Usage: $ python3 lastfm_cli.py username

lastfm.py

import requests
from requests import Session
import json
from pprint import pprint
import os
import sys


class Lastfm:
    url = 'http://ws.audioscrobbler.com/2.0/'
    s = Session()

    def __init__(self, token=None):
        self.token = token

    def recent_tracks(self, user_name=None):
        recent = self.s.get(self.url
                            + "?method=user.getrecenttracks&user={USER_NAME}&api_key={API_KEY}&format=json&limit=1"
                            .format(USER_NAME=user_name, API_KEY=self.token))
        if recent.status_code == 200:
            recent_json = recent.json()
            if 'error' in recent.json():
                raise LastfmError(
                    code=recent_json['error'], message=recent_json['message'])
            else:
                return recent.json()
        else:
            raise LastfmError(message=recent.text)


class LastfmError(Exception):
    """Exception raised for errors in the request.

    Lastfm erros code according https://www.last.fm/api/errorcodes:

        1 : This error does not exist
        2 : Invalid service -This service does not exist
        3 : Invalid Method - No method with that name in this package
        4 : Authentication Failed - You do not have permissions to access the service
        5 : Invalid format - This service doesn't exist in that format
        6 : Invalid parameters - Your request is missing a required parameter
        7 : Invalid resource specified
        8 : Operation failed - Most likely the backend service failed. Please try again.
        9 : Invalid session key - Please re-authenticate
        10 : Invalid API key - You must be granted a valid key by last.fm
        11 : Service Offline - This service is temporarily offline. Try again later.
        12 : Subscribers Only - This station is only available to paid last.fm subscribers
        13 : Invalid method signature supplied
        14 : Unauthorized Token - This token has not been authorized
        15 : This item is not available for streaming.
        16 : The service is temporarily unavailable, please try again.
        17 : Login: User requires to be logged in
        18 : Trial Expired - This user has no free radio plays left. Subscription required.
        19 : This error does not exist
        20 : Not Enough Content - There is not enough content to play this station
        21 : Not Enough Members - This group does not have enough members for radio
        22 : Not Enough Fans - This artist does not have enough fans for for radio
        23 : Not Enough Neighbours - There are not enough neighbours for radio
        24 : No Peak Radio - This user is not allowed to listen to radio during peak usage
        25 : Radio Not Found - Radio station not found
        26 : API Key Suspended - This application is not allowed to make requests to the web services
        27 : Deprecated - This type of request is no longer supported
        29 : Rate Limit Exceded - Your IP has made too many requests in a short period, exceeding our API guidelines
    """

    def __init__(self, message, code=-1):
        self.code = code
        self.message = message

lastfm_cli.py

#!/usr/bin/env python3
from lastfm import Lastfm, LastfmError
import os
import sys

def main(user_name):
    
    template = """
Last played 

Name   : {NAME}
Artist : {ARTIST}
Album  : {ALBUM}

Now playing? {NOW_PLAYING}"""
    
    
    l = Lastfm(token=os.getenv('LASTFM_TOKEN'))
    try:
        recent = l.recent_tracks(user_name)
    except LastfmError as e:
        print(e.message)
        raise

    last_track = recent['recenttracks']['track'][0]
    #print(recent['recenttracks']['@attr']['total'])
    
    print(template.format(
        NAME=last_track['name'],
        ARTIST=last_track['artist']['#text'],
        ALBUM=last_track['album']['#text'],
        NOW_PLAYING= 'YEEEEEEES!!!!' if '@attr' in last_track else "NOP, played at {DATE}".format(DATE=last_track['date']['#text'])
        ))
    

if __name__ == '__main__':
    main(sys.argv[1])