python - 转换字典python中的列表列表

Question

我面临以下问题。我有一个从远程 URL 获得的列表列表，代码如下:

import csv
import urllib.request

text_url = 'https://www.emidius.eu/fdsnws/event/1/query?starttime=1899-01-01T00:00:00&endtime=1899-01-31T23:59:59&minmag=4&maxmag=9&orderby=time-asc&limit=100&format=text'

with urllib.request.urlopen(text_url) as response:
   my_text = response.read().decode()

lines = my_text.splitlines()
reader = csv.reader(lines, delimiter='|')

我可以将阅读器转换为列表列表:

my_list = list(reader)

我想做的是将列表列表(或在 reader 本身内)转换为列表字典。第一个列表的项目应该成为字典键，而从第二个到最后一个元素，我想将字典值作为列表获取:

my_list[0] # dict keys
['#EventID',
 'Time',
 'Latitude',
 'Longitude',
 'Depth/km',
 'Author',
 'Catalog',
 'Contributor',
 'ContributorID',
 'MagType',
 'Magnitude',
 'MagAuthor',
 'EventLocationName']

my_list[1:] # dict values as list
[['quakeml:eu.ahead/event/18990105_0245_000',
  '1899-01-05T02:45:--',
  '41.500',
  '13.783',
  '',
  'AHEAD',
  'SHEEC',
  'CPTI04',
  '1309',
  'Mw',
  '4.63',
  'SHEEC',
  'Pignataro'],
 ['quakeml:eu.ahead/event/18990118_2048_000',
  '1899-01-18T20:48:--',
  '46.180',
  '14.500',
  '4.8',
  'AHEAD',
  'SHEEC',
  'RIBA982',
  '',
  'Mw',
  '4.51',
  'SHEEC',
  'Vodice Brnik'],
 ['quakeml:eu.ahead/event/18990122_0956_000',
  '1899-01-22T09:56:--',
  '37.200',
  '21.600',
  '',
  'AHEAD',
  'SHEEC',
  'PAPA003',
  '',
  'Mw',
  '6.50',
  'SHEEC',
  'Kyparissia'],
 ['quakeml:eu.ahead/event/18990131_1112_000',
  '1899-01-31T11:12:--',
  '66.300',
  '-19.900',
  '',
  'AHEAD',
  'SHEEC',
  'AMBSI000',
  '',
  'Mw',
  '5.80',
  'SHEEC',
  '[N. Iceland]'],
 ['quakeml:eu.ahead/event/18990131_2345_000',
  '1899-01-31T23:45:--',
  '60.100',
  '5.500',
  '30',
  'AHEAD',
  'SHEEC',
  'FEN007',
  '',
  'Mw',
  '4.60',
  'SHEEC',
  '[Biornafjorden]']]

基本上输出应该是这样的:

d['#EventID'] = ['quakeml:eu.ahead/event/18990105_0245_000', 'quakeml:eu.ahead/event/18990105_0245_000', 'quakeml:eu.ahead/event/18990105_0245_000']

Answer 1

使用 csv.DictReader 和 dict.setdefault

例如:

import csv

d = {}
reader = csv.DictReader(lines, delimiter='|')
for row in reader:                              #Iterate Each row
    for k, v in row.items():                    #Iterate Key-Value
        d.setdefault(k, []).append(v)