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POhow to calculate startdate and enddate from basic from multiple dictionaries to list of dictionary
 

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  1. POhow to calculate startdate and enddate from basic from multiple dictionaries to list of dictionary
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    <p><i>How to get from multiple dictionary to list of dictionary and need to calculate startdate and enddate from basic</i></p> <pre><code>[{'basic': 1000.0, 'end_date': '2011-01-31', 'start_date': '2011-01-01'}, {'basic': 1000.0, 'end_date': '2011-05-31', 'start_date': '2011-05-01'}, {'basic': 2000.0, 'end_date': '2012-01-31', 'start_date': '2012-01-01'}, {'basic': 2000.0, 'end_date': '2012-05-31', 'start_date': '2012-05-01'}, {'basic': 2500.0, 'end_date': '2012-07-31', 'start_date': '2012-07-01'}, {'basic': 2500.0, 'end_date': '2012-08-31', 'start_date': '2012-08-01'}, {'basic': 3500.0, 'end_date': '2013-01-31', 'start_date': '2013-01-01'}, {'basic': 3500.0, 'end_date': '2013-02-28', 'start_date': '2013-02-01'}, {'basic': 4000.0, 'end_date': '2013-11-30', 'start_date': '2013-11-01'}] </code></pre> <p>if the basic amount equal i need to combine the equal amount dictionaries and start_date is begin date and end_date is end of year date</p> <p>say for an example </p> <pre><code>{'basic': 1000.0, 'end_date': '2011-01-31', 'start_date': '2011-01-01'}, {'basic': 1000.0, 'end_date': '2011-05-31', 'start_date': '2011-05-01'}, </code></pre> <p>two dictionary equal so i need to get like this </p> <pre><code>[{'basic': 1000.0, 'start_date': '2011-01-01', 'end_date': '2011-12-31',}, {'basic': 2000.0, 'start_date': '2012-01-01', 'end_date': '2012-06-31', }, {'basic': 2500.0, 'start_date': '2012-07-01', 'end_date': '2012-12-31',}, {'basic': 3500.0, 'start_date': '2013-01-01', 'end_date': '2013-10-31'}, {'basic': 4000.0, 'start_date': '2013-11-01', 'end_date': '2013-12-30'}] </code></pre>
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    1. COOne approach is store the info in a dictionary like this: `{1000.00: {'min': '2011-01-01', 'max': '2011-01-01'}, 2000.00: {'min': '2011-01-01', 'max': '2011-01-01'}}` You build this by iterating through the list, add an entry to the dict for each value you haven't encountered before. update min value if a start_date is lower than the previous value, add a max value if the end_date is higher. At the end you can iterate through the dict and turn it into a list of dictionaries.
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      1. USChrisGuest
 

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