我们从Python开源项目中，提取了以下5个代码示例，用于说明如何使用termios.ECHONL。
def prepare_tty(): "set the terminal in char mode (return each keyboard press at once) and"\ " switch off echoing of this input; return the original settings" stdin_fd = sys.stdin.fileno() # will most likely be 0 ;-> old_stdin_config = termios.tcgetattr(stdin_fd) [ iflag, oflag, cflag, lflag, ispeed, ospeed, cc ] = \ termios.tcgetattr(stdin_fd) cc[termios.VTIME] = 1 cc[termios.VMIN] = 1 iflag = iflag & ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK | termios.ISTRIP | termios.INLCR | termios.IGNCR | #termios.ICRNL | termios.IXON) # oflag = oflag & ~termios.OPOST cflag = cflag | termios.CS8 lflag = lflag & ~(termios.ECHO | termios.ECHONL | termios.ICANON | # termios.ISIG | termios.IEXTEN) termios.tcsetattr(stdin_fd, termios.TCSANOW, [ iflag, oflag, cflag, lflag, ispeed, ospeed, cc ]) return (stdin_fd, old_stdin_config)
def _fix_tty(self): """Set suitable tty options """ assert self.tcattr is not None iflag, oflag, cflag, lflag, ispeed, ospeed, chars = self.tcattr # pylint:disable=unpacking-non-sequence # equivalent to cfmakeraw iflag &= ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK | termios.ISTRIP | termios.INLCR | termios.IGNCR | termios.ICRNL | termios.IXON) oflag &= ~termios.OPOST lflag &= ~(termios.ECHO | termios.ECHONL | termios.ICANON | termios.ISIG | termios.IEXTEN) cflag &= ~(termios.CSIZE | termios.PARENB) cflag |= termios.CS8 termios.tcsetattr(STDIN, termios.TCSANOW, [iflag, oflag, cflag, lflag, ispeed, ospeed, chars])
def read_single_keypress(msg): """Waits for a single keypress on stdin. This is a silly function to call if you need to do it a lot because it has to store stdin's current setup, setup stdin for reading single keystrokes then read the single keystroke then revert stdin back after reading the keystroke. Returns the character of the key that was pressed (zero on KeyboardInterrupt which can happen when a signal gets handled) """ import termios, fcntl, sys, os fd = sys.stdin.fileno() # save old state flags_save = fcntl.fcntl(fd, fcntl.F_GETFL) attrs_save = termios.tcgetattr(fd) # make raw - the way to do this comes from the termios(3) man page. attrs = list(attrs_save) # copy the stored version to update # iflag attrs[0] &= ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK | termios.ISTRIP | termios.INLCR | termios. IGNCR | termios.ICRNL | termios.IXON ) # oflag attrs[1] &= ~termios.OPOST # cflag attrs[2] &= ~(termios.CSIZE | termios. PARENB) attrs[2] |= termios.CS8 # lflag attrs[3] &= ~(termios.ECHONL | termios.ECHO | termios.ICANON | termios.ISIG | termios.IEXTEN) termios.tcsetattr(fd, termios.TCSANOW, attrs) # turn off non-blocking fcntl.fcntl(fd, fcntl.F_SETFL, flags_save & ~os.O_NONBLOCK) sys.stdout.write(msg) sys.stdout.flush() # read a single keystroke try: ret = sys.stdin.read(1) # returns a single character except KeyboardInterrupt: ret = 0 finally: # restore old state termios.tcsetattr(fd, termios.TCSAFLUSH, attrs_save) fcntl.fcntl(fd, fcntl.F_SETFL, flags_save) return ret
def get_instruction_key(self): """Waits for a single keypress on stdin. This is a silly function to call if you need to do it a lot because it has to store stdin's current setup, setup stdin for reading single keystrokes then read the single keystroke then revert stdin back after reading the keystroke. Returns the character of the key that was pressed (zero on KeyboardInterrupt which can happen when a signal gets handled) This method is licensed under cc by-sa 3.0 Thanks to mheyman http://stackoverflow.com/questions/983354/how-do-i-make-python-to-wait-for-a-pressed-key\ """ import termios, fcntl, sys, os fd = sys.stdin.fileno() # save old state flags_save = fcntl.fcntl(fd, fcntl.F_GETFL) attrs_save = termios.tcgetattr(fd) # make raw - the way to do this comes from the termios(3) man page. attrs = list(attrs_save) # copy the stored version to update # iflag attrs[0] &= ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK | termios.ISTRIP | termios.INLCR | termios. IGNCR | termios.ICRNL | termios.IXON ) # oflag attrs[1] &= ~termios.OPOST # cflag attrs[2] &= ~(termios.CSIZE | termios. PARENB) attrs[2] |= termios.CS8 # lflag attrs[3] &= ~(termios.ECHONL | termios.ECHO | termios.ICANON | termios.ISIG | termios.IEXTEN) termios.tcsetattr(fd, termios.TCSANOW, attrs) # turn off non-blocking fcntl.fcntl(fd, fcntl.F_SETFL, flags_save & ~os.O_NONBLOCK) # read a single keystroke try: ret = sys.stdin.read(1) # returns a single character except KeyboardInterrupt: ret = 0 finally: # restore old state termios.tcsetattr(fd, termios.TCSAFLUSH, attrs_save) fcntl.fcntl(fd, fcntl.F_SETFL, flags_save) return ret
def key_get() -> str: """ Waits for a single keypress on stdin. This is a silly function to call if you need to do it a lot because it has to store stdin's current setup, setup stdin for reading single keystrokes then read the single keystroke then revert stdin back after reading the keystroke. Returns the character of the key that was pressed (zero on KeyboardInterrupt which can happen when a signal gets handled) Reference (StackOverflow): /questions/983354/how-do-i-make-python-to-wait-for-a-pressed-key """ if "posix" == os.name: fd = sys.stdin.fileno() # save old state flags_save = fcntl.fcntl(fd, fcntl.F_GETFL) attrs_save = termios.tcgetattr(fd) # make raw - the way to do this comes from the termios(3) man page. attrs = list(attrs_save) # copy the stored version to update # iflag attrs[0] &= ~(termios.IGNBRK | termios.BRKINT | termios.PARMRK | termios.ISTRIP | termios.INLCR | termios. IGNCR | termios.ICRNL | termios.IXON) # oflag attrs[1] &= ~termios.OPOST # cflag attrs[2] &= ~(termios.CSIZE | termios. PARENB) attrs[2] |= termios.CS8 # lflag attrs[3] &= ~(termios.ECHONL | termios.ECHO | termios.ICANON | termios.ISIG | termios.IEXTEN) termios.tcsetattr(fd, termios.TCSANOW, attrs) # turn off non-blocking fcntl.fcntl(fd, fcntl.F_SETFL, flags_save & ~os.O_NONBLOCK) # read a single keystroke try: ret = sys.stdin.read(1) # returns a single character except KeyboardInterrupt: ret = str() finally: # restore old state termios.tcsetattr(fd, termios.TCSAFLUSH, attrs_save) fcntl.fcntl(fd, fcntl.F_SETFL, flags_save) return ret elif "nt" == os.name: try: # 'getch' by default returns a 'bytes' object; # so an extra conversion is required ret = msvcrt.getch().decode() except KeyboardInterrupt: ret = str() return ret # -------------------------------- FUNCTIONS ----------------------------------
