從數據“列表”中填充鍵值字典的“列表”

Question

我在python中列出了國家/地區的龐大列表和與每個國家/地區相關的數據。 我需要將數據映射到每個列表。 因此，在進行一些谷歌搜索之后，已開始為此目的在python中使用字典。 也就是說，每個國家/地區的每本詞典都會產生一個詞典列表。 然后，使用大寫，語言和人口等數據（鍵）及其相應的值填充這些詞典。 最終，我應該將它們全部作為numpy數組，因為我需要繪制示例，國家和人口圖。

我只是一個初學者，所以請隨時提出任何更好的方法。 這就是我的開始（將我的字典減少到只有4個），並以某種方式陷入僵局。

#!/usr/bin/python
#
#Dictionary example
#


import numpy as np

if __name__ == '__main__':

    country_names = [ 'Germany', 'Italy', 'Netherlands', 'France'] #list of countries

    capital_list =['Berlin', 'Rome', 'Amsterdam', 'Paris']#list of capitals to be mapped to countries
    population_list= ['3.5','2.1', '0.3', '2.8'] #list of population of induvidual countries, all figures in Million
    language_list=['German','Italian','Dutch','French'] #list of languages to be mapped to countries

    #dict1={"CAPITAL":xxx, "POPULATION":yyy, "LANGUAGE": zzz} ##map these data as key value pairs for each country(where each country is a      dictionary)
    dictionary_list ={ "CAPITAL": i, "POPULATION":i, "LANGUAGE": i for i in country_names}
    #dictionary_list ={ i: [] for i in country_names}

    for i in range(len(country_names)): 
        dictionary_list['CAPITAL'] = capital_list[i]
        dictionary_list['POPULATION'] = population_list[i]
        dictionary_list['LANGUAGE'] = language_list[i]
    print dictionary_list
    #for value in dict.itervalues(): ...

    #for key, value in dict.iteritems():

    #numpy array of dictionary

我的問題是我看不到如何交互地創建字典並用其值迭代地填充鍵。 唯一固定的指標是關鍵（目前只有3個指標是人口，語言和資本）。

Answer 1

您可以使用zip

例如：

country_names = [ 'Germany', 'Italy', 'Netherlands', 'France'] #list of countries
capital_list =['Berlin', 'Rome', 'Amsterdam', 'Paris']#list of capitals to be mapped to countries
population_list= ['3.5','2.1', '0.3', '2.8'] #list of population of induvidual countries, all figures in Million
language_list=['German','Italian','Dutch','French'] #list of languages to be mapped to countries

dictionary_list = [ {"COUNTRY": country, "CAPITAL": capital, "POPULATION":population, "LANGUAGE": lang} for country, capital, population, lang in zip(country_names, capital_list, population_list, language_list)]
print(dictionary_list)

---

要么

keys = ["COUNTRY", "CAPITAL", "POPULATION", "LANGUAGE"]
dictionary_list = [ dict(zip(keys,data)) for data in zip(country_names, capital_list, population_list, language_list)]
print(dictionary_list)

輸出：

[{'CAPITAL': 'Berlin',
  'COUNTRY': 'Germany',
  'LANGUAGE': 'German',
  'POPULATION': '3.5'},
 {'CAPITAL': 'Rome',
  'COUNTRY': 'Italy',
  'LANGUAGE': 'Italian',
  'POPULATION': '2.1'},
 {'CAPITAL': 'Amsterdam',
  'COUNTRY': 'Netherlands',
  'LANGUAGE': 'Dutch',
  'POPULATION': '0.3'},
 {'CAPITAL': 'Paris',
  'COUNTRY': 'France',
  'LANGUAGE': 'French',
  'POPULATION': '2.8'}]

Answer 2

你想要 ：

headers = ['name' , 'capital' , 'language']

arrs = [country_names , population_list, language_list]


dicts = [   { name: arr[x] for name, arr in zip(headers, arrs )} for x in range(len(country_names [0]))]