tkinter.button(command)

Definition

The Button command option execute the code.

Syntax

tkinter.button(command=variable)

Button(command=variable)

Examples

The random.randrange(a,b) is used to generate values for the creation of line.

from tkinter import *

master = Tk()

master.title("Random line draw")

def line():

import random

x1=random.randrange(0,300)

y1=random.randrange(0,300)

x2=random.randrange(0,300)

y2=random.randrange(0,300)

canvas.create_line(x1, y1, x2, y2)

canvas = Canvas(master, width=300, height=300)

canvas.pack(side=TOP)

button=Button(master, text="Click to draw random line", command=line).pack(fill=BOTH)

master.mainloop()

Random color lines are created through the random.sample and random.randrange(a,b) methods through for loop.

from tkinter import *

master = Tk()

master.title("Create random lines")

def line():

import random

color_list= ['snow', 'ghostwhite', 'whitesmoke', 'gainsboro', 'floralwhite', 'oldlace',

'linen', 'antiquewhite', 'papayawhip', 'blanchedalmond', 'bisque', 'peach puff',

'navajowhite', 'lemonchiffon', 'mint cream', 'azure', 'aliceblue', 'lavender',

'lavenderblush', 'mistyrose', 'darkslategray', 'dimgray', 'slategray',

'lightslategray', 'gray', 'lightgrey', 'midnightblue', 'navy', 'cornflowerblue', 'darkslateblue',

'slateblue', 'mediumslateblue', 'lightslateblue', 'mediumblue', 'royal blue', 'blue',

'dodgerblue', 'deepskyblue', 'skyblue', 'lightskyblue', 'steelblue', 'lightsteel blue',

'lightblue', 'powderblue', 'paleturquoise', 'darkturquoise', 'mediumturquoise', 'turquoise',

'cyan', 'lightcyan', 'cadetblue', 'mediumaquamarine', 'aquamarine', 'darkgreen', 'darkolivegreen',

'darkseagreen', 'seagreen', 'mediumseagreen', 'lightseagreen', 'palegreen', 'springgreen',

'lawngreen', 'mediumspringgreen', 'greenyellow', 'limegreen', 'yellowgreen',

'forestgreen', 'olivedrab', 'darkkhaki', 'khaki', 'palegoldenrod', 'lightgoldenrodyellow',

'lightyellow', 'yellow', 'gold', 'lightgoldenrod', 'goldenrod', 'darkgoldenrod', 'rosybrown',

'indianred', 'saddlebrown', 'sandybrown',

'darksalmon', 'salmon', 'lightsalmon', 'orange', 'darkorange',

'coral', 'lightcoral', 'tomato', 'orangered', 'red', 'hotpink', 'deeppink', 'pink', 'lightpink',

'palevioletred', 'maroon', 'mediumvioletred', 'violetred',

'mediumorchid', 'darkorchid', 'darkviolet', 'blueviolet', 'purple', 'mediumpurple',

'thistle', 'snow2', 'snow3',

'snow4', 'seashell2', 'seashell3', 'seashell4', 'AntiqueWhite1', 'AntiqueWhite2',

'AntiqueWhite3', 'AntiqueWhite4', 'bisque2', 'bisque3', 'bisque4', 'PeachPuff2',

'PeachPuff3', 'PeachPuff4', 'NavajoWhite2', 'NavajoWhite3', 'NavajoWhite4',

'LemonChiffon2', 'LemonChiffon3', 'LemonChiffon4', 'cornsilk2', 'cornsilk3',

'cornsilk4', 'ivory2', 'ivory3', 'ivory4', 'honeydew2', 'honeydew3', 'honeydew4',

'LavenderBlush2', 'LavenderBlush3', 'LavenderBlush4', 'MistyRose2', 'MistyRose3',

'MistyRose4', 'azure2', 'azure3', 'azure4', 'SlateBlue1', 'SlateBlue2', 'SlateBlue3',

'SlateBlue4', 'RoyalBlue1', 'RoyalBlue2', 'RoyalBlue3', 'RoyalBlue4', 'blue2', 'blue4',

'DodgerBlue2', 'DodgerBlue3', 'DodgerBlue4', 'SteelBlue1', 'SteelBlue2',

'SteelBlue3', 'SteelBlue4', 'DeepSkyBlue2', 'DeepSkyBlue3', 'DeepSkyBlue4',

'SkyBlue1', 'SkyBlue2', 'SkyBlue3', 'SkyBlue4', 'LightSkyBlue1', 'LightSkyBlue2',

'LightSkyBlue3', 'LightSkyBlue4', 'SlateGray1', 'SlateGray2', 'SlateGray3',

'SlateGray4', 'LightSteelBlue1', 'LightSteelBlue2', 'LightSteelBlue3',

'LightSteelBlue4', 'LightBlue1', 'LightBlue2', 'LightBlue3', 'LightBlue4',

'LightCyan2', 'LightCyan3', 'LightCyan4', 'PaleTurquoise1', 'PaleTurquoise2',

'PaleTurquoise3', 'PaleTurquoise4', 'CadetBlue1', 'CadetBlue2', 'CadetBlue3',

'CadetBlue4', 'turquoise1', 'turquoise2', 'turquoise3', 'turquoise4', 'cyan2', 'cyan3',

'cyan4', 'DarkSlateGray1', 'DarkSlateGray2', 'DarkSlateGray3', 'DarkSlateGray4',

'aquamarine2', 'aquamarine4', 'DarkSeaGreen1', 'DarkSeaGreen2', 'DarkSeaGreen3',

'DarkSeaGreen4', 'SeaGreen1', 'SeaGreen2', 'SeaGreen3', 'PaleGreen1', 'PaleGreen2',

'PaleGreen3', 'PaleGreen4', 'SpringGreen2', 'SpringGreen3', 'SpringGreen4',

'green2', 'green3', 'green4', 'chartreuse2', 'chartreuse3', 'chartreuse4',

'OliveDrab1', 'OliveDrab2', 'OliveDrab4', 'DarkOliveGreen1', 'DarkOliveGreen2',

'DarkOliveGreen3', 'DarkOliveGreen4', 'khaki1', 'khaki2', 'khaki3', 'khaki4',

'LightGoldenrod1', 'LightGoldenrod2', 'LightGoldenrod3', 'LightGoldenrod4',

'LightYellow2', 'LightYellow3', 'LightYellow4', 'yellow2', 'yellow3', 'yellow4',

'gold2', 'gold3', 'gold4', 'goldenrod1', 'goldenrod2', 'goldenrod3', 'goldenrod4',

'DarkGoldenrod1', 'DarkGoldenrod2', 'DarkGoldenrod3', 'DarkGoldenrod4',

'RosyBrown1', 'RosyBrown2', 'RosyBrown3', 'RosyBrown4', 'IndianRed1', 'IndianRed2',

'IndianRed3', 'IndianRed4', 'sienna1', 'sienna2', 'sienna3', 'sienna4', 'burlywood1',

'burlywood2', 'burlywood3', 'burlywood4', 'wheat1', 'wheat2', 'wheat3', 'wheat4', 'tan1',

'tan2', 'tan4', 'chocolate1', 'chocolate2', 'chocolate3', 'firebrick1', 'firebrick2',

'firebrick3', 'firebrick4', 'brown1', 'brown2', 'brown3', 'brown4', 'salmon1', 'salmon2',

'salmon3', 'salmon4', 'LightSalmon2', 'LightSalmon3', 'LightSalmon4', 'orange2',

'orange3', 'orange4', 'DarkOrange1', 'DarkOrange2', 'DarkOrange3', 'DarkOrange4',

'coral1', 'coral2', 'coral3', 'coral4', 'tomato2', 'tomato3', 'tomato4', 'OrangeRed2',

'OrangeRed3', 'OrangeRed4', 'red2', 'red3', 'red4', 'DeepPink2', 'DeepPink3', 'DeepPink4',

'HotPink1', 'HotPink2', 'HotPink3', 'HotPink4', 'pink1', 'pink2', 'pink3', 'pink4',

'LightPink1', 'LightPink2', 'LightPink3', 'LightPink4', 'PaleVioletRed1',

'PaleVioletRed2', 'PaleVioletRed3', 'PaleVioletRed4', 'maroon1', 'maroon2',

'maroon3', 'maroon4', 'VioletRed1', 'VioletRed2', 'VioletRed3', 'VioletRed4',

'magenta2', 'magenta3', 'magenta4', 'orchid1', 'orchid2', 'orchid3', 'orchid4', 'plum1',

'plum2', 'plum3', 'plum4', 'MediumOrchid1', 'MediumOrchid2', 'MediumOrchid3',

'MediumOrchid4', 'DarkOrchid1', 'DarkOrchid2', 'DarkOrchid3', 'DarkOrchid4',

'purple1', 'purple2', 'purple3', 'purple4', 'MediumPurple1', 'MediumPurple2',

'MediumPurple3', 'MediumPurple4', 'thistle1', 'thistle2', 'thistle3', 'thistle4',

'gray1', 'gray2', 'gray3', 'gray4', 'gray5', 'gray6', 'gray7', 'gray8', 'gray9', 'gray10',

'gray11', 'gray12', 'gray13', 'gray14', 'gray15', 'gray16', 'gray17', 'gray18', 'gray19',

'gray20', 'gray21', 'gray22', 'gray23', 'gray24', 'gray25', 'gray26', 'gray27', 'gray28',

'gray29', 'gray30', 'gray31', 'gray32', 'gray33', 'gray34', 'gray35', 'gray36', 'gray37',

'gray38', 'gray39', 'gray40', 'gray42', 'gray43', 'gray44', 'gray45', 'gray46', 'gray47',

'gray48', 'gray49', 'gray50', 'gray51', 'gray52', 'gray53', 'gray54', 'gray55', 'gray56',

'gray57', 'gray58', 'gray59', 'gray60', 'gray61', 'gray62', 'gray63', 'gray64', 'gray65',

'gray66', 'gray67', 'gray68', 'gray69', 'gray70', 'gray71', 'gray72', 'gray73', 'gray74',

'gray75', 'gray76', 'gray77', 'gray78', 'gray79', 'gray80', 'gray81', 'gray82', 'gray83',

'gray84', 'gray85', 'gray86', 'gray87', 'gray88', 'gray89', 'gray90', 'gray91', 'gray92',

'gray93', 'gray94', 'gray95', 'gray97', 'gray98', 'gray99']

color=random.sample(color_list,1)

for i in range(0,100):

x1=i+random.randrange(0,200)

y1=i+random.randrange(0,200)

x2=i+random.randrange(0,200)

y2=i+random.randrange(0,200)

canvas.create_line(x1, y1, x2, y2, fill=color)

canvas = Canvas(master, width=300, height=300, background="black")

canvas.pack(side=TOP)

button=Button(master, text="Click to create random lines", command=line).pack(fill=BOTH)

master.mainloop()

The tkinter.Canvas create polygon method is used to create the random polygon point values and color is filled through random.sample method.

from tkinter import *

master = Tk()
master.title("Python Lake: Create random Polygons")

def line():
import random
  color_list= ['snow', 'ghostwhite', 'whitesmoke', 'gainsboro', 'floralwhite', 'oldlace',
'linen', 'antiquewhite', 'papayawhip', 'blanchedalmond', 'bisque', 'peachpuff',
'navajowhite', 'lemonchiffon', 'mintcream', 'azure', 'aliceblue', 'lavender',
'lavenderblush', 'mistyrose', 'darkslategray', 'dimgray', 'slategray',
'lightslategray', 'gray', 'lightgrey', 'midnightblue', 'navy', 'cornflowerblue', 'darkslateblue',
'slateblue', 'mediumslateblue', 'lightslateblue', 'mediumblue', 'royalblue', 'blue',
'dodgerblue', 'deepskyblue', 'skyblue', 'lightskyblue', 'steelblue', 'lightsteelblue',
'lightblue', 'powderblue', 'paleturquoise', 'darkturquoise', 'mediumturquoise', 'turquoise',
'cyan', 'lightcyan', 'cadetblue', 'mediumaquamarine', 'aquamarine', 'darkgreen', 'darkolivegreen',
'darkseagreen', 'seagreen', 'mediumseagreen', 'lightseagreen', 'palegreen', 'springgreen',
'lawngreen', 'mediumspringgreen', 'greenyellow', 'limegreen', 'yellowgreen',
'forestgreen', 'olivedrab', 'darkkhaki', 'khaki', 'palegoldenrod', 'lightgoldenrodyellow',
'lightyellow', 'yellow', 'gold', 'lightgoldenrod', 'goldenrod', 'darkgoldenrod', 'rosybrown',
'indianred', 'saddlebrown', 'sandybrown',
'darksalmon', 'salmon', 'lightsalmon', 'orange', 'darkorange',
'coral', 'lightcoral', 'tomato', 'orangered', 'red', 'hotpink', 'deeppink', 'pink', 'lightpink',
'palevioletred', 'maroon', 'mediumvioletred', 'violetred',
'mediumorchid', 'darkorchid', 'darkviolet', 'blueviolet', 'purple', 'mediumpurple',
'thistle', 'snow2', 'snow3',
'snow4', 'seashell2', 'seashell3', 'seashell4', 'AntiqueWhite1', 'AntiqueWhite2',
'AntiqueWhite3', 'AntiqueWhite4', 'bisque2', 'bisque3', 'bisque4', 'PeachPuff2',
'PeachPuff3', 'PeachPuff4', 'NavajoWhite2', 'NavajoWhite3', 'NavajoWhite4',
'LemonChiffon2', 'LemonChiffon3', 'LemonChiffon4', 'cornsilk2', 'cornsilk3',
'cornsilk4', 'ivory2', 'ivory3', 'ivory4', 'honeydew2', 'honeydew3', 'honeydew4',
'LavenderBlush2', 'LavenderBlush3', 'LavenderBlush4', 'MistyRose2', 'MistyRose3',
'MistyRose4', 'azure2', 'azure3', 'azure4', 'SlateBlue1', 'SlateBlue2', 'SlateBlue3',
'SlateBlue4', 'RoyalBlue1', 'RoyalBlue2', 'RoyalBlue3', 'RoyalBlue4', 'blue2', 'blue4',
'DodgerBlue2', 'DodgerBlue3', 'DodgerBlue4', 'SteelBlue1', 'SteelBlue2',
'SteelBlue3', 'SteelBlue4', 'DeepSkyBlue2', 'DeepSkyBlue3', 'DeepSkyBlue4',
'SkyBlue1', 'SkyBlue2', 'SkyBlue3', 'SkyBlue4', 'LightSkyBlue1', 'LightSkyBlue2',
'LightSkyBlue3', 'LightSkyBlue4', 'SlateGray1', 'SlateGray2', 'SlateGray3',
'SlateGray4', 'LightSteelBlue1', 'LightSteelBlue2', 'LightSteelBlue3',
'LightSteelBlue4', 'LightBlue1', 'LightBlue2', 'LightBlue3', 'LightBlue4',
'LightCyan2', 'LightCyan3', 'LightCyan4', 'PaleTurquoise1', 'PaleTurquoise2',
'PaleTurquoise3', 'PaleTurquoise4', 'CadetBlue1', 'CadetBlue2', 'CadetBlue3',
'CadetBlue4', 'turquoise1', 'turquoise2', 'turquoise3', 'turquoise4', 'cyan2', 'cyan3',
'cyan4', 'DarkSlateGray1', 'DarkSlateGray2', 'DarkSlateGray3', 'DarkSlateGray4',
'aquamarine2', 'aquamarine4', 'DarkSeaGreen1', 'DarkSeaGreen2', 'DarkSeaGreen3',
'DarkSeaGreen4', 'SeaGreen1', 'SeaGreen2', 'SeaGreen3', 'PaleGreen1', 'PaleGreen2',
'PaleGreen3', 'PaleGreen4', 'SpringGreen2', 'SpringGreen3', 'SpringGreen4',
'green2', 'green3', 'green4', 'chartreuse2', 'chartreuse3', 'chartreuse4',
'OliveDrab1', 'OliveDrab2', 'OliveDrab4', 'DarkOliveGreen1', 'DarkOliveGreen2',
'DarkOliveGreen3', 'DarkOliveGreen4', 'khaki1', 'khaki2', 'khaki3', 'khaki4',
'LightGoldenrod1', 'LightGoldenrod2', 'LightGoldenrod3', 'LightGoldenrod4',
'LightYellow2', 'LightYellow3', 'LightYellow4', 'yellow2', 'yellow3', 'yellow4',
'gold2', 'gold3', 'gold4', 'goldenrod1', 'goldenrod2', 'goldenrod3', 'goldenrod4',
'DarkGoldenrod1', 'DarkGoldenrod2', 'DarkGoldenrod3', 'DarkGoldenrod4',
'RosyBrown1', 'RosyBrown2', 'RosyBrown3', 'RosyBrown4', 'IndianRed1', 'IndianRed2',
'IndianRed3', 'IndianRed4', 'sienna1', 'sienna2', 'sienna3', 'sienna4', 'burlywood1',
'burlywood2', 'burlywood3', 'burlywood4', 'wheat1', 'wheat2', 'wheat3', 'wheat4', 'tan1',
'tan2', 'tan4', 'chocolate1', 'chocolate2', 'chocolate3', 'firebrick1', 'firebrick2',
'firebrick3', 'firebrick4', 'brown1', 'brown2', 'brown3', 'brown4', 'salmon1', 'salmon2',
'salmon3', 'salmon4', 'LightSalmon2', 'LightSalmon3', 'LightSalmon4', 'orange2',
'orange3', 'orange4', 'DarkOrange1', 'DarkOrange2', 'DarkOrange3', 'DarkOrange4',
'coral1', 'coral2', 'coral3', 'coral4', 'tomato2', 'tomato3', 'tomato4', 'OrangeRed2',
'OrangeRed3', 'OrangeRed4', 'red2', 'red3', 'red4', 'DeepPink2', 'DeepPink3', 'DeepPink4',
'HotPink1', 'HotPink2', 'HotPink3', 'HotPink4', 'pink1', 'pink2', 'pink3', 'pink4',
'LightPink1', 'LightPink2', 'LightPink3', 'LightPink4', 'PaleVioletRed1',
'PaleVioletRed2', 'PaleVioletRed3', 'PaleVioletRed4', 'maroon1', 'maroon2',
'maroon3', 'maroon4', 'VioletRed1', 'VioletRed2', 'VioletRed3', 'VioletRed4',
'magenta2', 'magenta3', 'magenta4', 'orchid1', 'orchid2', 'orchid3', 'orchid4', 'plum1',
'plum2', 'plum3', 'plum4', 'MediumOrchid1', 'MediumOrchid2', 'MediumOrchid3',
'MediumOrchid4', 'DarkOrchid1', 'DarkOrchid2', 'DarkOrchid3', 'DarkOrchid4',
'purple1', 'purple2', 'purple3', 'purple4', 'MediumPurple1', 'MediumPurple2',
'MediumPurple3', 'MediumPurple4', 'thistle1', 'thistle2', 'thistle3', 'thistle4',
'gray1', 'gray2', 'gray3', 'gray4', 'gray5', 'gray6', 'gray7', 'gray8', 'gray9', 'gray10',
'gray11', 'gray12', 'gray13', 'gray14', 'gray15', 'gray16', 'gray17', 'gray18', 'gray19',
'gray20', 'gray21', 'gray22', 'gray23', 'gray24', 'gray25', 'gray26', 'gray27', 'gray28',
'gray29', 'gray30', 'gray31', 'gray32', 'gray33', 'gray34', 'gray35', 'gray36', 'gray37',
'gray38', 'gray39', 'gray40', 'gray42', 'gray43', 'gray44', 'gray45', 'gray46', 'gray47',
'gray48', 'gray49', 'gray50', 'gray51', 'gray52', 'gray53', 'gray54', 'gray55', 'gray56',
'gray57', 'gray58', 'gray59', 'gray60', 'gray61', 'gray62', 'gray63', 'gray64', 'gray65',
'gray66', 'gray67', 'gray68', 'gray69', 'gray70', 'gray71', 'gray72', 'gray73', 'gray74',
'gray75', 'gray76', 'gray77', 'gray78', 'gray79', 'gray80', 'gray81', 'gray82', 'gray83',
'gray84', 'gray85', 'gray86', 'gray87', 'gray88', 'gray89', 'gray90', 'gray91', 'gray92',
'gray93', 'gray94', 'gray95', 'gray97', 'gray98', 'gray99']

  for i in range(0,200):
x1=i+random.randrange(0,300)
y1=i+random.randrange(0,300)
x2=i+random.randrange(0,300)
y2=i+random.randrange(0,300)
x3=i+random.randrange(0,300)
y3=i+random.randrange(0,300)
x4=i+random.randrange(0,300)
y4=i+random.randrange(0,300)
x5=i+random.randrange(0,300)
y5=i+random.randrange(0,300)
x6=i+random.randrange(0,300)
y6=i+random.randrange(0,300)

  pt=[x1,y1,x2,y2,x3,y3,x4,y4,x5,y5,x6,y6]

color=random.sample(color_list,1)
canvas.create_polygon(pt, outline=color, fill=color)


canvas = Canvas(master, width=500, height=500, background="black")
canvas.pack(side=TOP)

button=Button(master, text="Click here to create random polygons", command=line).pack(fill=BOTH)

master.mainloop()

The URL is opened through tkinter.Button() through its command option.

import webbrowser

from tkinter import*

def url():

url=webbrowser.open_new("www.pythonlake.com")

master=Tk()

master.geometry("100x200")

button=Button(master, text="pythonlake.com", command=url)

button.pack()

master.mainloop()

Button(command=Entry.get()

The Entry.get() input text verified through Button(command).

from tkinter import*

master=Tk()

master.title("Login")

def validate1():

if entry.get()=="pythonlake":

label1=Label(master, text="Welcome")

label1.grid(row=0,column=3)

entry.destroy()

button.destroy()

label.destroy()

else:

label2=Label(master, text="You are not authorized", background="red", fg="white")

label2.grid(row=0,column=3)

label=Label(master, text="Enter your username: ")

label.grid(row=0,column=0)

entry=Entry(master)

entry.grid(row=0,column=1)

button=Button(master, text="Submit",command=validate1)

button.grid(row=0,column=2)

master.mainloop()

The button command function is used to invoke the message box to display the random value.

from tkinter import*

master = Tk()

master.title("Random Widget")

def random_value():

import random

random1=random.random()

messagebox.showinfo("Random Value is", random1)

labelframe=LabelFrame(master, fg="red", font=14, text="Random value generator")

labelframe.pack(side=BOTTOM)

button = Button(labelframe, text = "Click here", fg="blue", command = random_value)

button.pack(side=BOTTOM)

label = Label(labelframe, text = "Click on button to generate random value")

label.pack(side=BOTTOM)

master.mainloop()

The tkinter.Entry is used to check the string characteristics through string methods.

from tkinter import*

master=Tk()
master.title("String methods")

def cap():
  try:
c=str.capitalize(s.get())
s.set(c)

  except ValueError:
  pass

def cfold():
try:
c=str.casefold(s.get())
s.set(c)

except ValueError:
pass

def ifier():
try:
if str.isidentifier(s.get())==True:
s.set("Yes")

else:
s.set("No")

except ValueError:
pass

def ipace():
try:
if str.isspace(s.get())==True:
s.set("Yes")

else:
s.set("No")

except ValueError:
pass

def iric():
try:
if str.isnumeric(s.get())==True:
s.set("Yes")
else:
s.set("No")

except ValueError:
pass

def ower():
try:
if str.islower(s.get())==True:
s.set("Yes")

else:
s.set("No")

except ValueError:
pass

def inum():
try:
if str.isalnum(s.get())==True:
s.set("Yes")

else:
s.set("No")
except ValueError:
pass

def imal():
try:
if str.isdecimal(s.get())==True:
s.set("Yes")

else:
s.set("No")

except ValueError:
pass



def igit():
try:
if str.isdigit(s.get())==True:
s.set("Yes")

else:
s.set("No")

except ValueError:
pass

def clr():
try:
s.set("")


except ValueError:
pass

s = StringVar()

entry=Entry(master, textvariable=s)
entry.grid(row=0, columnspan=4, sticky=W+E)

button_capitalize=Button(master, text="capitalize", width=10, command=cap)
button_capitalize.grid(row=2, column=0)

button_casefold=Button(master, text="casefold",width=10, command=cfold)
button_casefold.grid(row=2, column=1)

button_isidentifier=Button(master, text="isidentifier",width=10,command=ifier)
button_isidentifier.grid(row=2, column=2)

button_isspace=Button(master, text="isspace",width=10, command=ipace)
button_isspace.grid(row=3, column=0)

button_endswith=Button(master, text="endswith", width=10, command=iric)
button_endswith.grid(row=3, column=1)

button_islower=Button(master, text="islower",width=10, command=ower)
button_islower.grid(row=3, column=2)

button_isalnum=Button(master, text="isalnum",width=10, command=inum)
button_isalnum.grid(row=4, column=0)

button_isdecimal=Button(master, text="isdecimal",width=10, command=imal)
button_isdecimal.grid(row=4, column=1)

button_isdigit=Button(master, text="isdigit",width=10, command=igit)
button_isdigit.grid(row=4, column=2)

button_clear=Button(master, text="Clear", command=clr )
button_clear.grid(row=5, columnspan=3,sticky=W+E)