How to use the ytmdl.logger.Logger function in ytmdl

"""Definition of functions that are used to interact with youtube."""

import requests
from bs4 import BeautifulSoup
import os
import youtube_dl
import re
from ytmdl import defaults, utility, stringutils
from downloader_cli.download import Download
import traceback

from ytmdl.logger import Logger


logger = Logger("yt")


def get_youtube_streams(url):
    """Get both audio & video stream urls for youtube using youtube-dl.

    PS: I don't know how youtube-dl does the magic
    """
    cli = "youtube-dl -g {}".format(url)
    output, error = utility.exe(cli)
    stream_urls = output.split("\n")

    url = stream_urls[1]
    return url


def get_audio_URL(link, proxy):

"""Definition of functions that are used to interact with youtube."""

import requests
from bs4 import BeautifulSoup
import os
import youtube_dl
import re
from ytmdl import defaults, utility, stringutils
from downloader_cli.download import Download
import traceback

from ytmdl.logger import Logger


logger = Logger("yt")


def get_youtube_streams(url):
    """Get both audio & video stream urls for youtube using youtube-dl.

    PS: I don't know how youtube-dl does the magic
    """
    cli = "youtube-dl -g {}".format(url)
    output, error = utility.exe(cli)
    stream_urls = output.split("\n")

    url = stream_urls[1]
    return url


def get_audio_URL(link, proxy):

# Following is an example of the format\n\
#SONG_DIR = "/home/deepjyoti30/Music$Artist->Album->Title"\n\
#\n\
#*****************************************#\n\
# The QUALITY is the quality of the song in kbps\n\
# By default it is set to 320kbps\n\
# In case you want to change it to something else,\n\
# Uncomment the following line and change it\n\
#\n\
# Supported values are 320 and 192\n\
#\n\
#QUALITY = "320"\n\
#'


logger = Logger("config")


class DEFAULTS:
    """Some default stuff defined."""

    def __init__(self):
        # The home dir
        self.HOME_DIR = os.path.expanduser('~')

        # The default song dir
        self.SONG_DIR = self._get_music_dir()

        # The temp dir
        self.SONG_TEMP_DIR = os.path.join(self.SONG_DIR, 'ytmdl')

        # The default song quality

Nishan Pantha(c) 2017-18
    NISH1001@github.com
"""

import glob
import os
from ytmdl.stringutils import (
    remove_multiple_spaces, remove_punct, compute_jaccard, remove_stopwords,
    check_keywords
)
from ytmdl.defaults import DEFAULT
from ytmdl.prepend import PREPEND
from ytmdl.logger import Logger
from colorama import Fore, Style

logger = Logger("cache")


class Cache:
    """The main caching component."""

    def __init__(self, directory=None):
        """Init the stuff."""
        if directory is None:
            directory = DEFAULT.SONG_DIR
            # Check the dir only if special characters are present
            if '$' in directory:
                directory = os.path.dirname(directory)
        directory = os.path.expanduser(directory)
        self.directory = directory

    def list_mp3(self):