function filling a full line with = sign according to the output screen without specifying width using shutil

# import shutil to get the terminal width
import shutil

# define a function to fill the line
def fill_line():
    
    # get the width of current terminal
    width = shutil.get_terminal_size().columns
    
    # fill the line with =
    print('=' * width)
    
# test the function in a new cell
fill_line()