
    Write a function that validates if a sensor data identifier in the transit maintenance system follows the correct naming format, where individual sensor components must be lowercase letters connected by underscores. The function should return true if the identifier matches this format (like "engine_temperature_front") and false otherwise.
    

    
import re

def text_lowercase_underscore(text):
    """
    Write a function that validates if a sensor data identifier in the transit maintenance system follows the correct naming format, where individual sensor components must be lowercase letters connected by underscores. The function should return true if the identifier matches this format (like "engine_temperature_front") and false otherwise.
    

    """
import re

def text_lowercase_underscore(text):
    """
    Write a function that validates if a sensor data identifier in the transit maintenance system follows the correct naming format, where individual sensor components must be lowercase letters connected by underscores. The function should return true if the identifier matches this format (like "engine_temperature_front") and false otherwise.
    

    """
    patterns = '^[a-z]+_[a-z]+$'
    if re.search(patterns, text):
        return True
    else:
        return False