Python function eg - Day 20

this will explain how to create a funtion in python and call it,if the funtion doesnot returns any value then it will be treated as none

to view the definition of the function you can do -- ctrl + left click

  
def python_food():
    print("Spinach is good for health")

python_food()
print (python_food())

def center_text():
    width = 50
    text = 'Spinach is good for health'
    leftalignment = (width - len(text))//2
    print(' '*leftalignment,text)

center_text()
print('='*20)

def center_text1(text):
    width = 50
    leftalignment = (width - len(text))//2
    print(' '*leftalignment,text)



center_text1('Spinach is Good for Health')
center_text1('Excecise is goood for body')
center_text1('Life is worth living')
center_text1('Love yourself')
 

the below code is the text behind the print function,we can see only the basic info not the code since this is written in C-language

 
 
def print(self, *args, sep=' ', end='\n', file=None): # known special case of print
    """
    print(value, ..., sep=' ', end='\n', file=sys.stdout, flush=False)
    
    Prints the values to a stream, or to sys.stdout by default.
    Optional keyword arguments:
    file:  a file-like object (stream); defaults to the current sys.stdout.
    sep:   string inserted between values, default a space.
    end:   string appended after the last value, default a newline.
    flush: whether to forcibly flush the stream.
    """
    pass
 

Python tkinter - Calculator GUI - Day 20

this is the code for the model calculator,it is just a GUI,funtionality will be implemented in later lessons

  
import tkinter

keys = [[('C','1'),('CE','1')],
        [('7','1'),('8','1'),('9','1'),('+','1')],
        [('4','1'),('5','1'),('6','1'),('-','1')],
        [('1','1'),('2','1'),('3','1'),('*','1')],
        [('0','1'),('=','1'),('/','1')]]

mainWindowPadding = 10

mainWindow = tkinter.Tk()
mainWindow.title("Calculator")
mainWindow.geometry("800x480-8+200")
mainWindow["padx"]= mainWindowPadding

result = tkinter.Entry(mainWindow)
result.grid(row=0,column=0,sticky = 'nsew')

keypad = tkinter.Frame(mainWindow)
keypad.grid(row=1,column=0,sticky = 'nsew')

row = 0
for keyrow in keys:
    column = 0
    for key in keyrow:
        tkinter.Button(keypad,text = key[0]).grid(row=row,column=column,
columnspan = key[1],sticky ='ew')
        column+=1
    row+=1


mainWindow.update()
mainWindow.minsize(keypad.winfo_width()+mainWindowPadding,result.winfo_height()
+keypad.winfo_height())
mainWindow.maxsize(keypad.winfo_width()+50 + mainWindowPadding,result.winfo_height()+50 
+ keypad.winfo_height())
mainWindow.mainloop()