更改元组列表，以使第一个条目与第二个条目相同

Question

I have an example country tuple list:

[("GB", "Great Britain"), ("IR", "Ireland"), ("IC", "Iceland")]

For the sake of my task, I do not need the country code, only the human readable value. However Django accepts tuples in it's choiceField as such. I wrote a simple method to create a new tuple that will just contain the friendly name as both values in the tuples, eg :

[("Great Britain", "Great Britain"), ("Ireland", "Ireland"), ("Iceland", "Iceland")]

But i'm looking to see if there is an easier way to do this in Django or python in comparison to my implementation. Anyone have any ideas?

Method

def change_country_tuples(country_list):
    new_country_list = []
    for country in country_list: 
        new_country_list.append(tuple((country[1], country[1])))
    return new_country_list

Django choice field call

country = fields.ChoiceField(
    label='Choose country',
    choices=[('', 'Select a country')] + change_country_tuples(country_choices),
)

EDIT for clarity, updated code is:

def change_country_tuples(country_list):
    return [(country_name, country_name) for country_code, country_name in country_list]

Answer 1

在python changeCountryTuples中可以在一个内衬中完成，如下所示：

newCountryList = [(country[1],country[1]) for country in country_list]