[Bitcoin sparkline in the terminal]

btcspark.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# btcspark.py
#
# Shows the current value of Bitcoin in Euro, as given by bitcoinaverage.com,
# along with a sparkline of the last 24 hours.
#
# Requires 
from __future__ import print_function, unicode_literals
import requests, csv, StringIO, os

# TODO edit this line to point to the Spark script:
SPARK = './spark'
SPARK_LENGTH = 32
HISTORY_URL = 'https://api.bitcoinaverage.com/history/{0}/per_minute_24h_global_average_sliding_window.csv'

# Supports 'USD', 'EUR' and 'both'.
# The latter will give you a single (USD) sparkline, but both averages.
def spark(currency = 'USD'):
	r = requests.get(HISTORY_URL.format(currency if currency != 'both' else 'USD'))
	f = StringIO.StringIO(r.text)
	currindex = 5 if currency == 'EUR' else 2
	try:
		reader = csv.reader(f)
		args = ""
		rows = list(reader)
		totalrows = len(rows)
		chunk = 1 if totalrows < SPARK_LENGTH else totalrows / SPARK_LENGTH
		for i, row in enumerate(rows):
			# using != 1 instead of 0 to skip the first row (which contains column headers)
			if i % chunk != 1:
				continue
			# Get value
			val = row[currindex]
			# Append to arguments
			args = args + " " + val
		os.system(SPARK + args)

		usd = float(rows[totalrows - 1][2])
		eur = float(rows[totalrows - 1][5])
		output = ''
		if currency == 'USD' or currency == 'both':
			output = output + "{0:.2f} (USD) ".format(usd)
		if currency == 'EUR' or currency == 'both':
			output = output + "{0:.2f} (EUR) ".format(eur)
		print(output)
	finally:
			f.close()

spark('both')

Shows the current value of Bitcoin in EUR or USD, as given by bitcoinaverage.com, along with a sparkline of the last 24 hours.

Requires this Spark script by @holman

Sample output:

    ██▆▆▅▅▄▃▃▅▅▆█▆▆▄▅▆▅▅▅▆▄▅▃▃▁▃▃▄▄▅
    585.02 (USD) 438.21 (EUR)