<human>:  3 read first line of file.
<bot>: Here is a Python function to read the first line of a file

import os

def read_first_line(filename):
  """
  Read first line of file.
  """
  with open(filename, 'r') as f:
    return f.readline()

# Enter the filename
filename = "C:\\Users\\carnation\\Desktop\\python_exercises\\file.txt"

# Calling the function
first_line = read_first_line(filename)

# Printing the first line
print(first_line)

#Example Output
# 

#Remember to inspect code for bugs.