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foreach

foreach is a tiny Python package that provides a parallel for loop implementation using multiprocessing.

Installation

You can install the package using pip:

pip install foreach

Usage

from foreach import foreach

def square(x):
    return x**2

params = [1, 2, 3, 4, 5]
result = foreach(square, params)
print(result)
# [1, 4, 9, 16, 25]

foreach Parameters

foreach(func: Callable, params: Iterable, parallel: bool = True, num_processes: int = None, callback: Callable = None) -> List
  • func (callable): The function to apply to each element.
  • params (iterable): The iterable of parameters to apply the function to.
  • parallel (bool): If True, use multiprocessing for parallel execution. Default is True.
  • num_processes (int): Number of processes to use in parallel execution (default is None, letting Pool decide).
  • callback (callable): Optional callback function to execute after each iteration.

Returns:

  • List: A list of results from applying the function to each element.

Examples

Sequential Execution

from foreach import foreach

def square(x):
    return x**2

params = [1, 2, 3, 4, 5]
result = foreach(square, params, parallel=False)
print(result)
# [1, 4, 9, 16, 25]

Callback Functionality

from foreach import foreach

def square(x):
    return x**2

params = [1, 2, 3, 4, 5]

def callback(x):
    print(f"Processed: {x}")

result = foreach(square, params, callback=callback)
# Processed: 1
# Processed: 4
# Processed: 9
# Processed: 16
# Processed: 25

Customizing Number of Processes

from foreach import foreach

def square(x):
    return x**2

params = [1, 2, 3, 4, 5]
result = foreach(square, params, num_processes=2)
print(result)
# [1, 4, 9, 16, 25]

License

This project is licensed under the MIT License - see the LICENSE file for details.

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