#!/usr/bin/python3
def main() :
	#containers
	tpl=(1,2,3,4)
	ml=[1,2,3,4] #lista(den einai pinakes giati den mporw na exw thn pra3i tou pollaplasiasmou)
	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)
	m12=ml+ml #edw den einai h pros8esi einai h sinenosi
	print (*m12)
	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()