#!/usr/bin/python3

def main() :
	#containers
	tpl=(1,2,3,4)
	ml=[1,2,3,4]
	mdic={'key1':1,'key2':2}
	print(tpl[0])
	for el in tpl:
		print(el)
	for i,el in enumerate(tpl) :
		print (f'[{i}]={el}')
	print (*tpl, sep=',')
	(a,b,_,_)=tpl
	print (f'{a},{b},{a},{b}')
	#tpl[0]=4 #apagoreuetai
	for el in ml:
		print(el)
	for i,el in enumerate(ml):
		print (f'[{i}]={el}')
	print (*ml)
	ml[0]=3.4
	print (*ml)
	ml2=ml+ml
	print (*ml2)
	for key,value in mdic.items():
		print (f'{key}={value}')
	for el in mdic.values():
		print (el)
	for key in mdic:
		print (key)
if __name__=="__main__":
	main()