#### 第一次尝试 ~~~ import time start_time = time.time() # 注意是三重循环 for a in range(0, 1001): for b in range(0, 1001): for c in range(0, 1001): if a**2 + b**2 == c**2 and a+b+c == 1000: print("a, b, c: %d, %d, %d" % (a, b, c)) end_time = time.time() print("elapsed: %f" % (end_time - start_time)) print("complete!") ~~~ 运行结果： ~~~ a, b, c: 0, 500, 500 a, b, c: 200, 375, 425 a, b, c: 375, 200, 425 a, b, c: 500, 0, 500 elapsed: 214.583347 complete! ~~~ **注意运行的时间:214.583347秒**