python實(shí)現(xiàn)將列表中各個(gè)值快速賦值給多個(gè)變量

更新時(shí)間：2020年04月02日 14:12:55 作者：liu2242947853

這篇文章主要介紹了python實(shí)現(xiàn)將列表中各個(gè)值快速賦值給多個(gè)變量，具有很好的參考價(jià)值，希望對大家有所幫助。一起跟隨小編過來看看吧

我就廢話不多說啦，還是直接看代碼吧！

list1 = [1,2,3,4]
a,b,c,d = list1

則

a = 1
b =2

等

這種方式只有當(dāng)左邊的操作數(shù)個(gè)數(shù)和list1長度相同時(shí),才可以這么做,不然報(bào)錯(cuò).

我們假設(shè)我們有一個(gè)list對象List,它的長度足夠長,想把它從下標(biāo)i開始的k個(gè)元素賦給k個(gè)元素,可以這么做:

v1, v2, v3, …, vk = List[i : i + k] #默認(rèn)i=0, k=len(List)

補(bǔ)充知識：python 將某個(gè)字段存儲(chǔ)為列表類型

實(shí)現(xiàn)存儲(chǔ)數(shù)據(jù)格式為

{
    "_index": "nested-20180815",
    "_type": "stb-iptv-montor-m-gather-apk",
    "_id": "AWU8sZboGQQbsn0rAW4J",
    "_score": 1,
    "_source": {
     "mdiNested": [
      {
       "mdiMLR": 0,
       "mdiType": "0"
      },
      {
       "mdiMLR": 0,
       "mdiType": "1"
      },
      {
       "mdiMLR": 0,
       "mdiType": "2"
      },
      {
       "mdiMLR": 0,
       "mdiType": "3"
      },
      {
       "mdiMLR": 0,
       "mdiType": "4"
      },
      {
       "mdiMLR": 0,
       "mdiType": "5"
      }
     ]
    }
   }

代碼：

from elasticsearch import Elasticsearch
from elasticsearch import helpers
import json

es_20 = Elasticsearch(hosts="1.0.0.0", port=9200, timeout=15000)
time_ = "20180815"
index_20 = "nested-{0}".format(time_)
type_20 = "stb-iptv-montor-m-gather-apk"


def set_mapping():
  my_mappping = {
    type_20: {
      "properties": {
        "mdiNested": {
          "properties": {
            "mdiMLR": {
              "type": "short"
            },
            "mdiType": {
              "type": "keyword"
            }
          }
        }
      }
    }
  }
  create_index = es_20.indices.create(index=index_20, body=None)
  create_mapping = es_20.indices.put_mapping(index=index_20, body=my_mappping, doc_type=type_20)
  mdiMLR = [0,1,2,3,4]
  mdiType = ["0","1","2","3","4","5"]
  actions = []
  dict_ ={}
  for mdiMLR_ in mdiMLR:
    dict_list = []
    for type in mdiType:
      t1 ={'mdiMLR': mdiMLR_, 'mdiType': type}
      dict_list.append(t1)
    action = {
        "_index": index_20,
        "_type": type_20,
        "_source": {
          "mdiNested": dict_list
        }
    }
    actions.append(action)
  helpers.bulk(es_20, actions)

以上這篇python實(shí)現(xiàn)將列表中各個(gè)值快速賦值給多個(gè)變量就是小編分享給大家的全部內(nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。

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