parallel-execute
Python wrappers for easy multiprocessing and threading.
Run multiple functions in parallel using parallel-execute
Installation
pip install parallel-execute
Usage Example
1. Create a loom:
This takes a number of tasks and executes them using a pool of threads/process.
- To use threading
from pexecute.thread import ThreadLoom
loom = ThreadLoom(max_runner_cap=10)
- To use multiprocessing
from pexecute.process import ProcessLoom
loom = ProcessLoom(max_runner_cap=10)
max_runner_cap: is the number of maximum threads/processes to run at a
time. You can add as many as functions you want, but only n
functions will run at a time in parallel, n
is the max_runner_cap
2. Add tasks in loom
- Add a function in loom using add_function
loom.add_function(f1, args1, kw1)
loom.add_function(f2, args2, kw2)
loom.add_function(f3, args3, kw3)
- Add multiple functions together using add_work method
work = [(f1, args1, kwargs1), (f2, args2, kwargs2), (f3, args3, kwargs3)]
loom.add_work(work)
3. Execute all tasks
After adding tasks, calling execute will return a dictionary of results corresponding to the keys or the order in which the tasks were added.
output = loom.execute()
key is the order in which the function was added and value is the return data of the function.
# Example:
def fun1():
return "Hello World"
def fun2(a):
return a
def fun3(a, b=0):
return a+b
loom.add_function(fun1, [], {})
loom.add_function(fun2, [1], {})
loom.add_function(fun3, [1], {'b': 3})
output = loom.execute()
>>> output
{
0: {'output': 'Hello World',
'got_error': False,
'error': None,
'started_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 395002),
'finished_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 396500),
'execution_time': 0.001498,
},
1: {'output': 1,
'got_error': False,
'error': None,
'started_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 396590),
'finished_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 397651),
'execution_time': 0.001061
},
2: {'output': 4,
'got_error': False,
'error': None,
'started_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 400323),
'finished_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 401749),
'execution_time': 0.001426
}
}
We can also provide a key to store the function return data.
# Example:
loom.add_function(fun1, [], {}, 'key1')
loom.add_function(fun2, [1], {}, 'fun2')
loom.add_function(fun3, [1], {'b': 3}, 'xyz')
output = loom.execute()
>>> output
{
'key1': {'output': 'Hello World',
'got_error': False,
'error': None,
'started_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 395002),
'finished_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 396500),
'execution_time': 0.001498,
},
'fun2: {'output': 1,
'got_error': False,
'error': None,
'started_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 396590),
'finished_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 397651),
'execution_time': 0.001061
},
'xyz': {'output': 4,
'got_error': False,
'error': None,
'started_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 400323),
'finished_time': datetime.datetime(2019, 6, 28, 19, 44, 58, 401749),
'execution_time': 0.001426
}
}