itself a list containing only one element, a dictionary. Are you sure that this is best suited for what you're trying to do?

Could you explain in English what sort of data store you're trying to create and for what purposes?
 
2 members found this post helpful.
Old 12-07-2018, 10:21 AM   #3
Beryllos
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Code:
$ python3
Python 3.2.3 (default, Mar 25 2017, 10:08:27) 
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> tags=[[{'Key': 'Type', 'Value': 'Test'}], 
... [{'Key': 'Type', 'Value': 'Test'}], 
... [{'Key': 'Type', 'Value': 'Thing-Im-looking-for'}], 
... [{'Key': 'Type', 'Value': 'Multi-Value'}]]
>>> tags[2][0]['Value']
'Thing-Im-looking-for'
>>> print(tags[2][0]['Value'])
Thing-Im-looking-for
>>> exit()
$
Edit: If you don't require the one-element lists, which hydrurga pointed out, you could remove the inner brackets and then you wouldn't need the [0] in the above code. Is that the nature of your difficulty?

Last edited by Beryllos; 12-07-2018 at 10:40 AM.
 
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