
    Create a function that validates whether student-submitted variable names follow proper snake_case convention in their programming assignments. The function should return true only if the variable name consists entirely of lowercase letters connected by underscores, and false for any other naming pattern. This validation is essential for enforcing consistent coding standards across student submissions and automatically assessing adherence to course requirements.
    

    
import re

def text_lowercase_underscore(text):
    """
    Create a function that validates whether student-submitted variable names follow proper snake_case convention in their programming assignments. The function should return true only if the variable name consists entirely of lowercase letters connected by underscores, and false for any other naming pattern. This validation is essential for enforcing consistent coding standards across student submissions and automatically assessing adherence to course requirements.
    

    """
import re

def text_lowercase_underscore(text):
    """
    Create a function that validates whether student-submitted variable names follow proper snake_case convention in their programming assignments. The function should return true only if the variable name consists entirely of lowercase letters connected by underscores, and false for any other naming pattern. This validation is essential for enforcing consistent coding standards across student submissions and automatically assessing adherence to course requirements.
    

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