Python GUI - Temperature Converter App

Author: avinashn

python_GUI_tempConverter.py

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+__author__ = 'Avinash'
+
+import tkinter as tk
+from functools import partial
+
+#global variable
+tempVal = "Celsius"
+
+
+#getting drop down value
+def store_temp(sel_temp):
+    global tempVal
+    tempVal = sel_temp
+
+
+#the main conversion
+def call_convert(rlabel1, rlabe12, inputn):
+    tem = inputn.get()
+    if tempVal == 'Celsius':
+        f = float((float(tem) * 9/5) + 32)
+        k = float((float(tem) + 273.15))
+        rlabel1.config(text="%f Fahrenheit" % f)
+        rlabe12.config(text="%f Kelvin" % k)
+    if tempVal == 'Fahrenheit':
+        c = float((float(tem) - 32) * 5/9)
+        k = c + 273
+        rlabel1.config(text="%f Celsius" % c)
+        rlabe12.config(text="%f Kelvin" % k)
+    if tempVal == 'Kelvin':
+        c = float((float(tem) - 273.15))
+        f = float((float(tem) - 273.15) * 1.8000 + 32.00)
+        rlabel1.config(text="%f Celsius" % c)
+        rlabe12.config(text="%f Fahrenheit" % f)
+    return
+
+#app window configuration and UI
+root = tk.Tk()
+root.geometry('400x150+100+200')
+root.title('Temperature Converter')
+root.configure(background='#09A3BA')
+root.resizable(width=False, height=False)
+root.grid_columnconfigure(1, weight=1)
+root.grid_rowconfigure(0, weight=1)
+
+numberInput = tk.StringVar()
+var = tk.StringVar()
+
+#label and entry field
+input_label = tk.Label(root, text="Enter temperature", background='#09A3BA', foreground="#FFFFFF")
+input_entry = tk.Entry(root, textvariable=numberInput)
+input_label.grid(row=1)
+input_entry.grid(row=1, column=1)
+
+#result label's for showing the other two temperatures
+result_label1 = tk.Label(root, background='#09A3BA', foreground="#FFFFFF")
+result_label1.grid(row=3, columnspan=4)
+result_label2 = tk.Label(root, background='#09A3BA', foreground="#FFFFFF")
+result_label2.grid(row=4, columnspan=4)
+
+#drop down initalization and setup
+dropDownList = ["Celsius", "Fahrenheit", "Kelvin"]
+dropdown = tk.OptionMenu(root, var, *dropDownList, command=store_temp)
+var.set(dropDownList[0])
+dropdown.grid(row=1, column=3)
+dropdown.config(background='#09A3BA', foreground="#FFFFFF")
+dropdown["menu"].config(background='#09A3BA', foreground="#FFFFFF")
+
+#button click
+call_convert = partial(call_convert, result_label1, result_label2, numberInput)
+result_button = tk.Button(root, text="Convert", command=call_convert, background='#09A3BA', foreground="#FFFFFF")
+result_button.grid(row=2, columnspan=4)
+
+root.mainloop()