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异常处理学习

admin 11月 12, 2020 0

异常处理学习学习笔记

异常处理学习

try:
检测范围
except Exception[as reason]:
出现Exception后处理的代码
finally:
无论如何都会被执行的代码

e.g.

try:
	f = open('test.txt','w')
	f.write(sum)
	sum = 1 + 1
	print(sum)
except (SyntaxError,TypeError,IndentationError) as reason:
	print('Your error is :n' + str(reason) +'n error type is:n' + str(type(reason)))
finally:
	f.close()

try:
	f = open('test.txt','w')
	f.write(sum)
	sum = 1 + 1
	print(sum)
except Exception as reason:
	print('Your error is :n' + str(reason) +'n error type is:n' + str(type(reason)))
finally:
	f.close()

主动抛出异常：

>>> raise TypeError
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError