#!/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,c,d)=tpl
        print (f'{a},{b},{c},{d}')
       # tpl[0]=4 # apagoreyetai
        for el in ml:
               print(el)
               for i,el in enumerate(el):
               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()