#异常
try:print(5/0)
except ZeroDivisionError:print("You can't divide by zero!")#else 代码块
try:answer = print(5/0.99)
except ZeroDivisionError:print("You can't divide by zero!")
else:print(answer)#处理FileNotFoundError
filename = 'alice.txt'
try:with open(filename) as file_object:contents = file_object.read()
except FileNotFoundError:print(f"Sorry, the file {filename} does not exist.")#静默失败
filename = 'alice.txt'
try:with open(filename) as file_object:contents = file_object.read()
except FileNotFoundError:pass
else:print(contents)