python-异常（笔记）

#后续代码可以正常运行
try:
   f= open("xxx.txt","r",encoding='utf-8')

except:
    print("except error")

#捕获指定异常，其他异常报错程序中止，管不到
try:
   print(name)
except NameError as you_call:
    print("name error")

#打印异常
try:
   print(name)
except NameError as you_call:
    print(f"name error {you_call}")

name error name 'name' is not defined

try:

   f=1/0
except (NameError,ZeroDivisionError) as you_call:
    print(f"name or math error {you_call}")

name or math error division by zero



try:

   print(name)
except (NameError,ZeroDivisionError) as you_call:
    print(f"name or math error {you_call}")

name or math error name 'name' is not defined

#捕获所有的异常（某行代码出错就会被捕获到）
import math

try:
    
    math.e()
except Exception as e:
    print(f"error {e}")

error 'float' object is not callable

异常的传递性：