[python3 实用教程]使用ctypes模块调用运行c代码

#include<stdio.h>

long my_app(long a){
    long ret = 0;
    
    for(long i=0; i<a; i++){
        ret += 2;
    }
    
    return(ret);
}

gcc demo.c -shared -o lib_app.so

import time
from ctypes import *

myso = CDLL("/Users/yss/Demo/python3/ctype_demo/lib_app.so")
ts = time.time()
c = myso.my_app(100000000)
print("time spend ",time.time()-ts,c)

def my_add(a):
    ret = 0
    for i in range(a):
        ret += 2
    return(ret)

ts = time.time()
d = my_add(100000000)
print("time spend ",time.time()-ts,d)

(base) yansongdeMacBook-Pro:ctype_demo yss$ python3 demo1.py
time spend  0.1458289623260498 200000000
time spend  5.0953381061553955 200000000