30秒学会 Python 片段 – find_keys

Returns all keys in the provided dictionary that have the given value.

Use dictionary.items(), a generator and list() to return all keys that have a value equal to val.

代码实现

def find_keys(dict, val):
  return list(key for key, value in dict.items() if value == val)

使用样例

ages = {
  "Peter": 10,
  "Isabel": 11,
  "Anna": 10,
}
find_keys(ages, 10) # [ "Peter", "Anna" ]