异常处理

一.异常处理的几种情况

# try ... except

try:
    print("haha")
except  NameError as e:
    print(type(e))

# try ... except ... else

try:
    name
    print("haha")
except  NameError as e:
    print(type(e))
else:   # 遇到错误就不执行后面的,没遇到错误就执行else后面的
    print('我去')

# try ... finally

try:
   print("哈哈哈")
finally:   # 遇没遇到错误都执行后面的内容
    print('我去')

# try ... except ... finally

try:
    aaa
    print("哈哈哈")
except :
      print("错误")
finally:   # 遇没遇到错误都执行
     print('我去')

# try ... except ... else ... finally

try:
    aaa
    print("哈哈哈")
except Exception as e:
      print("错误")
else:
    print("666")
finally:   # 遇到错误就不执行后面的,没遇到错误就执行else后面的
     print('我去')

二.主动抛出异常

　　raise 

三.断言

assert 1==1# 只能接受一个布尔值 False

print(123456)