Question

我目前正在组建一个计划，该计划将获得美国世界系列赛（棒球队）的每一位获胜者，并与他们一起形成2个词典。我选择的代码是遵循目标的参数，（没有关键; 1904年或2015年的价值，因为没有世界系列）我认为我的问题是缺乏对词典的理解，如果你认为我误用了一个函数或值我很感激帮助。随意惩罚，我希望学习。

def main():
    start=1903
    input_file=open('WorldSeriesResults.txt','r')
    winners=input_file.readlines()
    year_dict={}
    count_dict={}

好的所以我已经阅读了文件并创建了词典，年份为year_dict：获胜者和获胜者count_dict：胜利计数。

    for i in range(len(winners)):
        team=winners[i].rstrip("\n")
        year=start+i    
        if year>= 1904:
            year += 1
        if year>= 1994:
            year += 1
        year_dict[str(year)] = team
        if team in count_dict:
            count_dict[team] += 1
        else:
            count_dict[team]=1

好的，所以我创建了一个范围循环来方便字典的处理。文件（现在列表）逐行剥离并连接到相应的年份（1-A，2-B，3-C等），同时根据需要跳过1904和1994。然后使用搜索search函数计算每个团队在列表中出现的次数，然后分别将该数字添加到count_dict。在这一点上，我认为我已经完成了每个词典的完美，我在这两个词上都进行了print，看起来我是对的。

    while True:
        year=int(input("Enter a year between 1903-215 excluding 1904 and 1994: "))#prompt user
        if year == 1904:
            print("There was no winner that year")
        elif year == 1994:
            print("There was no winner that year")
        elif year<1903 or year>2015:
            print("The winner of that year in unkown")
        else:
            winner=year_dict[year]
            wins=count_dict[winner]
            print("The team that won the world series in", year, "was the", winner
            print("The", winner, "won the world series",wins, "times.")
            break

这里我提示用户输入。我希望这是下一个关键。用户提供输入，如果有效，它应该是用于获得答案的密钥，但密钥似乎不起作用。

Answer 1

替换

winner=year_dict[year]

通过

winner=year_dict[str(year)]

因为您使用字符串来填充字典。

Answer 2

你的问题很简单，你的两个词典keys和year_dict都很简单。 count_dict格式为string，因此当您在dict循环中查询while时，需要将其转换回string，如下所示：

while True:
        year=int(input("Enter a year between 1903-215 excluding 1904 and 1994: "))#prompt user
        if year == 1904:
            print("There was no winner that year")
        elif year == 1994:
            print("There was no winner that year")
        elif year<1903 or year>2015:
            print("The winner of that year in unkown")
        else:
            winner=year_dict[str(year)]
            wins=count_dict[str(winner)]
            print("The team that won the world series in", year, "was the", winner
            print("The", winner, "won the world series",wins, "times.")
            break

字典中的键

2 个答案: