如何在 Python 中的两个词典之间获取多个共享项？

Question

length_word = {'pen':3, 'bird':4, 'computer':8, 'mail':4} 
count_word = {'pen':10, 'bird':50, 'computer':3, 'but':45, 'blackboard': 12, 'mail':12}

intersection = length_word.items() - count_word.items() 
common_words = {intersection}

错误：TypeError: unhashable type: 'set'

我想得到这本词典：

outcome = {'pen':10, 'bird':50, 'computer':3, 'mail':12}

谢谢。

Answer 1

intersection = count_word.keys() & length_word.keys()    

outcome = dict((k, count_word[k]) for k in intersection)

Answer 2

尝试获取交集（常用键）。一个你有公共密钥从 count_words.

访问这些密钥

res = {x: count_word.get(x, 0) for x in set(count_word).intersection(length_word)}

结果：

{'bird': 50, 'pen': 10, 'computer': 3, 'mail': 12}

Answer 3

使用 for 循环检查键是否存在于两个字典中。如果是，则将该键、值对添加到新字典中。

length_word = {'pen':3, 'bird':4, 'computer':8, 'mail':4}
count_word = {'pen':10, 'bird':50, 'computer':3, 'but':45, 'blackboard': 12, 'mail':12}
my_dict = {}

for k, v in count_word.items():
    if k in length_word.keys():
        my_dict[k] = v

print(my_dict)

Answer 4

您应该使用 .keys() 而不是 .items()。这是一个解决方案：

length_word = {'pen':3, 'bird':4, 'computer':8, 'mail':4}
count_word = {'pen':10, 'bird':50, 'computer':3, 'but':45, 'blackboard': 12, 'mail':12}
intersection = count_word.keys() & length_word.keys()    

common_words = {i : count_word[i] for i in intersection}

#Output: 
{'computer': 3, 'pen': 10, 'mail': 12, 'bird': 50}

Answer 5

只是另一个 dict comp:

outcome = {k: v for k, v in count_word.items() if k in length_word}

如何在 Python 中的两个词典之间获取多个共享项？

How can I get multiple shared items between two dictionaries in Python?

python

loops

dictionary

intersection