python - 从元组列表创建字典，输出错误

Question

countries = [('AGO', 'ANGOLA'), ('PRT', 'PORTUGAL')]

countries_dict = {}
countries_new_list = []
for country_code, country in countries:
    print country_code
    countries_dict['country_code'] = country_code
    countries_new_list.append(countries_dict)

print countries_new_list

这段代码会打印出来

AGO
PRT
[{'country_code': 'PRT'}, {'country_code': 'PRT'}]

我期待的是:

AGO
PRT
[{'country_code': 'AGO'}, {'country_code': 'PRT'}]

我在这里错过了什么？

http://codepad.org/nZblGER7

Answer 1

使用列表压缩的Pythonic方式:-

>>> countries = [('AGO', 'ANGOLA'), ('PRT', 'PORTUGAL')]
>>> [{"country_code":i} for i ,j in countries]
[{'country_code': 'AGO'}, {'country_code': 'PRT'}]
>>>