Question

我正在制作一些简单的应用程序来绘制股票图表。我从雅虎财务中获取股票数据，而且我无法管理动态＆＃39;选择股票。我确定我的'生成凯恩＆＃39;函数运行正常，因为如果我在应用程序运行期间摆脱选择股票并在编译之前设置股票名称 - 它可以正常工作

import matplotlib

matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
import matplotlib.animation as animation
import matplotlib.pyplot as plt
from matplotlib import style
import matplotlib.dates as mdates

import tkinter as tk
from tkinter import *

import urllib
import json

import pandas as pd
import numpy as np

style.use("dark_background")

LARGE_FONT = ("Verdana", 12)

f = Figure(figsize=(5, 5), dpi=100)
graph = f.add_subplot(111)


def bytespdate2num(fmt, encoding='utf-8'):
    strconverter = mdates.strpdate2num(fmt)

    def bytesconverter(b):
        s = b.decode(encoding)
        return strconverter(s)

    return bytesconverter


def generateChart(stock):
    graph.clear()
    stockPriceUrl = 'http://chartapi.finance.yahoo.com/instrument/1.0/' + stock + '/chartdata;type=quote;range=6m/csv'

    sourceCode = urllib.request.urlopen(stockPriceUrl).read().decode()

    stockData = []
    splitSource = sourceCode.split('\n')

    for line in splitSource:
        splitLine = line.split(',')
        if len(splitLine) == 6:
            if 'values' not in line and 'labels' not in line:
                stockData.append(line)

    date, closePrice, highPrice, lowPrice, openPrice, volume = np.loadtxt(stockData, delimiter=',', unpack=True,
                                                                          converters={0: bytespdate2num('%Y%m%d')})
    graph.plot_date(date, closePrice, '')


class StockAnalyser(tk.Tk):
    def __init__(self, *args, **kwargs):
        tk.Tk.__init__(self, *args, **kwargs)
        container = tk.Frame(self)

        tk.Tk.wm_title(self, "Stock Analyser")
        tk.Tk.minsize(self, width=350, height=200)

        container.pack(side="top", fill="both", expand=True)

        container.grid_rowconfigure(0, weight=1)
        container.grid_columnconfigure(0, weight=1)

        self.frames = {}

        for F in (StartPage, StartPage2):
            frame = F(container, self)
            self.frames[F] = frame
            frame.grid(row=0, column=0, sticky="nsew")

        self.show_frame(StartPage)

    def show_frame(self, cont):
        frame = self.frames[cont]
        frame.tkraise()


class StartPage(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Pick graph stock exchange", font="LARGE_FONT")
        label.pack(pady=10, padx=10)

        stockEntry = tk.Entry(self)
        stockEntry.pack()

        button = tk.Button(self, text="next",
                           command=lambda: prepChart())
        button.pack()

        def prepChart():
            generateChart(stockEntry.get())
            controller.show_frame(StartPage2)


class StartPage2(tk.Frame):
    def __init__(self, parent, controller):
        tk.Frame.__init__(self, parent)
        label = tk.Label(self, text="Graph page", font="LARGE_FONT")
        label.pack(pady=10, padx=10)

        button = tk.Button(self, text="back to home page",
                           command=lambda: controller.show_frame(StartPage))
        button.pack()

        canvas = FigureCanvasTkAgg(f, self)
        canvas.show()

        toolbar = NavigationToolbar2TkAgg(canvas, self)
        canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=True)
        canvas._tkcanvas.pack(side=tk.BOTTOM, fill=tk.BOTH, expand=True)
        toolbar.update()


app = StockAnalyser()
app.mainloop()

Answer 1

我设法通过添加动画功能来解决这个问题。我创建了全局标志 - boolStartRefresingData，并将股票名称设置为全局，因此我可以这样做：

def animate(self):
    if boolStartRefreshingData==True:
        generateChart()

ani = animation.FuncAnimation(figure,animate,10)

单击按钮时我将标志值更改为true，然后在绘制图形的函数末尾将其更改为false

使用matplotlib和tkinter进行动态绘制图表

1 个答案: