注：所有代碼部分均為連續(xù)的，“結(jié)果”為在jupyter分步運(yùn)行結(jié)果

代碼部分：

file = open('hahaha','r+')#先去讀一個(gè)文件，如果能打開(kāi)的話就可以寫(xiě)入

結(jié)果： （報(bào)錯(cuò)，因?yàn)楫?dāng)前目錄下沒(méi)有此文件，所以異常）

FileNotFoundError Traceback (most recent call last)
<ipython-input-1-91678176fb53> in <module>()
----> 1 file = open('hahaha','r+')#先去讀一個(gè)文件，如果能打開(kāi)的話就可以寫(xiě)入

FileNotFoundError: [Errno 2] No such file or directory: 'hahaha'

#處理異常方式
try:#嘗試執(zhí)行這個(gè)語(yǔ)句，如果出現(xiàn)異常則保存在Exception 里面
    file = open('hahaha','r+')
except Exception as e:
    print(e)

結(jié)果：
[Errno 2] No such file or directory: 'hahaha'

try:
    file = open('hahaha','r+')
except Exception as e:
    print(e)
    response = input('Do you want to create it:')
    if(response=='yes'):
        with open('hahaha','w') as f:
            pass
        print('The file was created successfully')
    else:
        pass

結(jié)果：
[Errno 2] No such file or directory: 'hahaha'
Do you want to create it:yes
The file was created successfully

try:
    file = open('hahaha','r+')
except Exception as e:
    print(e)
    response = input('Do you want to create it:')
    if(response=='yes'):
        with open('hahaha','w') as f:
            pass
        print('The file was created successfully')
    else:
        pass
else:#沒(méi)有錯(cuò)誤
    file.write('hahaha')
    file.close()