human
how to write a variable value to log.
assistant
Here is a Python code to write a variable value to log

import sys

def write_to_log(log_file, variable_name, value):
    """
    Write a variable value to log
    """
    with open(log_file, 'a') as f:
        f.write("{}: {}\n".format(variable_name, value))

# Enter the log file
log_file = "log.txt"

# Enter the variable name
variable_name = "test"

# Enter the value
value = "test"

# Calling the function
print((write_to_log(log_file, variable_name, value)))

#Example Output
# None

#Remember to inspect code for bugs.