2020Python work nine - basic application functions

2020Python work nine - basic application functions

@2020.3.17

Use function overrides

 

# 1, written document editing, when you call the function, passing three parameters (modify the file path, to modify the contents of the revised content) modification to complete the file 

import os
def file(file_path, old_content, new_content):
    with open(r'{}'.format(file_path),mode='rb') as read_f,\
            Open (R & lt ' {} .swap ' .format (file_path, MODE = ' WB ' )) AS write_f:
          # .swap naming convention is Linux system, the beginning of the file is a hidden '.' 
        the while True:
            res = read_f.readline().decode('utf-8')
            if old_content in res:
                res2 = res.replace('{}'.format(old_content),'{}'.format(new_content))
                write_f.write(bytes('{}'.format(res2),encoding='utf-8'))
            else:
                write_f.write (bytes ( ' {} ' .format (RES), encoding = ' UTF-. 8 ' ))
             BREAK 
    The os.remove ( ' {} ' .format (file_path))   # delete the original file 
    os.rename ( ' { .swap} ' .format (file_path), ' {} ' .format (file_path)) # new file is renamed to the original file name 

file_path = INPUT ( ' Please INPUT file path: ' )
old_content = input('please input content that needs to rewrite:')
new_content = input('please input new content:')
if file_path and old_content and new_content:
    mesg = File (file_path, old_content, NEW_CONTENT)
     Print (mesg)
 the else :
     Print ( ' modification failure Please try again " )

 

# 2, written in tail tool

def tail():
    cmd = INPUT ( ' enter the command: ' ) .strip ()
     IF cmd == ' tail -f the access.log ' :
        with open(r'access.log', 'a+b') as f:
            f.write(bytes('{}\n'.format(cmd), encoding='utf-8'))
        continue  
    else:
        with open(r'access.log', 'rb') as f:
            f.write(bytes('{}\n'.format(cmd), encoding='utf-8'))
tail()

 

# 3, writing a login function

def login(inp_username,inp_password):
Open with ( ' user.txt ' , MODE = ' RT ' , encoding = ' UTF-. 8 ' ) AS F:
     for Line in F:      # authentication, the user name and password entered with the contents read out for comparison 
        Print ( Line, End = '' ) # Egon: 123 \ n- 
        username, password = line.strip () Split (. ' : ' )
         IF inp_username == username and inp_password == password:
             Print ( ' Login successfull ' )
             BREAK
    the else :
         Print ( ' account number or password is incorrect ' )

inp_username=input('your name>>: ').strip()
inp_password=input('your password>>: ').strip()
login(inp_username,inp_password)

 

# 4, written registration function

def register(name,pwd):
with open('register.txt',mode='at',encoding='utf-8') as f:
    f.write('{}:{}\n'.format(name,pwd))
    
name=input('your name>>: ')
pwd=input('your name>>: ')
register(name,pwd)