Александр

a = [1,2,3,4,5,6,7]
for i in range(len(a)-1,0,-1):
	b = a[i-1:i+1]
	b.reverse()
	print(b)

for file in os.listdir(input_dir):
    if file not in ['myfile1.txt','myfile2.txt']:
        os.unlink(os.path.join(input_dir,file))

SELECT `test_resalt_LQ` AS `x_val` ,count(*) AS `y_val` 
FROM `table` 
GROUP BY `test_resalt_LQ` 
ORDER BY `test_resalt_LQ` ASC

document.querySelectorAll('p').forEach((item)=>{item.addEventListener('click', function (){

		this.innerHTML= Math.pow(parseInt(this.innerHTML),2);

})})

from tkinter import *
m = PanedWindow(orient=VERTICAL, bg="blue")
m.pack(fill=BOTH, expand=1)
top = Label(m, text="top pane", bg="red")
m.add(top)
bottom = Label(m, text="bottom pane", bg="green")
m.add(bottom)
mainloop()