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sure! in python, you can use the `itertools.groupby` function to group data based on a common key. this function takes an iterable and a key function as input, and it returns an iterator that generates consecutive keys and groups from the input iterable.

here is a step-by-step tutorial on how to use `itertools.groupby` to group data in python:

1. import the `itertools` module:


2. create a list of data that you want to group:


3. sort the data based on the key you want to group by (optional but recommended for `itertools.groupby` to work correctly):


4. use `itertools.groupby` to group the data by the specified key:


5. iterate over the grouped data and print the groups:


here is the complete code example:



when you run this code, it will group the data based on the 'category' key and print the values in each group. this is a useful technique for analyzing and processing grouped data in python using `itertools.groupby`.

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