string(21) "{"docs":[],"count":0}" array(2) { ["docs"]=> array(0) { } ["count"]=> int(0) } 知识点：异常之raise - 爱码网

知识点：异常之raise

raise语句手工引发一个异常:

1 "raise" [expression ["," expression ["," expression]]]

try:
    for i in range(3):
        for j in range(3):
            if i==2:
                raise KeyboardInterrupt  #手动引发异常
            print(i,j)
except KeyboardInterrupt:
    print("退出啦")