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

0 vote205 views1 answer
Remove tab space from string in python
Python
0 vote218 views1 answer
Corona data with python flask get pdf
Python Flask
1 vote196 views1 answer
How to get prime numbers in a list in python using list comprehension
Python
5 votes211 views3 answers
Multiple variables in for loop python
Python
3 votes176 views1 answer
Knowing the sum of null value is pandas dataframe
Python
0 vote185 views1 answer
Convert 1 to "one" python
Python
1 vote205 views2 answers
Divide a value by all values in a list
Python
7 votes196 views5 answers
Pandas split train test
Python
7 votes198 views4 answers
How to get all the keys of a dictionary in python
Python
6 votes203 views4 answers
Import user in django
Python