Pythonic方法用值计数填充字典

Question

如何以更加pythonic的方式编写以下python代码段（使用python2.7）：

typeA = typeB = typeC = 0
    for count in counts:
        if count['storeType'] == 'dataStore':
            typeA = typeA + 1
        elif count['storeType'] == 'coverageStore':
            typeB = typeB + 1
        elif  count['storeType'] == 'remoteStore':
            typeC = typeC + 1

    count_dict = {
        'dataStore': dataStore,
        'coverageStore': coverageStore,
        'remoteStore': remoteStore
    }

Answer 1

您可以使用counter

.kt

行动举例：

from collections import Counter

store_types = [count['storeType']  for count in counts]

print Counter(store_types)

# If you want dict, thought Counter is sub-class of dict. Convert to dict

dict(Counter(store_types))