交易收盘价走势图

import json
import pygal
import math
from itertools import groupby

#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'])))

#调用Line()函数:
# x_label_rotation:x轴标签沿顺时针旋转角度,
# show_minor_x_labels：不用显示所有的坐标
line_chart = pygal.Line(x_label_rotation=20, show_minor_x_labels=False) 
line_chart.title = '收盘价（￥）'
line_chart.x_labels = dates
N = 20  # x轴坐标每隔20天显示一次
line_chart.x_labels_major = dates[::N]  
line_chart.add('收盘价', close)
line_chart.render_to_file('收盘价折线图（￥）.svg')

line_chart = pygal.Line(x_label_rotation=20,show_minor_x_labels=False) 
line_chart.title = '收盘价对数转换（dollar）'
line_chart.x_labels = dates
N=20  #x轴每隔20天显示一次
line_chart.x_labels_major = dates[::N]
close_log = [math.log10(_) for _ in close]
line_chart.add('log收盘价',close_log)
line_chart.render_to_file('收盘价对数变换折线图（￥）.svg')

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

idx_week = dates.index('2017-12-11')
line_chart_week = draw_line(
	weeks[1:idx_week], close[1:idx_week], '收盘价周日均值（￥）', '周日均值')
line_chart_week

idx_week = dates.index('2017-12-11')
wd = ['Monday', 'Tuesday', 'Wednesday',
		'Thursday', 'Friday', 'Saturday', 'Sunday']
weekdays_int = [wd.index(w) + 1 for w in weekdays[1:idx_week]]
line_chart_weekday = draw_line(
	weekdays_int, close[1:idx_week], '收盘价星期均值（￥）', '星期均值')
line_chart_weekday.x_labels = ['周一', '周二', '周三', '周四', '周五', '周六', '周日']
line_chart_weekday.render_to_file('收盘价星期均值（￥）.svg')
line_chart_weekday

with open('收盘价Dashboard.html', 'w', encoding='utf8') as html_file:
	html_file.write(
		'\n')
	for svg in  [
			'收盘价折线图（￥）.svg', '收盘价对数变换折线图（￥）.svg', '收盘价月日均值（￥）.svg',
			'收盘价周日均值（￥）.svg', '收盘价星期均值（￥）.svg'
	]:
		html_file.write(                                       
			'    \n'.format(svg))
	html_file.write('')