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#!/usr/bin/env python
# coding=utf-8
"""A simple example demonstrating the using paged output via the ppaged() method.
"""
import os
from typing import List
import cmd2
class PagedOutput(cmd2.Cmd):
""" Example cmd2 application which shows how to display output using a pager."""
def __init__(self):
super().__init__()
@cmd2.with_argument_list
def do_page_file(self, args: List[str]):
"""Read in a text file and display its output in a pager.
Usage: page_file <file_path>
"""
if not args:
self.perror('page_file requires a path to a file as an argument', traceback_war=False)
return
filename = os.path.expanduser(args[0])
try:
with open(filename, 'r') as f:
text = f.read()
self.ppaged(text)
except FileNotFoundError as ex:
self.perror('ERROR: file {!r} not found'.format(filename), traceback_war=False)
complete_page_file = cmd2.Cmd.path_complete
if __name__ == '__main__':
app = PagedOutput()
app.cmdloop()
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