zec-difficulty.py

from bs4 import BeautifulSoup
import requests
import re
import pandas as pd
import ast

tokenre = r"t=(\d+)"

soup = BeautifulSoup(requests.get("http://www.coinwarz.com/difficulty-charts/zcash-difficulty-chart").content, "html.parser")
script = soup.find("script", text=re.compile("getJSON")).text
token = re.findall(tokenre, script)[0]
r = requests.get("http://www.coinwarz.com/ajax/diffchartdata?coinId=439&t={}".format(token))
vals = ast.literal_eval(r.content.decode('utf8'))

df = pd.DataFrame(vals)
df.index = pd.to_datetime(df[0], unit='ms')
df.index.name = 'time'
del df[0]
df.columns = ['difficulty']

# Datapoints are hourly
df['ma6'] = df['difficulty'].rolling(window=6,center=False).mean()
df['ma24'] = df['difficulty'].rolling(window=24,center=False).mean()
df['ma96'] = df['difficulty'].rolling(window=96,center=False).mean()

# plot dataset
df.plot(figsize=(15,8))

# plot last 30 days
df.loc[df.last_valid_index() - pd.Timedelta(days=30):].plot(figsize=(15,8))