[Python] How to enter a password on the console

1. raw_input ():

PWD = Raw_input ( ' Password: ' )
Print PWD
# Password: AAA
# Aaa

Note: The simplest but Insecure Method

 

2. getpass. getpass ():

Import Getpass
PWD = Getpass. getpass ( ' Password: ' )
Print PWD
# Password:
# Aaaa

Note:It's safe, but you can't see the number of digits in the input. You may feel a little unaccustomed ..

 

3. msvcrt. getch (): 

Code Import Msvcrt, sys

Def Pwd_input ():
Chars = []
While True:
Newchar = Msvcrt. getch ()
If Newchar In   ' \ R \ n ' : # If it is a line feed, the input ends.
Print   ''
Break
Elif Newchar =   ' \ B ' : # If it is a return, the last digit is deleted.
If Chars:
Del Chars [ - 1 ]
SYS. stdout. Write ( ' \ B ' ) # Delete an asterisk, but do not know why it cannot be executed...
Else :
Chars. append (newchar)
SYS. stdout. Write ( ' * ' )#Displayed as asterisks
Print   '' . Join (chars)

PWD=Pwd_input ()
PrintPWD

#******
#Aaaaaa

Note:Solved the problem that the second method cannot display the number of input digits. However, if you press the backspace key, although the actual difference is,

However, the console does not display the corresponding backspace. For example, if the current input is "ABCD", it is displayed as "*****", and now a backspace key is entered.

The input value is ABC, but it is still :****. I don't know whySYS. stdout. Write ('\ B'This line is not executed. It is estimated that it is used and

Msvcrt. getch () is related. If someone knows why, please reply, 3q ~