Python异常处理操作实例详解

>>>whileTrue:
try:
x = int(input("Please enter a number: "))
break
exceptValueError:
print("Oops! That was no valid number. Try again ")
Please enter a number: y
Oops!That was no valid number.Try again
Please enter a number:1.3
Oops!That was no valid number.Try again
Please enter a number:5

except (RuntimeError, TypeError, NameError):
    pass

>>>import os
>>>try:
f = open('myfile.txt')
s = f.readline()
i = int(s.strip())
exceptOSErroras err:
print("OS error: {0}".format(err))
exceptValueError:
print("Could not convert data to an integer.")
except:
print("Unexpected error:", sys.exc_info()[0])
raise
OS error:[Errno2]No such file or directory:'myfile.txt'

>>>try:
f = open('a.txt','r')
exceptIOError:
print('cannot open')
except:
print('other ERR')
else:
print('file close')
f.close()
cannot open

>>>def this_fails():
x =1/0
>>>try:
this_fails()
exceptZeroDivisionErroras err:
print('Handling run-time error:', err)
Handling run-time error: division by zero