#!/usr/bin/python3.8
def main():
	d={'key1':3,'key2':4}
	for key in d:
		print (f'{key}={d[key]}')
	for key,value in d.items():
		print (f'{key}={value}')
	ml=[i for i in range(10)]
	nd={x:x**2 for x in ml}
	s={'value1' , 'value2' , 'value3'}
	for _,el in enumerate(s):
		print (el)
	s.add('value1')
	s.add('value4')
	print("_________")
	for _,el in enumerate(s):
		print (el)
	#print (nd)
	print(s)
if__name__=="__main__":
	main()