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hpr2344 :: Follow on to HPR2340 (Tracking the HPR queue in Python)

Improved version of script to capture the number of HPR shows in the queue using python.

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Hosted by MrX on 2017-07-27 is flagged as Explicit and is released under a CC-BY-SA license.
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Part of the series: Programming 101

A series focusing on concepts and the basics of programming

This is a follow up to my previous show HPR2340, the improvement being I use the available STATS file from the hpr website rather than scraping the content from the HPR calendar page

Snapshot contents (2017-06-23) of 'stats.txt' file which was actually called 'hpr_stats.txt' my mistake

Started:    11 years, 8 months, 19 days ago (2005-10-10)
Renamed HPR:    9 years, 5 months, 27 days ago (2007-12-31)
Total Shows:    2911
Total TWAT: 300
Total HPR:  2611
HPR Hosts:  286
Days to next free slot: 17
Hosts in Queue: 9
Shows in Queue: 14
Comments waiting approval:  0
Files on the FTP Server:    1
Number of Emergency Shows:  7
Days until show without media:  0
1498246151,369343750,299186950,2911,300,2611,286,17,9,14,0,1,7,0
#!/usr/bin/env python3

### This is a scratchpad file I've created to try out snippets of code in python

# The script below is for use with Python 3
# This script should work out of the box on most systems running a version of Python 3 
# If you happen to have a blinkstick lying about then your can uncomment the blinkstick module
# and uncomment the references at the bottom of the program that call the blinkstick functions
# Regrds, Mr X


# Imported modules
from time import sleep          # used to pause program
#from blinkstick import blinkstick  # used to control blinkstick nano attached to usb port of raspberry pi
import urllib.request           # used to capture hpr webpage content to get the number of HPR shows in the que
import re               # regular expressions, used to find sting in HPR webpage (get_hpr_que)


# These functions control a blink stick nano attached to my raspberry pi USB port #################
# They can be ignored or deleted if you don't have one


def bstick_off():
# Search for all attached blinksticks and turn them all off
    for bstick in blinkstick.find_all():
        bstick.turn_off()   # Turn front blinkstick LED off
        bstick.set_color(channel=0, index=1, name="black")  # Turn rear blinkstick led off
        print("Blinkstick: " + bstick.get_serial() + " turned off")


def bstick_on(colour):
# Turn blinkstick on and set led colour to string value stored in var colour
# valid colours are, black, silver, gray, white, maroon, red, purple, fuchsia, green, lime, olive, yellow, navy, blue, teal, aqua
    for bstick in blinkstick.find_all():
        bstick.set_max_rgb_value(30)        # Sets max blinkstick RGB value to 15, makes LED dimm
        bstick.set_color(name=colour)       # Turn blinkstick on, var colour determines colour
        print ("Blinkstick: " + bstick.get_serial() + " | Colour: " + bstick.get_color(color_format="hex") + " [" + colour + "]")
#hex

def bstick_on_random():
# Turn blinkstick on colour random
    for bstick in blinkstick.find_all():
        bstick.set_random_color()
        print ("Blinkstick: " + bstick.get_serial() + " | Colour: " + bstick.get_color(color_format="hex"))


def bstick_blink_red():
# Flash blinkstick colour red
    for bstick in blinkstick.find_all():
        bstick.blink(name="red")
        print ("Blinkstick: " + bstick.get_serial() + " | Colour: " + bstick.get_color(color_format="hex"))

################################################################################


def get_hpr_que_improved():
# Goto hacker public stats page and extract the number of days to next free slot
# turns on blinkstick LED with colour dependent on the number of days to next free slot in HPR queue

    url = 'http://hackerpublicradio.org/stats.php'  # HPR url for stats page
    try:
        text = urllib.request.urlopen(url).read()   # Try to read hpr stats text
    except:
        print("ERROR: Problem acessing url " + url)     # if error accessing url then return -1
        hpr_shows = -1
        return hpr_shows
    #print(text)    # DEBUG
    text_page = str(text)   # convert text from list to string
    line_begin = text_page.find('Days to next free slot:') # find position of string in page
    line_end = line_begin + 27 # Store line end position (start position + 27)
    line = text_page[line_begin:line_end]  # Capture string line
    #print(line) # DEBUG Print line string
    digit = re.findall(r'\d+',line)         # Find digits in line
    #print(digit[0])    # DEBUG print the 1st digit
    try:
        hpr_shows = int(digit[0])   # convert digit list to integer days
    except:                         # If show numbers not found then return -1
        print("ERROR: Problem getting number of HPR shows in que.")
        hpr_shows = -1
        return hpr_shows

    if hpr_shows > 9:       # If hpr show que > 9 turn on green LED
        print("Turn on green blinkstick LED")
        #bstick_on("green")
    elif hpr_shows > 5:     # Else if hpr show que > 5 turn on blue LED
        print("Turn on blue blinkstick LED")
        #bstick_on("blue")
    elif hpr_shows > -1:    # Else if hpr show que > -1 turn on ref LED
        print("Turn on red blinkstick LED")     
        #bstick_on("red")
    else:
        print("Flash red blinkstick LED")
        #bstick_blink_red() # Else blink LED to show error
    print("The are " + str(hpr_shows) + " days to tne next free slot in the HPR que...")
    sleep(4)
    print("Turn off all blinkstick LED's")
    #bstick_off()           # Turn blinkstick off


# Main program
get_hpr_que_improved()

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