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Python 2

• tests: if: .... else: ....
• Loops:
• Plots

import matplotlib.pyplot as plt

plt.plot([1,2,3], [1,2,3], 'k')

plt.show()

• Séries temporelles

Série temporelle et plot

import requests

import json

import datetime

import time

import csv

from pathlib import Path

export_file = Path("bitcoin_export.csv")

if export_file.is_file():

	pass

else:

	t = csv.writer(open("bitcoin_export.csv", "a"))
	csv_header_window = ("Date", "USD_Price", "Variation", "Diff")
	t.writerow(csv_header_window)

  # Input variables

duration_experience = input("Please enter the duration of the experience in minutes (eg 60): ")

duration_experience = int(duration_experience)

duration_experience = duration_experience*60

bitcoin_frequency = input("Please enter the frequency to update bitcoin value in minutes (eg 1) : ")

bitcoin_frequency = int(bitcoin_frequency)

start_time = time.time()

stop_time = start_time+duration_experience

global actual_time

actual_time = start_time

print(start_time, stop_time)

print("Capture in progress")

while actual_time < stop_time:

	r = requests.get('http://api.coindesk.com/v1/bpi/currentprice.json')
	bitcoin_data = dict(r.json())
	bitcoin_value = bitcoin_data["bpi"]["USD"]["rate_float"]
	print("Actual Bitcoin pricing ", bitcoin_value, "$")
	if 'last_bitcoin_value' in locals():
		if bitcoin_value > last_bitcoin_value:
			bitcoin_variation = "+"
		elif bitcoin_value < last_bitcoin_value:
			bitcoin_variation = "-"
		else : 
			bitcoin_variation = "="
		bitcoin_diff= bitcoin_value - last_bitcoin_value
		now = datetime.datetime.now()
		t = csv.writer(open("bitcoin_export.csv", "a"))
		export_data = now.strftime("%Y/%m/H:%M"), bitcoin_value, bitcoin_variation,bitcoin_diff
		t.writerow(export_data)
	else:
		now = datetime.datetime.now()
		t = csv.writer(open("bitcoin_export.csv", "a"))
		export_data = now.strftime("%Y/%m/H:%M"), bitcoin_value, None, None
		t.writerow(export_data)
	last_bitcoin_value = bitcoin_value
	actual_time = time.time()
	time.sleep(bitcoin_frequency*60)

print("Capture stopped")