2022-09-29 学习Python-Day15
异常处理，是项目施工中常见问题，要多多注意P57-P58{:10_332:}#######################################P57
'''
捕获处理异常
'''
try:
1/0
except:
print('出错了1')
try:
print(1/1)
except:
print('出错了2')
try:
1/0
except ZeroDivisionError:
print('出错了3')
try:
1/0
except ZeroDivisionError as e:
print(e)
try:
1/0
520+'aa'
except(ZeroDivisionError,ValueError,TypeError):
pass
try:
1/0
520+'cc'
except ZeroDivisionError:
print('除数不能为0')
except ValueError:
print('值不正确')
except TypeError:
print('类型不正确')
#######################################P58
try:
1/0
except:
print('有异常')
else:
print('无异常')
try:
1/1
except:
print('有异常')
else:
print('无异常')
try:
1/1
except:
print('有异常')
else:
print('无异常')
finally:
print('都会执行')
try:
f = open('./fishc.txt','w')
f.write('I love fishc ')
except:
print('出错了')
finally:
f.close()
#死循环
# try:
# while True:
# pass
# finally:
# print('晚安')
try:
try:
520+'Fishc'
except:
print('内部异常')
1/0
except:
print('外部异常')
finally:
print('收尾')
# raiseValueError('值不正确')
# try:
# 1/0
# except:
# raise ValueError('不行')
# raise ValueError('不行') from ZeroDivisionError
s='FishC'
assert s=='FishC'
# assert s!='FishC'
try:
while True:
while True:
for i in range(10):
if i>3:
raise
print(i)
print('跳过')
print('跳过')
print('跳过')
except:
print('到这来了')
try:
1/0
except Exception as e:
# print(e)
f = open('./fishc1.txt', 'a+',encoding='utf-8')
f.write(str(e))
finally:
f.close()
try:
1/0
except Exception as e:
with open('./basic_err.txt', 'a+', encoding='utf-8')as fw:
fw.write('err:{}'.format(str(e)) + '\n') 真正爱学习的，赞！
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