How to pass single parameter and multiple parameters to python thread pool ThreadPoolExecutor

Python thread pool ThreadPoolExecutor, passing single parameter and multiple parameters

This is the thread pool passing a single parameter

from concurrent.futures import ThreadPoolExecutor,as_completed
def test(a):
        print(a)

qq = {"a":"1","b":"2","c":"3"}
with ThreadPoolExecutor() as pool:
    for j ,k in qq.items():
        res = pool.submit(test,j)
        kk = res.result()

The following is The main method of passing multiple parameters is pool.submit(lambda cxp:test(*cxp),(j,k))

This line of code needs to be disassembled and viewed

The first is the anonymous function: lambda cxp:test(*cxp) This is the first step

This means: pass the cxp parameter to test

The second step is submit(lambda cxp:test(cxp),(j,k))

sumbit method requires passing two parameters, the first one is function, the second one is the parameter of this function

The anonymous function just now is the first parameter, and then (j,k) is the second parameter. This parameter is to be passed to the function, so (j,k ) gives cxp

python thread pool to pass in multiple parameters ThreadPoolExecutor.submit multi-parameter support

from concurrent.futures import ThreadPoolExecutor,as_completed
def test(a,b):
        print(a,b)

qq = {"a":"1","b":"2","c":"3"}
with ThreadPoolExecutor() as pool:
    for j ,k in qq.items():
        res = pool.submit(lambda cxp:test(*cxp),(j ,k))
        last= res.result())

The above is the detailed content of How to pass single parameter and multiple parameters to python thread pool ThreadPoolExecutor. For more information, please follow other related articles on the PHP Chinese website!