【发布时间】：2016-03-12 15:40:47
【问题描述】：
我试图从 Bit Coin 网站绘制实时数据，但出现此错误 'ValueError: 值的长度与索引的长度不匹配'。我无法修复它。我认为这是因为我无法将不同长度的列添加到数据框中。任何人都可以为此提供帮助吗？
感谢您的帮助。
最好的问候，英坦
import matplotlib
matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
import matplotlib.animation as animation
from matplotlib import style
import pandas as pd
import numpy as np
import urllib
import json
LARG_FONT =("Verdana", 12)
style.use('ggplot')
f = Figure(figsize = (5,5), dpi=100)
a = f.add_subplot(111)
def animate(i):
dataLink = "https://btc-e.com/api/3/trades/btc_usd?limit=2000"
data = urllib.request.urlopen(dataLink)
data = data.readall().decode("utf-8")
data = json.loads(data)
data = data["btc_usd"]
data = pd.DataFrame(data)
buys = data[(data['type']=="bid")]
buys["datestamp"] = np.array(buys["timestamp"]).astype("datetime64[s]")
buyDates = (buys["datestamp"]).tolist()
sells = data[(data['type']=="ask")]
sells["datestamp"] = np.array(buys["timestamp"]).astype("datetime64[s]")
sellDates = (sells["datestamp"]).tolist()
a.clear()
a.plot_date(buyDates, buys["price"])
a.plot_date(selfDates, sells["price"])
import tkinter as tk
from tkinter import ttk
class RealOptionApp(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
tk.Tk.iconbitmap(self, default='') #Change icon of App
tk.Tk.wm_title(self, "RealOptionApp")
container = tk.Frame(self)
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, PageOne, BTCe_Page):
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=ttk.Label(self, text="StartPage", font=LARG_FONT)
label.pack(pady=10, padx=10)
button1 =ttk.Button(self, text="Agree", command=lambda: controller.show_frame(BTCe_Page))
button1.pack()
button2 =ttk.Button(self, text="Disagree", command=quit)
button2.pack()
class PageOne(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label=ttk.Label(self, text="PageOne", font=LARG_FONT)
label.pack(pady=10, padx=10)
button1 =ttk.Button(self, text="Back to Start Page", command=lambda: controller.show_frame(StartPage))
button1.pack()
button2 =ttk.Button(self, text="Go to BTCe_Page", command=lambda: controller.show_frame(BTCe_Page))
button2.pack()
class BTCe_Page(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label=ttk.Label(self, text="GraphPage", font=LARG_FONT)
label.pack(pady=10, padx=10)
button1 =ttk.Button(self, text="Back to PageOne", command=lambda: controller.show_frame(PageOne))
button1.pack()
button2 =ttk.Button(self, text="Back to Start Page", command=lambda: controller.show_frame(StartPage))
button2.pack()
canvas = FigureCanvasTkAgg(f, self)
canvas.show()
canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=True)
toolbar = NavigationToolbar2TkAgg(canvas, self)
toolbar.update
canvas._tkcanvas.pack(side=tk.TOP, fill=tk.BOTH, expand=True)
app = RealOptionApp()
ani = animation.FuncAnimation(f, animate, interval = 1000)
app.mainloop()
【问题讨论】：
标签： python pandas matplotlib dataframe urllib2