radio_presets_mp

Python 3: Radio Presets MP (Wrapper): mplayer wrapper, csv.reader(), subprocess.run(), fileObject

mplayer is a dependency which needs to found on PATH. It is the media player installed in the OS; the secret sauce of the radio streams.

CLI

$ python3 radio_presets_mp.py

Press q to quit stream.

CSV Reader

from csv import reader

csv_read = reader(file_obj, delimiter=',')

>>> file_obj.name
'stations_urls.csv'
>>> file_obj.mode
'r'
>>> file_obj.encoding
'UTF-8'

>>> csv_read
<_csv.reader object at 0x7f5ace717278>
>>> csv_read.line_num
36

csv.reader() reads/parses tabular data in stations_urls.csv, and receives file_obj as the first argument which stores a TextIOWrapper with UTF-8 encoding, followed by a delimiter parameter which indicates that the comma will be the field separator in the CSV database.

The value 36 stored in csv_read.line_num indicates that csv_reader() will read 36 lines, not counting the first header line.

Subprocess Run

from subprocess import run

run(["mplayer", urls[station_num]])

subprocess.run() receives a list of parameters which become command line arguments passed to the Unix shell. In this case, mplayer, followed by a Internet radio station URL.

Dictionary

urls = {}

for rec in csv_read:
    print(f'{c:>2}: {rec[0]}')
    urls[c] = rec[1]

The looping structure will insert numerical keys and URL values into the urls dictionary: urls[c] = rec[1]. The number will be generated by an incremental counter: urls[c]. The value will come from the second field of a CSV record: rec[1].

>>> import pprint
>>> pprint.pprint(urls)
{1: 'http://ice2.somafm.com/defcon-128-aac',
 2: 'http://ice1.somafm.com/dronezone-256-mp3',
 3: 'https://somafm.com/deepspaceone130.pls',
 4: 'http://somafm.com/sf1033130.pls',
 5: 'https://somafm.com/missioncontrol130.pls',
 6: 'http://ice3.somafm.com/spacestation-128-mp3',
 7: 'http://somafm.com/specials130.pls',
 8: 'http://176.31.123.212:8192/index.html',
 9: 'http://streams.echoesofbluemars.org:8000/bluemars',
 10: 'http://streams.echoesofbluemars.org:8000/cryosleep',
 11: 'http://s3.viastreaming.net:8835/',
 12: 'http://air.verdure.net:8881/stream',
 13: 'http://ice1.somafm.com/groovesalad-256-mp3',
 14: 'https://somafm.com/gsclassic130.pls',
 15: 'http://systrum.net:8000/Systrum-Channel1.m3u',
 16: 'http://136.243.156.30:1701/stream/2/',
 17: 'http://149.56.234.138:8169/stream',
 18: 'http://7rays.stream.laut.fm/7rays',
 19: 'http://air.radiorecord.ru:8102/chil_320',
 20: 'http://station.waveradio.org/provodach',
 21: 'http://5.189.142.165:2304/stream',
 22: 'http://tachyon.shoutca.st:8919/stream',
 23: 'http://79.111.119.111:8002/droneambient',
 24: 'http://philae.shoutca.st:9019/stream',
 25: 'http://uk1.internet-radio.com:8004/stream',
 26: 'http://198.24.145.146:9318/stream',
 27: 'http://mixlive.ie:9332/;ambient',
 28: 'http://i.20hz.biz:8000/maschinengeist.org.192.mp3',
 29: 'http://aska.ru-hoster.com:8053/autodj',
 30: 'http://46.105.124.120:8604/stream',
 31: 'http://radio.hbr1.com:19800/ambient.ogg',
 32: 'http://108.61.154.147:5940',
 33: 'http://ubuntu.hbr1.com:19800/ambient.ogg',
 34: 'http://radio.stereoscenic.com/asp-s',
 35: 'http://radio.stereoscenic.com/asp-h',
 36: 'http://radio.stereoscenic.com/mod-h'}

Print Header

print(f'{file_obj.readline()}')

The readline() method call prints one line at a time. So, if the same call repeats, the built-in __next__ method could print each successive line—one by one. In this case, it is only used to print the first line, which is typically a header line: ========== Station List [Radio Presets MP] ==========

Initialize Counter

c = 1

This counter initializes with the number 1 because it is used to number the YouTube URLs, which will allow a user to select a numbered Internet radio station.

c += 1

The counter is incremented by 1.

Pick Radio Station Number

station_num = int(input('\x1b[1;36mEnter station number\x1b[0m: '))

After the radio station list prints, the last line (cyan in color) is where a user inputs their selection number, which is stored in the station_num variable:

Enter station number: 5

See Subprocess Run section above.