python5个实用的技巧_python

>>> some_list = [1, 2, 3, 4, 5]
 
>>> another_list = [ x + 1 for x in some_list ]
 
>>> another_list
[2, 3, 4, 5, 6]

>>> # Set Comprehensions
>>> some_list = [1, 2, 3, 4, 5, 2, 5, 1, 4, 8]
 
>>> even_set = { x for x in some_list if x % 2 == 0 }
 
>>> even_set
set([8, 2, 4])
 
>>> # Dict Comprehensions
 
>>> d = { x: x % 2 == 0 for x in range(1, 11) }
 
>>> d
{1: False, 2: True, 3: False, 4: True, 5: False, 6: True, 7: False, 8: True, 9: False, 10: True}

>>> my_set = {1, 2, 1, 2, 3, 4}
 
>>> my_set
set([1, 2, 3, 4])

>>> from collections import Counter
>>> c = Counter( hello world )
 
>>> c
Counter({ l : 3, o : 2, : 1, e : 1, d : 1, h : 1, r : 1, w : 1})
 
>>> c.most_common(2)
[( l , 3), ( o , 2)]

>>> import json
 
>>> print(json.dumps(data)) # No indention
{"status": "OK", "count": 2, "results": [{"age": 27, "name": "Oz", "lactose_intolerant": true}, {"age": 29, "name": "Joe", "lactose_intolerant": false}]}
 
>>> print(json.dumps(data, indent=2)) # With indention
 
{
 "status": "OK",
 "count": 2,
 "results": [
 
  {
   "age": 27,
   "name": "Oz",
 
   "lactose_intolerant": true
  },
  {
   "age": 29,
 
   "name": "Joe",
   "lactose_intolerant": false
  }
 ]
 
}

from SimpleXMLRPCServer import SimpleXMLRPCServer
 
def file_reader(file_name):
 
  with open(file_name, r ) as f:
    return f.read()
 
server = SimpleXMLRPCServer(( localhost , 8000))
server.register_introspection_functions()
 
server.register_function(file_reader)
 
server.serve_forever()

import xmlrpclib
proxy = xmlrpclib.ServerProxy( http://localhost:8000/ )
 
proxy.file_reader( /tmp/secret.txt )