Python aggregate list of dictionaries
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I have a list of dictionaries which I need to aggregate in Python: Show and I'm looking to aggregate based on budgetImpressions. So the final result should be: Note every entry with a certain campaignName will always have the same corresponding campaignCfid, startDate and endDate. Can this be done in Python? I've tried using itertools without much success. Would it be a better approach to use Pandas? The itertools function in Python provides an efficient way for looping lists, tuples and dictionaries. The itertools.groupby function in itertools will be applied in this tutorial to group a list of dictionaries by a particular key. To illustrate how this works, we will look at a list of students info (in dictionaries) and try to group these by “class” key such… Group List of Dictionary Data by Particular Key in Python can be done using itertools.groupby() method. Itertools.groupby()This method calculates the keys for each element present in iterable. It returns key and iterable of grouped items.
Let’s see the examples: Example 1: Suppose we have list of dictionary of employee and company. INFO = [
{'employee': 'XYZ_1', 'company': 'ABC_1'},
{'employee': 'XYZ_2', 'company': 'ABC_2'},
{'employee': 'XYZ_3', 'company': 'ABC_3'},
{'employee': 'XYZ_4', 'company': 'ABC_3'},
{'employee': 'XYZ_5', 'company': 'ABC_2'},
{'employee': 'XYZ_6', 'company': 'ABC_3'},
{'employee': 'XYZ_7', 'company': 'ABC_1'},
{'employee': 'XYZ_8', 'company': 'ABC_2'},
{'employee': 'XYZ_9', 'company': 'ABC_1'}
]Now we need to display all the data group by the ‘company’ key name. Code: Python3
Output:
Example 2: Suppose we have list of dictionary of student grades and marks. students = [
{'mark': '65','grade': 'C'},
{'mark': '86','grade': 'A'},
{'mark': '73','grade': 'B'},
{'mark': '49','grade': 'D'},
{'mark': '91','grade': 'A'},
{'mark': '79','grade': 'B'}
]Now we need to display all the data group by the ‘grade’ key. Code: Python3
Output: A
{'mark': '86', 'grade': 'A'}
{'mark': '91', 'grade': 'A'}
B
{'mark': '73', 'grade': 'B'}
{'mark': '79', 'grade': 'B'}
C
{'mark': '65', 'grade': 'C'}
D
{'mark': '49', 'grade': 'D'}How to group list of dictionaries in python?Group List of Dictionary Data by Particular Key in Python can be done using itertools. groupby() method.
Can Python have a list of dictionaries?In Python, you can have a List of Dictionaries. You already know that elements of the Python List could be objects of any type. In this tutorial, we will learn how to create a list of dictionaries, how to access them, how to append a dictionary to list and how to modify them.
Can we combine dictionaries if so how?You can merge two dictionaries using the | operator. It is a very convenient method to merge dictionaries; however, it is only used in the python 3.9 version or more.
How do you sort a list in python dictionary?To sort a list of dictionaries according to the value of the specific key, specify the key parameter of the sort() method or the sorted() function. By specifying a function to be applied to each element of the list, it is sorted according to the result of that function.
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