Sven Sager
3cc64f514f
The new `grep` function reads a specified file and returns lines containing a given pattern. It handles file not found errors and logs unexpected exceptions, improving resilience in file operations.
79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
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# SPDX-FileCopyrightText: 2025 KUNBUS GmbH
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# SPDX-License-Identifier: GPL-2.0-or-later
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"""Helper for dbus."""
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from logging import getLogger
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log = getLogger(__name__)
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REVPI_DBUS_NAME = "com.revolutionpi.middleware1"
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REVPI_DBUS_BASE_PATH = "/com/revolutionpi/middleware1"
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class DbusInterface:
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def cleanup(self):
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"""
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Represents a method responsible for performing cleanup operations. This method is executed to properly
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release resources, close connections, or perform other necessary finalization tasks.
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This method does not take any arguments or return a value.
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"""
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pass
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def extend_interface(*args) -> str:
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"""
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Extends an interface name by appending additional segments to a pre-defined base name.
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This function takes multiple arguments, concatenates them with a predefined base
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interface name, and returns the resulting string, effectively constructing an
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extended interface name.
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Args:
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*args: str
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Components to be appended to the base interface name.
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Returns:
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str
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Fully constructed interface name by joining the base interface name with
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the provided segments.
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"""
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return ".".join([REVPI_DBUS_NAME, *args])
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def grep(pattern, filename):
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"""
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Searches for lines in a file that contain a given pattern and returns them as a list.
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The function reads lines from the specified file and checks whether each line
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contains the provided pattern. It returns a list of lines that match the
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pattern. If the file is not found, an empty list is returned. Any other
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exceptions during the file reading process are caught and logged.
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Args:
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pattern (str): The substring to search for within the file's lines.
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filename (str): The path to the file that will be searched.
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Returns:
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list[str]: A list containing lines that include the provided pattern, with
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leading and trailing spaces removed.
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Raises:
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FileNotFoundError: This error is caught if the file specified is not
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found.
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Exception: Any unforeseen exception during file operations is caught and
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logged.
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"""
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try:
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with open(filename, "r") as file:
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# Gibt alle Zeilen zurück, die das Muster enthalten
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matching_lines = [line.strip() for line in file if pattern in line]
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return matching_lines
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except FileNotFoundError:
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return []
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except Exception as e:
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log.error(f"Error reading file: {e}")
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return []
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