Python tipi array

1) lista: è elenco ordinato di oggetti 'come php array numerico'
  a=[1,2,3]
  dir(a) ritorna i metodi: a.append("test")
2) tupla: è un elenco immutabile
  t= ("1","2",3,4,5)
  pro: speed + less memory consuming
3) set: è un insieme
  operazioni insiemistiche(unione con '|' o '.union', differenza '-',
                           intersezione '&'), elimina i duplicati
  s=set(["a","b","c"])
  s2=set(["d","c"])
  s3_intersection=s & s2 
  s4_union= s | s2
  s5_diff= s-s2
  print(s3_intersection) {"c"}       'quelli in comune'
  print(s4_union) {"a","b","d","c"}  'tutti no dupl'
  print(s5_diff) {"a","b","d"}
 4) Dizionario 'ricorda 1 json o array definito di php'
  people = {'George':35, 'Alex':3, 'Emma':32)
  print(people['Alex'])   res:3
  print(people.keys())    res: 'George', 'Alex', 'Emma'

Similar codes

14 votes190 views6 answers
Install django
Python
0 vote200 views1 answer
How to send audio with inline telebot
Python
-1 vote191 views1 answer
How to normalize a 1d numpy array
Python
0 vote175 views1 answer
How to not round numbers in python
Python
3 votes192 views2 answers
Change django administration text
Python
0 vote200 views1 answer
Unity python
Python
0 vote199 views1 answer
Coger elementos de un string python expresiones regulares
Python
8 votes319 views5 answers
Django message framework
Python Django
2 votes186 views1 answer
How to return total elements in database django
Python
27 votes198 views4 answers
Random letter generator python
Python