1.讀取乙個檔案，顯示除了井號（#）開頭的行意外的所有行
# -*- coding: utf-8 -*-
"""created on tue may 28 09:37:08 2019
@author: omega_sendoh
"""#開啟檔案
f = open("install-sh","r")
#讀取檔案的所有行，以列表形式儲存，每行為列表中的乙個字串元素
res = f.readlines()
#迴圈整個列表，去除以空格開頭的行的空格，然後去除以#號開頭的行的#號
for i in res:
if i[0] == "#":
continue
else:
print(i)
# -*- coding: utf-8 -*-
"""created on tue may 28 10:57:55 2019
@author: omega_sendoh
""""""
定義乙個空的字串，從起始位置開始搜尋輸入的字串，如果字元沒有出現在wind中，則把字元加入wind
如果字元出現在wind中，則找到字串**現該相同字元的位置，刪除該重複字元之前的所有字元
並重新加入該字元
"""
def longeststring(s):
wind = ''
l=0for i in s:
if i not in wind:
wind +=i
l=max(l,len(wind))
else:
wind = wind[wind.index(i)+1:] + i
return l
s=input('enter string:')
print(longeststring(s))
import json
def add_info():
#開啟儲存檔案，判斷檔案中是否有內容
with open('usr.json','a+') as f:
info = f.read()
#如果沒有內容，建立乙個字典，以字典的方式儲存**與密碼
if not info:
with open('usr.json','a+') as f:
full_info = {}
net_add = input('enter your url:')
passwd = input('enter your password:')
full_info[net_add] = passwd
print('add success')
json.dump(full_info,f)
#若檔案中有內容，則把檔案中的內容轉換為python的字典型別
else:
with open('usr.json','r') as f :
full_info = json.load(f)
#print((full_info))
net_add = input('enter your url:')
passwd = input('enter your password:')
full_info.setdefault(net_add,passwd)
print('add success')
#給字典中新增物件，再次寫入檔案中（即新增新的資訊後重新更新檔案的內容）
with open('usr.json','w') as f :
json.dump(full_info,f)
def del_info():
with open('usr.json','r') as f:
full_info = json.load(f)
#輸入想要刪除的**
net_add = input('enter your delete url:')
#如果該**存在，則刪除**與密碼，把更改後的資料存到檔案中
if net_add in full_info:
del full_info[net_add]
print('delete success')
with open('usr.json','w') as f:
json.dump(full_info,f)
#若該**不存在，提示**不存在
else:
print('this url not exist')
def change_info():
with open('usr.json','r') as f:
full_info = json.load(f)
#輸入要更改的**與密碼
net_add = input('enter your change url:')
passwd = input('enter your new password:')
if net_add in full_info:
full_info[net_add] = passwd
print('change password succcess')
with open('usr.json','w') as f:
json.dump(full_info,f)
else:
print('this url not exist')
def check_info():
with open('usr.json','r') as f:
full_info = json.load(f)
net_add = input('enter your check url:')
if net_add in full_info:
print('this url password is:',full_info[net_add])
else:
print('this url not exist')
print('you can choose: add/del/change/check/quit')
while 1:
obj = input('enter your choose:')
if obj == 'add':
add_info()
elif obj == 'del':
del_info()
elif obj == 'change':
change_info()
elif obj == 'check':
check_info()
else:
break
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