Wie kann ich Textboxes zu einer List/Array hinzufügen

[Brando]

Folgender Code:

Code: Alles auswählen

from sympy.matrices import *
from sympy.printing import *
from IPython.display import display, HTML, Math, Latex, clear_output
from ipywidgets import widgets
from random import randint
import numpy as np
from builtins import str
 
text1 = widgets.Text()
text=[] 
button1 = widgets.Button(description="Auswerten")
button2 = widgets.Button(description="Neue Aufgabe")
 
#x = np.arange(9).reshape(3,3)
#y = np.arange(3).reshape(3,1)
x=Matrix()
y=Matrix()
latexWidget = widgets.Latex()
 
taskWidget = widgets.HTML()
taskWidget.value = "<b>Berechnen Sie:</b>"
 
mhbox1 = widgets.HBox((taskWidget, latexWidget))
mhbox2 = widgets.HBox((button1, button2))
cb_container= []


 
def init_vectors(b):
        global x, y, text1, text, cb_container
        cb_container=[]
        cb_container.append(widgets.HBox())
        cb_container.append(widgets.HBox())
        cb_container.append(widgets.HBox())

        for j in range(3):
           for i in range(3):
             text.append(widgets.Text(width=40))
           
           cb_container[j].children=[i for i in text]
           text=[]
        x=zeros(3,3)
        y=zeros(3,1)
        for i in range(3):
            for j in range(3):
             x[j,i]=randint(-10,10)

        for i in range(1):
            for j in range(3):
               y[j,i]=randint(-10,10)
        
        #n_matrix_x=np.eye(3)
        n_matrix_x=np.matrix(x).astype(float)
        
        gefunden=False
        if np.linalg.det(n_matrix_x)==0:
            init_vectors(b)
        else: 
            A,B=np.linalg.eig(n_matrix_x)
            for i in range(3):
               if A[i].real==0 or A[i].imag!=0:
                 gefunden=True
                 break
               
            
            
            n_matrix_x=np.matrix(x).astype(float)
            n_matrix_y=np.matrix(y).astype(float)
            z = np.linalg.solve(n_matrix_x,n_matrix_y)
            for i in range(3):
                if z[i,0]!= int(z[i,0]):
                   gefunden=True
                   break
            
            if gefunden:
                 init_vectors(b)      
                 
        text1.value = ""
        display_task()
 
def display_task():
        global x, y, latexWidget
 
        clear_output()
 
        a1 = latex(x)
        a2 = latex(y)
 
        a1 = a1.replace("left[", "left(")
        a2 = a2.replace("left[", "left(")
        a1 = a1.replace("right]", "right)")
        a2 = a2.replace("right]", "right)")
 
        str1 = "$\langle" + a1 + ", " + a2 + "\\rangle$"
        latexWidget.value = str1
 
def evaluate(b):
        global x, y, text1
        n_matrix_x=np.matrix(x).astype(float)
        n_matrix_y=np.matrix(y).astype(float)
        z = np.linalg.solve(n_matrix_x,n_matrix_y)
        w=widgets.Textarea(Description='Lösung GLS',
                 value=str(z)
                 )
        display(w)
 
        clear_output()
        display_task()
        loesung_gefunden=True
        for i in range(3):
            if z[i,0]!=int(text[i].value):
               loesung_gefunden=False
               break
        if loesung_gefunden:
                display(HTML("<b><font color='green'>Richtig</font></b>"))
        else:
                display(HTML("<b><font color='red'>Falsch</font></b>"))
 
 
def exec_la_scalar_1():
        init_vectors(button2)
        button2.on_click(init_vectors)
        button1.on_click(evaluate)
        display(widgets.VBox(mhbox1))
        display(widgets.VBox(cb_container[0]))
        display(widgets.VBox(mhbox2))

Die Zeile cb_container[j].children= funktioniert nicht. Es kommt folgende Fehlermeldung:

TraitError: The 'children' trait of a FlexBox instance must be a tuple, but a value of class 'ipywidgets.widgets.widget_box.FlexBox' (i.e. <ipywidgets.widgets.widget_box.FlexBox object at 0x7f2abf20c9b0>) was specified.


Wenn ich cb_container nicht als Feld/Liste definiere dann funktioniert der Code. Woran liegt das?

[Brando]

Mein Mustercode lautet wie folgt und er funktioniert:

Code: Alles auswählen

%matplotlib notebook
import pandas as pd
import matplotlib.pyplot as plt
from ipywidgets import *
from IPython.display import display
from IPython.html import widgets
plt.style.use('ggplot')

NUMBER_OF_PINGS = 4

# displaying the text widget
text = widgets.Text(description="Domain to ping", width=200)
display(text)

# preparing the plot 
data = pd.DataFrame()
x = range(1,NUMBER_OF_PINGS+1)
plots = dict()
fig, ax = plt.subplots()
plt.xlabel('iterations')
plt.ylabel('ms')
plt.xticks(x)
plt.show()

# preparing a container to put in created checkbox per domain
checkboxes = []
cb_container = widgets.HBox()
display(cb_container)

# add button that updates the graph based on the checkboxes
button = widgets.Button(description="Update the graph")

# function to deal with the added domain name
def handle_submit(sender):
    # a part of the magic inside python : pinging
    res = !ping -c {NUMBER_OF_PINGS} {text.value}
    hits = res.grep('64 bytes').fields(-2).s.replace("time=","").split()
    if len(hits) == 0:
        print "Domain gave error on pinging"
    else:
         # rebuild plot based on ping result
        data[text.value] = hits
        data[text.value] = data[text.value].astype(float)
        plots[text.value], = ax.plot(x, data[text.value], label=text.value)
        plt.legend()
        plt.draw()
        # add a new checkbox for the new domain
        checkboxes.append(widgets.Checkbox(description = text.value, value=True, width=90))
        cb_container.children=[i for i in checkboxes]
        if len(checkboxes) == 1:
            display(button)

# function to deal with the checkbox update button       
def on_button_clicked(b):
    for c in cb_container.children:
        if not c.value:
            plots[c.description].set_visible(False)
        else:
            plots[c.description].set_visible(True)
    plt.legend()
    plt.draw()

button.on_click(on_button_clicked)
text.on_submit(handle_submit)
plt.show()