MultiThread in Python

multiThread.py

'''

threading
    1. No return
    2. Can run seperatr function
concurrent.futures
    1. Return
    2. Only run 1 Function in 1 map
'''

from concurrent.futures import *
import threading
import time 

l=[]
def fn(i):
    print(f"{threading.get_native_id()}")
    time.sleep(i)
    l.append(i)
    return i

t1=threading.Thread(target=fn,args=(1,))
t1.start()
t1.join()

with ThreadPoolExecutor(2) as e:
    res=e.map(fn,[2,3])
for i in res:print(i)
print(l)