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#!/usr/bin/env python
# coding=utf-8
"""
A simple example demonstrating the various ways to call cmd2.Cmd.read_input() for input history and tab completion
"""
from typing import (
List,
)
import cmd2
EXAMPLE_COMMANDS = "Example Commands"
class ReadInputApp(cmd2.Cmd):
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
self.prompt = "\n" + self.prompt
self.custom_history = ['history 1', 'history 2']
@cmd2.with_category(EXAMPLE_COMMANDS)
def do_basic(self, _) -> None:
"""Call read_input with no history or tab completion"""
self.poutput("Tab completion and up-arrow history is off")
try:
self.read_input("> ")
except EOFError:
pass
@cmd2.with_category(EXAMPLE_COMMANDS)
def do_basic_with_history(self, _) -> None:
"""Call read_input with custom history and no tab completion"""
self.poutput("Tab completion is off but using custom history")
try:
input_str = self.read_input("> ", history=self.custom_history)
except EOFError:
pass
else:
self.custom_history.append(input_str)
@cmd2.with_category(EXAMPLE_COMMANDS)
def do_commands(self, _) -> None:
"""Call read_input the same way cmd2 prompt does to read commands"""
self.poutput("Tab completing and up-arrow history configured for commands")
try:
self.read_input("> ", completion_mode=cmd2.CompletionMode.COMMANDS)
except EOFError:
pass
@cmd2.with_category(EXAMPLE_COMMANDS)
def do_custom_choices(self, _) -> None:
"""Call read_input to use custom history and choices"""
self.poutput("Tab completing with static choices list and using custom history")
try:
input_str = self.read_input(
"> ",
history=self.custom_history,
completion_mode=cmd2.CompletionMode.CUSTOM,
choices=['choice_1', 'choice_2', 'choice_3'],
)
except EOFError:
pass
else:
self.custom_history.append(input_str)
# noinspection PyMethodMayBeStatic
def choices_provider(self) -> List[str]:
"""Example choices provider function"""
return ["from_provider_1", "from_provider_2", "from_provider_3"]
@cmd2.with_category(EXAMPLE_COMMANDS)
def do_custom_choices_provider(self, _) -> None:
"""Call read_input to use custom history and choices provider function"""
self.poutput("Tab completing with choices from provider function and using custom history")
try:
input_str = self.read_input(
"> ",
history=self.custom_history,
completion_mode=cmd2.CompletionMode.CUSTOM,
choices_provider=ReadInputApp.choices_provider,
)
except EOFError:
pass
else:
self.custom_history.append(input_str)
@cmd2.with_category(EXAMPLE_COMMANDS)
def do_custom_completer(self, _) -> None:
"""Call read_input to use custom history and completer function"""
self.poutput("Tab completing paths and using custom history")
try:
input_str = self.read_input(
"> ", history=self.custom_history, completion_mode=cmd2.CompletionMode.CUSTOM, completer=cmd2.Cmd.path_complete
)
self.custom_history.append(input_str)
except EOFError:
pass
@cmd2.with_category(EXAMPLE_COMMANDS)
def do_custom_parser(self, _) -> None:
"""Call read_input to use a custom history and an argument parser"""
parser = cmd2.Cmd2ArgumentParser(prog='', description="An example parser")
parser.add_argument('-o', '--option', help="an optional arg")
parser.add_argument('arg_1', help="a choice for this arg", metavar='arg_1', choices=['my_choice', 'your_choice'])
parser.add_argument('arg_2', help="path of something", completer=cmd2.Cmd.path_complete)
self.poutput("Tab completing with argument parser and using custom history")
self.poutput(parser.format_usage())
try:
input_str = self.read_input(
"> ", history=self.custom_history, completion_mode=cmd2.CompletionMode.CUSTOM, parser=parser
)
except EOFError:
pass
else:
self.custom_history.append(input_str)
if __name__ == '__main__':
import sys
app = ReadInputApp()
sys.exit(app.cmdloop())
|
