June 2025
Intermediate to advanced
515 pages
17h 5m
English
Content preview from Python For Engineering and Scientific Computing
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11.4 Slider
The slider control enables you to use the mouse pointer to continuously adjust values for variables. The Scale(main, parmeterlist) method creates a slider object.
Listing 11.5 calculates the moment of inertia for a solid steel cylinder with a length of 1 meter (m) for cylinder diameters from 50 to 200 millimeters (mm).
01 #05_slider.py02 import tkinter as tk03 main=tk.Tk()04 #moment of inertia05 def moment_of_inertia(self):06 pi=3.1415907 rho=7.85 #Density of steel kg/dm^308 l=10 #Length of the cylinder in dm09 d=sldD.get() #Diameter in mm10 d=1e-2*d #Conversion to dm11 J = rho*l*pi*d**4/32 #in kgdm^212 J=('{0:5.3f}'.format(1e-2*J)) #Conversion to m13 lblD["text"] = "J=" + str(J) + " kgm^2"14 #generate slider object15 sldD=tk. ...
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