Programa estatística

# coding=UTF-8
import numpy as np
from matplotlib import pylab
from scipy.stats.mstats import mquantiles
from Tkinter import *
import tkMessageBox
import tkSimpleDialog
import matplotlib.pyplot as plt



prefixo = "vetor"

def makeWidgets():
    global entries
    global entries2
    window = Tk()
    window.title('Vetores')
    form = Frame(window)
    form.pack()
    entries = {}
    entries2 ={}
    numero = tkSimpleDialog.askinteger("Vetores", "Digite o número de vetores a serem usados:")
    for ix in range(numero):
        label = "%s %s" % (prefixo , ix + 1)
        lab = Label(form, text=label)
        ent = Entry(form)
        lab.grid(row=ix, column=0)
        ent.grid(row=ix, column=1)
        entries[label] = ent


    Button(window, text="Histograma",  command=histograma).pack(side=LEFT)
    Button(window, text="Média",  command=media).pack(side=LEFT)
    Button(window, text="Mediana", command=mediana).pack(side=LEFT)
    Button(window, text="Quartis", command=quartis).pack(side=LEFT)
    Button(window, text="Desvio Padrão", command=desvio).pack(side=LEFT)

    window.mainloop()

def pegavalores():
    valores = []
    for chave, entrada in sorted(entries.items()):
        valores.append(entrada.get())
    valores = np.asarray(valores, dtype=np.float64)
    return valores



def histograma():
    histograma = pegavalores()
    pylab.grid(True)
    plt.hist(histograma)
    plt.show()

def media():
    media = pegavalores()
    valormedio = np.mean(media)
    tkMessageBox.showinfo("Média", valormedio)

def mediana():
    mediana = pegavalores()
    mediana = np.median(mediana)
    tkMessageBox.showinfo("Mediana", mediana)

def quartis():
    quartis = pegavalores()
    quartis = mquantiles(quartis, prob=[0.25, 0.5, 0.75, 1])
    y = "%s" % (quartis)
    tkMessageBox.showinfo("Quartis", y)
    plt.hist(quartis)
    plt.show()

def desvio():
    desvio = pegavalores()
    desvio = np.std(desvio)
    if desvio == 0:
        tkMessageBox.showinfo("Desvio Padrão", "Não há desvio Padrão!")
    else:
        tkMessageBox.showinfo("Desvio Padrão", desvio)
window = makeWidgets()