Created GUI based BMI Calculator using python tkinter

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Program's_Contributed_By_Contributors/Python_Programs/BMI Calculator.py

@@ -1,49 +1,127 @@
+from tkinter import *
+from tkinter import ttk
 
-#input height
-a= int(input((" Height in 1.inches or 2. feet and inches or 3.centimeters? choose and type 1 or 2 or 3 ->")))
-
-if a==1:
- Height = float(input(" Enter your height: "))
- Height*=2.54
-elif ( a==2 ):
- Height_1 = str(input(" Enter in this format: 5'4 or foot'inches ->" ))
- Height = float(Height_1[0]) *12 *2.54 + float(Height_1[2]) *2.54 
-
-
-#input weight
-b= int( input (" Weight in 1.kg or 2.pounds? choose and type 1 or 2 ->"))
-
-Weight = float( input(" Enter your Weight-> "))
-if b==2:
- Weight*=0.453592
-
-#convert height into metres
-Height = Height / 100
-
-#calculate BMI
-BMI = Weight / (Height*Height)
-
-#printing BMI
-print(f"Your Body Mass Index is: {BMI}")
-
-#printing results
-if( BMI > 0):
- if( BMI <= 16 ):
- print("You are severely underweight")
- elif( BMI <= 17 ):
- print("You are moderately underweight")
- elif( BMI <= 18.5 ):
- print("You are mildly underweight")
- elif ( BMI <= 25 ):
- print("You are healthy")
- elif ( BMI <= 30 ):
- print("You are overweight")
- elif ( BMI <= 35 ):
- print("You belong to obesity class I")
- elif ( BMI <= 40 ):
- print("You belong to obesity class II")
+root=Tk()
+root.title("BMI Calculator")
+root.geometry("668x400")
+
+#label to display the BMI Value
+ans=ttk.Label(root, text="")
+ans.grid(row=5,column=1)
+
+#label to display the status if healthy or overweight
+label2= ttk.Label(root, text="")
+label2.grid(row=6, column=1)
+
+#label to display error message
+label=ttk.Label(root,text="")
+label.grid(row = 4, column=1)
+
+#Function to check if the entry is float or not
+def isfloat(x):
+ try:
+ float(x)
+ return True
+ except:
+ return False
+
+#Enter Weight:
+ttk.Label(root, text="Enter Your Weight").grid(row=0, column=0, padx=20)
+weight=ttk.Entry(root, width=45)
+weight.grid(row = 0, column = 1, padx=30, pady = 20)
+weight_options=["Select a Unit","Weight in Kilograms (kg)","Weight in Pounds (lb)"]
+weight_value=StringVar(root)
+ttk.OptionMenu(root, weight_value, *weight_options).grid(row=0, column=2)
+def enter_wt():
+ wtg=weight.get()
+ if(weight_value.get()==weight_options[1]):
+ label.config(text="")
+ if isfloat(wtg):
+ ret = float(weight.get())
+ return ret
+ else:
+ weight.delete(0,END)
+ weight.insert(0,"SNYTAX ERROR")
+ elif(weight_value.get()==weight_options[2]):
+ label.config(text="")
+ if isfloat(wtg):
+ ret = float(weight.get())*0.453592
+ return ret
+ else:
+ weight.delete(0,END)
+ weight.insert(0,"SNYTAX ERROR")
  else:
- print("You belong to obesity class III")
-else:
- print("Enter valid details")
-
+ label.config(text="Please select a valid unit for weight")
+
+#Enter Height:
+ttk.Label(root, text="Enter Your Height").grid(row=1, column=0)
+height=ttk.Entry(root, width=45)
+height.grid(row=1, column=1, padx=30, pady=20)
+height_options=["Select a Unit","Height in Metres (m)","Height in Feet (ft)", "Height in Centimetres (cms)"]
+height_value=StringVar(root)
+ttk.OptionMenu(root, height_value, *height_options).grid(row=1, column=2)
+def enter_ht():
+ htg =height.get()
+ if(height_value.get()==height_options[1]):
+ if isfloat(htg):
+ ret= float(height.get())
+ return ret
+ else:
+ height.delete(0,END)
+ height.insert(0,"SYNTAX ERROR")
+ elif(height_value.get()==height_options[2]):
+ if isfloat(htg):
+ ret= float(height.get())*0.3048
+ return ret
+ else:
+ height.delete(0,END)
+ height.insert(0,"SYNTAX ERROR")
+ elif(height_value.get()==height_options[3]):
+ if isfloat(htg):
+ ret= float(height.get())/100
+ return ret
+ else:
+ height.delete(0,END)
+ height.insert(0,"SYNTAX ERROR")
+ else:
+ label.config(text="Please select a valid unit for height")
+
+#Function to calculate BMI
+def fun():
+ wt=enter_wt()
+ ht=enter_ht()
+ bmi=None
+ try:
+ bmi= float(wt)/(float(ht)*float(ht))
+ ans.config(text = "The BMI is: " + str(bmi))
+ if( int(wt) > 0 and round(ht) > 0):
+ if( bmi <= 16 ):
+ label2.config(text="You are severely underweight")
+ elif( round(bmi) <= 17 ):
+ label2.config(text="You are moderately underweight")
+ elif( round(bmi) <= 18.5 ):
+ label2.config(text="You are mildly underweight")
+ elif ( round(bmi) <= 25 ):
+ label2.config(text="You are healthy")
+ elif ( round(bmi) <= 30 ):
+ label2.config(text="You are overweight")
+ elif ( round(bmi) <= 35 ):
+ label2.config(text="You belong to obesity class I")
+ elif ( round(bmi) <= 40 ):
+ label2.config(text="You belong to obesity class II")
+ else:
+ label2.config(text="You belong to obesity class III")
+ else:
+ ans.config(text="")
+ label2.config(text="Enter valid details")
+ except:
+ ans.config(text="")
+ label2.config(text="")
+ pass 
+
+button =ttk.Button(root, text=''' 
+ Calculate BMI 
+ ''', command=fun)
+button.grid(row=3, column=1)
+
+root.mainloop()