用Python计算字典列表中的出现次数

我只是想计算python列表中字典列表的出现次数。我想附加 count 基于某种过滤的出现。我看到了一个在django模型中实现这一点的示例。我只是不知道如何以纯粹的Python方式实现这种方法。

类似的方法,但有和,我只需要计数, Count the values in list of dictionaries python

dataset =[
    {
        'Country': 'GB',
        'Pollutant': 'SO2',
        'Pollution': 10,
        'Year': 2016
    },
    {
        'Country': 'AL',
        'Pollutant': 'O3',
        'Pollution': 10,
        'Year': 2015
    },
    {
        'Country': 'BE',
        'Pollutant': 'SO2',
        'Pollution': 5,
        'Year': 2016
    },
    {
        'Country': 'GB',
        'Pollutant': 'SO2',
        'Pollution': 10,
        'Year': 2016
    },
    
    {
        'Country': 'BE',
        'Pollutant': 'SO2',
        'Pollution': 10,
        'Year': 2016
    },
]

all_Years = sorted(set([v['Year'] for v in dataset]))
all_countries = sorted(set([v['Country'] for v in dataset]))
print(all_Years)
print(all_countries)

for country in all_countries:

    new_data = {
    'years': all_Years,
    'country': country,
    'data' : []
    }

   for year in all_Years:

    #some sort of filter function to apply like in django models
      f = Q(year = year, country=country)

    #apply that filltering
      country_count = dataset.filter(f).count()
      new_data['data'].append(country_count if country_count else 0)


#expected output
#new_data = 
[{'years': [2015,2016], 'country': 'AL', 'data': [1, 0]},
{'years': [2015,2016], 'country': 'BE', 'data': [1, 2]},
{'years': [2015,2016], 'country': 'GB', 'data': [0, 2]}]