import numpy as np
import matplotlib.pyplot as plt

def main(numbers_files, multiplier):
    """
    Example Python application that reads the given numbers_files and multiplies
    the content (numbers) by the supplied multiplier
    Arguments:
        numbers_files: list of paths to input files of type 'text_data'
        multiplier: number by which the arrays of numbers are multiplied
    Returns:
        A file named 'multiplied_numbers_plot.png' containing a plot of multiplied 
        numbers.
    """

    plt.figure()
    for numbers_file in numbers_files:
        numbers = np.genfromtxt(numbers_file, comments="#", delimiter=",", unpack=False)
        numbers = numbers[~np.isnan(numbers)]
        numbers = np.array(numbers).flatten()
        multiplied_numbers = numbers * multiplier
        plt.plot(multiplied_numbers)
    plt.savefig('multiplied_numbers_plot.png')