btc-prices-1.py

import numpy as np
import csv
import matplotlib.pyplot as plt

# 1. Extract Bitcoin prices and number of Google searches.
bitcoin_interest = {}

with open('bitcoin-interest.csv') as f:
    reader = csv.reader(f)
    for row in reader:
        bitcoin_interest[row[0]] = row[1]
        
price_and_interest = []
with open('market-price.csv') as f:
    reader = csv.reader(f)
    for row in reader:
        # 2. Match the price with search date.
        if bitcoin_interest.get(row[0], None):
            price_and_interest.append([int(bitcoin_interest.get(row[0])),  float(row[1])])