python - 将值添加到字典中，int 不可迭代

Question

我试图向字典添加新值或增加该值(取决于是否找到该键)，但遇到一条错误消息:

Traceback (most recent call last): File "C:/Users/james/Desktop/names.py", line 30, in scores(boys) File "C:/Users/james/Desktop/names.py", line 14, in scores totals.update(map(score,1)) TypeError: 'int' object is not iterable

引发问题的行是:

totals.update(map(score,1))

完整代码是:

import csv
def scores(names):
    totals = {}
    values = {"a": 1, "b": 3, "c": 3, "d": 2, "e": 1, "f": 4, "g": 2, "h": 4, "i":1, "j": 8, "k": 5, "l": 1, "m": 3, "n": 1, "o": 1, "p": 3, "q": 10, "r": 1, "s": 1, "t": 1, "u": 1, "v":4, "w": 4, "x": 8, "y": 4, "z": 10}
    score = 0
    for name in names:
        for letter in name:
            letter = letter.lower()
            if (letter in values):
                score = score + int(values.get(letter))
        if (score in totals):
            totals.update(map(score,score.get(score)+1))
            #presumably this would throw an error
        else:
            totals.update(map(score,1))
            #this is the line throwing the error
        score = 0
    print (totals)    

boys = set()
girls = set()
with open ("names.txt") as file:
    reader = csv.reader(file, delimiter=' ', quotechar='|')
    for row in reader:
        row = row[0].split(",")
        if (row[0]=="B"):
            boys.add(row[1])
        else:
            girls.add(row[1])
print (len(boys))
print (len(girls))
scores(boys)
scores(girls)

就上下文而言，我有大量 1974-2016 年苏格兰 child 姓名的 csv，存储为 names.txt，我正在尝试获取他们的不同拼字游戏分数的频率。我看过this question以及从中链接的答案，但据我所知，我实际上并没有尝试迭代 score

Answer 1

这个 block 无法工作，因为 map 将一个 iterable 作为第二个参数(这里根本不需要 map， map 将函数应用于可迭代的所有元素)

    if (score in totals):
        totals.update(map(score,score.get(score)+1))
    else:
        totals.update(map(score,1))

在你完全伪造的代码后面(不得不说:))，你想计算达到给定分数的次数，所以你需要:

import collections
totals = collections.Counter()

然后简单地:

totals[score] += 1