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POWhat is the Pythonic way to merge 2 lists of tuples and add the nonunique values in the tuples?
 

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  1. POWhat is the Pythonic way to merge 2 lists of tuples and add the nonunique values in the tuples?
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    <p>I am looking for the best way to refactor the Python code below. I think there is a Pythonic way to do this in 2 or 3 lines of code, but couldn't figure it out. I have searched Stackoverflow but couldn't find similar problems and solutions. Many thanks!</p> <pre><code>list1 = [(Python, 5), (Ruby, 10), (Java, 15), (C++, 20)] list2 = [(Python, 1), (Ruby, 2), (Java, 3), (PHP, 4), (Javascript, 5)] # I want to make an unsorted list3 like this # list3 = [(Python, 6), (Ruby, 12), (Java, 18), (PHP, 4), (Javasript, 5), (C++, 20)] common_keys = list(set(dict(list1).keys()) &amp; set(dict(list2).keys())) if common_keys: common_lst = [(x, (dict(list1)[x] + dict(list2)[x])) for x in common_keys] rest_list1 = [(x, dict(list1)[x]) for x in dict(list1).keys() if x not in common_keys] rest_list2 = [(x, dict(list2)[x]) for x in dict(list2).keys() if x not in common_keys] list3 = common_lst + rest_list1 + rest_list2 else: list3 = list1 + list2 </code></pre>
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    1. PTQuestion
    1. USagf
    1. USLi Xiong
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    1. COWhy are they lists of tuples rather than dicts in the first place?
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      1. POWhat is the Pythonic way to merge 2 lists of tuples and add the nonunique values in the tuples?
      1. USIgnacio Vazquez-Abrams
    2. COThey are Django values_lists :)
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      1. POWhat is the Pythonic way to merge 2 lists of tuples and add the nonunique values in the tuples?
      1. USLi Xiong
    3. COThen why aren't you doing this in the ORM?
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      1. POWhat is the Pythonic way to merge 2 lists of tuples and add the nonunique values in the tuples?
      1. USIgnacio Vazquez-Abrams
 

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