from itertools import groupby
import pygal
import json
#将数据加载到一个列表中
filename = 'btc_close_2017.json'
with open(filename) as f:
btc_data = json.load(f)
dates = []
months = []
weeks = []
weekdays = []
close = []
#每一天的信息
for btc_dict in btc_data:
dates.append(btc_dict['date'])
months.append(int(btc_dict['month']))
weeks.append(int(btc_dict['week']))
weekdays.append(btc_dict['weekday'])
close.append(int(float(btc_dict['close'])))
def draw_line(x_data, y_data, title, y_legend):
xy_map = []
for x,y in groupby(sorted(zip(x_data, y_data)), key=lambda _: _[0]):
y_list = [v for _, v in y]
xy_map.append([x, sum(y_list)/len(y_list)])
x_unique, y_mean = [*zip(*xy_map)]
line_chart = pygal.Line()
line_chart.title = title
line_chart.x_labels = x_unique
line_chart.add(y_legend, y_mean)
line_chart.render_to_file(title + '.svg')
return line_chart
idx_month = dates.index('2017-12-01')
line_chart_month = draw_line(months[:idx_month], close[:idx_month], '收盘价月日均值', '月日均值')
line_chart_month
