Split a generator/iterable every n items in python

Split a generator/iterable every n items in python

You can split a generator or iterable into chunks of a specific size (e.g., every n items) in Python using various methods. Here, I'll show you two common approaches: one using a generator function and the other using a third-party library called more-itertools. You can choose the method that suits your needs.

Using a Generator Function:

You can create a generator function that yields chunks of elements from the iterable:

def chunked(iterable, chunk_size): it = iter(iterable) while True: chunk = list(itertools.islice(it, chunk_size)) if not chunk: return yield chunk # Example usage: my_iterable = range(1, 11) # Example iterable chunk_size = 3 for chunk in chunked(my_iterable, chunk_size): print(chunk)

In this example:

  • chunked is a generator function that takes the iterable and chunk_size as parameters.

  • It uses itertools.islice to slice the iterable into chunks of the specified size.

  • The function yields these chunks until there are no more elements left in the iterable.

Using more-itertools Library:

The more-itertools library provides a convenient chunked function for splitting an iterable into chunks:

from more_itertools import chunked # Example usage: my_iterable = range(1, 11) # Example iterable chunk_size = 3 for chunk in chunked(my_iterable, chunk_size): print(chunk)

In this example:

  • We import the chunked function from more_itertools.

  • chunked directly splits the iterable into chunks of the specified size.

  • We iterate over the resulting chunks.

The more-itertools library simplifies the task of chunking an iterable and is a convenient option for this purpose.

Choose the method that best fits your specific use case and requirements.

Examples

  1. "Python code to split a generator into chunks of size n"

    Description: Splitting a generator into chunks of a specified size in Python can be achieved using yield with a loop. Here's a sample implementation:

    def split_generator(generator, chunk_size): chunk = [] for item in generator: chunk.append(item) if len(chunk) == chunk_size: yield chunk chunk = [] if chunk: yield chunk my_generator = (i for i in range(10)) chunk_size = 3 for chunk in split_generator(my_generator, chunk_size): print(chunk)

    This code defines a function split_generator that splits a given generator into chunks of the specified size.

  2. "Python function to split an iterable into chunks of size n"

    Description: If you want to split any iterable into chunks of a specified size in Python, you can use a generator function with slicing. Here's an example:

    def split_iterable(iterable, chunk_size): for i in range(0, len(iterable), chunk_size): yield iterable[i:i+chunk_size] my_iterable = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] chunk_size = 4 for chunk in split_iterable(my_iterable, chunk_size): print(chunk)

    This code defines a generator function split_iterable that splits any iterable into chunks of the specified size.

  3. "Python code to split a list into sublists of size n"

    Description: To split a list into sublists of a specified size in Python, you can use list comprehension with slicing. Here's how:

    def split_list(input_list, chunk_size): return [input_list[i:i+chunk_size] for i in range(0, len(input_list), chunk_size)] my_list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] chunk_size = 3 result = split_list(my_list, chunk_size) print(result)

    This code defines a function split_list that splits a given list into sublists of the specified size.

  4. "Python function to split a tuple into chunks of size n"

    Description: If you need to split a tuple into chunks of a specified size in Python, you can use a generator function with slicing. Here's an example implementation:

    def split_tuple(input_tuple, chunk_size): for i in range(0, len(input_tuple), chunk_size): yield input_tuple[i:i+chunk_size] my_tuple = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10) chunk_size = 2 for chunk in split_tuple(my_tuple, chunk_size): print(chunk)

    This code defines a generator function split_tuple that splits a given tuple into chunks of the specified size.

  5. "Python code to split a generator expression into chunks"

    Description: To split a generator expression into chunks in Python, you can use a generator function with a loop. Here's how:

    def split_generator_expression(generator_expression, chunk_size): generator = iter(generator_expression) while True: chunk = [next(generator) for _ in range(chunk_size)] if not chunk: break yield chunk my_generator_expression = (i for i in range(10)) chunk_size = 3 for chunk in split_generator_expression(my_generator_expression, chunk_size): print(chunk)

    This code defines a generator function split_generator_expression that splits a given generator expression into chunks of the specified size.

  6. "Python function to split an iterator into chunks of size n"

    Description: If you have an iterator and need to split it into chunks of a specified size in Python, you can use a generator function with a loop. Here's an example:

    def split_iterator(iterator, chunk_size): chunk = [] for item in iterator: chunk.append(item) if len(chunk) == chunk_size: yield chunk chunk = [] if chunk: yield chunk my_iterator = iter(range(10)) chunk_size = 4 for chunk in split_iterator(my_iterator, chunk_size): print(chunk)

    This code defines a generator function split_iterator that splits a given iterator into chunks of the specified size.

  7. "Python code to split a string into chunks of size n"

    Description: To split a string into chunks of a specified size in Python, you can use list comprehension with slicing. Here's how:

    def split_string(input_string, chunk_size): return [input_string[i:i+chunk_size] for i in range(0, len(input_string), chunk_size)] my_string = "abcdefghij" chunk_size = 3 result = split_string(my_string, chunk_size) print(result)

    This code defines a function split_string that splits a given string into chunks of the specified size.

  8. "Python function to split a set into chunks of size n"

    Description: If you have a set and need to split it into chunks of a specified size in Python, you can use a generator function with a loop. Here's an example:

    def split_set(input_set, chunk_size): iterator = iter(input_set) while True: chunk = [next(iterator) for _ in range(chunk_size)] if not chunk: break yield chunk my_set = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} chunk_size = 2 for chunk in split_set(my_set, chunk_size): print(chunk)

    This code defines a generator function split_set that splits a given set into chunks of the specified size.

  9. "Python code to split a dictionary into chunks of size n"

    Description: To split a dictionary into chunks of a specified size in Python, you can use dictionary comprehension with slicing. Here's how:

    def split_dictionary(input_dict, chunk_size): keys = list(input_dict.keys()) values = list(input_dict.values()) return [{keys[i]: values[i] for i in range(start, min(start + chunk_size, len(keys)))} for start in range(0, len(keys), chunk_size)] my_dict = {'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5, 'f': 6} chunk_size = 2 result = split_dictionary(my_dict, chunk_size) print(result)

    This code defines a function split_dictionary that splits a given dictionary into chunks of the specified size.

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