Python one-filer password input with obscured character echoing for input visual feedback, avoids needing any external dependencies

password_input_with_asterisks.py

import sys
import termios
import atexit

def password_input(prompt="Enter password: "):
  fd = sys.stdin.fileno()
  iflag, oflag, cflag, lflag, ispeed, ospeed, cc = termios.tcgetattr(fd)
  def _restore_tty():
    termios.tcsetattr(fd, termios.TCSANOW, [iflag,oflag,cflag,lflag|termios.ECHO|termios.ICANON,ispeed,ospeed,cc])
  atexit.register(_restore_tty)      # restore tty on unexpected exit
  lflag = lflag & ~(termios.ECHO |   # disable echoing user input to tty
                    termios.ICANON ) # disable canonical mode (make character input immediate)
  termios.tcsetattr(fd, termios.TCSANOW, [iflag, oflag, cflag, lflag, ispeed, ospeed, cc] )
  password, echo_str = "", ""
  while True:
    print(f"\r\033[2K{prompt}{echo_str}", end='', file=sys.stderr)
    char = sys.stdin.read(1)
    if char == '\n':            # newline/return key to finalize input
      break
    elif char == '\x1b':        # exit key to cancel
      raise KeyboardInterrupt
    elif char == '\x7f':        # backspace to delete backwards
      echo_str = echo_str[:-1]
      password = password[:-1]
    elif char.isascii():        # append all other ASCII characters as password string characters
      echo_str += '*'
      password += char
    else: continue              # ignore any other unexpected inputs
  _restore_tty()
  atexit.unregister(_restore_tty)
  print("\r\033[2K", end='', file=sys.stderr)
  return password

Demo