#!/usr/bin/env pyton
# _*_ coding: gbk _*_
from sys import argv, exit, stdout, stdin
from os import path, isatty
from getopt import getopt, GetoptError
help_info = ["more.py [-h] file list...",
"\t-h\t显示帮助信息"]
class _Getch:
"""Gets a single character from standard input. Does not echo to the screen."""
def __init__(self):
try:
self.impl = _GetchWindows()
except ImportError, err:
self.impl = _GetchUnix()
def __call__(self): return self.impl()
class _GetchUnix:
def __init__(self):
import tty, sys
def __call__(self):
import sys, tty, termios
fd = sys.stdin.fileno()
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(sys.stdin.fileno())
ch = sys.stdin.read(1)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
return ch
class _GetchWindows:
def __init__(self):
import msvcrt
def __call__(self):
import msvcrt
return msvcrt.getch()
getch = _Getch()
def usage():
for l in help_info:
print l
def do_more(lines):
num_of_lines = 0
i = 0
while i < len(lines):
num_of_lines = num_of_lines + 1
stdout.write(lines[i])
i += 1
if num_of_lines >= 12:
num_of_lines = see_more(num_of_lines)
if num_of_lines < 0:
i += num_of_lines
if i < 0:
i = 0
def see_more(num_of_lines):
answer = getch()
if answer== " ":
return 0
elif answer == "\r":
return (num_of_lines - 1)
elif answer == "q":
exit(1)
elif answer == "b":
return (-num_of_lines)
else:
return 0
if __name__ == "__main__":
try:
opts, args = getopt(argv[1:], "h")
except GetoptError, err:
print str(err)
usage()
exit(2)
for o, a in opts:
if o == "-h":
usage()
exit(0)
else:
print "Unkown options"
usage()
exit(2)
if len(args) == 0:
usage()
#www.iplaypy.com
else:
for file in args:
if not path.exists(file):
print file + ": No such file or directory"
else:
print file + ":"
fp = open(file, 'r')
lines = fp.readlines()
do_more(lines)