Python multithreaded start up...-CodePudding

 import threading 
The import time 

Sum=0 
The lock=threading. The lock () 

Class My_Thread (threading. Thread) : 
Def __init__ (self, start, end) : 
Super () __init__ () 
Self. Start=start 
The self. The end=end 
Self. Part_sum=0 
Def run (self) : 
For I in range (self. The start, the self. The end + 1) : 
Self. Part_sum +=I 
Lock. Acquire () 
Global sum 
The sum +=self. Part_sum 
The lock release () 

If __name__=="__main__ ': 
Start=time. Time () 

Target_num=10000 
Thread_list=[] 

I=0 
The interval=1000 

While True: 
If I + interval> Target_num: 
Thread_list. Append (My_Thread (I + 1, target_num)) 
Break 
The else: 
Thread_list. Append (My_Thread (I + 1, I + interval)) 
I +=interval 

For single_thread thread_list in: 
Single_thread. Start () 

For single_thread thread_list in: 
Single_thread. The join () 

End=time. Time () 
Print (" time "+ STR (end - start) +" seconds ")

Error message:
PS D: \ VSCproject> & C:/Users/dragon/AppData/Local/designed/Python/Python38/Python. Exe d:/VSCproject/Python/test1. Py
Traceback (the most recent call last) :
The File "d:/VSCproject/python/test1. Py", line 39, in & lt; module>
Single_thread. Start ()
TypeError: 'int' object is not callable
PS D: \ VSCproject>

Good folks, this is where I went wrong?