在文件名中使用下划线比使用任何其他特殊字符更好，因为它被广泛接受因此构造文件名如下:

It is better to use underscore in filename than any other special character since it widely accepted Therefore constructing file name as below :

csv_file = 'myfile_' + str(datetime.now().strftime('%Y_%m_%d_%H_%M_%S')) + '.csv'

使用日期时间如下:

from elasticsearch import Elasticsearch
import csv

es = Elasticsearch(["9200"])

# Replace the following Query with your own Elastic Search Query
res = es.search(index="search", body=
                {
                    "_source": ["DTDT", "TRDT", "SPLE", "RPLE"],
                    "query": {
                        "bool": {
                            "should": [
                                {"wildcard": {"CN": "TEST1"}}

                            ]
                        }
                    }
}, size=10)

from datetime import datetime
import os

file_path = <PASS YOUR FILE HERE>

csv_file = 'myfile_' + str(datetime.now().strftime('%Y_%m_%d_%H_%M_%S')) + '.csv'

csv_file_full = os.path.join(file_path, os.sep, csv_file)

header_names = { 'DTDT': 'DATE', 'TRDT': 'TIME', ...}

with open(csv_file_full, 'w') as f:  # Just use 'w' mode in 3.x
    header_present  = False
    for doc in res['hits']['hits']:
        my_dict = doc['_source']
        if not header_present:
            w = csv.DictWriter(f, my_dict.keys())
            w.writerow(header_names)  # will write DATE, TIME, ... in correct place
            header_present = True


        w.writerow(my_dict)