字典在Python中以字符串形式输出

meag_a 发表于 Dev

meag_a

查看以下格式的打印语句，还需要包括输入的所有新国家和人口。我可以使代码以某种dict格式显示附加字典，但很难以以下格式显示。我做错了什么？

预期产量：
   Vatican has Population 800
   Vatican has Population 10200
   ...

def main():
        countryPop = {'Vatican': 800, 'Tuvalu': 10200, 'Nauru': 11000, 'Palau': 17900,
                      'San Marino': 33420, 'Monaco': 38300, 'Marshall Islands': 55500}

        # while loop to repeat the input request and population display until 0 is entered
        while True:
            ctry = input('Enter country:')
            population = countryPop.get(ctry)
            print('Population:',population)
            if ctry == '0':
                break

            # Else if Loop meant to activate if a country unknown to the original dictionary is entered
            elif ctry not in countryPop:
                popIn = input("Country Pop:")
                countryPop[ctry] = popIn

        # printing the new list after breaking from the loop
        for ctry in countryPop:
            print(str(ctry)+" has population "+str(popIn))
    if __name__ == '__main__':
        main()

伊斯梅尔·帕迪利亚（Ismael Padilla）

您可以使用for key in dict语法来迭代字典的键。然后，在循环中，您可以dict[key]用来读取该键中保存的内容。因此，以下方法将起作用：

countryPop = {'Vatican': 800, 'Tuvalu': 10200, 'Nauru': 11000, 'Palau': 17900,
                      'San Marino': 33420, 'Monaco': 38300, 'Marshall Islands': 55500}

for key in countryPop:
    print(key + " has Population " + str(countryPop[key]))

输出：