def perror(msg: Any, *, end: str = '\n', apply_style: bool = True) -> None:
"""Override perror() method from `cmd2.Cmd`
Use colorama native approach for styling the text instead of `cmd2.ansi` methods
:param msg: message to print (anything convertible to a str with '{}'.format() is OK)
:param end: string appended after the end of the message, default a newline
:param apply_style: If True, then ansi.style_error will be applied to the message text. Set to False in cases
where the message text already has the desired style. Defaults to True.
"""
if apply_style:
final_msg = "{}{}{}{}".format(Fore.RED, Back.YELLOW, msg, Style.RESET_ALL)
else:
final_msg = "{}".format(msg)
ansi.ansi_aware_write(sys.stderr, final_msg + end)
import sys
from cmd2 import ansi, style
if len(sys.argv) > 1:
directory = sys.argv[1]
print('Using specified directory: {!r}'.format(directory))
else:
directory = 'foobar'
print('Using default directory: {!r}'.format(directory))
# Keep track of where we started - NOTE: cwd was added to self.py_locals dictionary so we can access it
original_dir = cwd()
# Try to change to the specified directory
cd_result = app('cd {}'.format(directory))
# Conditionally do something based on the results of the last command
if cd_result:
print('\nContents of directory {!r}:'.format(directory))
dir_result = app('dir -l')
print('{}\n'.format(dir_result.data))
# Change back to where we were
print('Changing back to original directory: {!r}'.format(original_dir))
app('cd {}'.format(original_dir))
else:
# cd command failed, print a warning
print('Failed to change directory to {!r}'.format(directory))
ansi.ansi_aware_write(sys.stderr, style(cd_result.stderr, fg='red'))