Python–展平并移除字典中的键
给定一个字典，执行某些字典键的展平和移除。
输入 : test_dict = {'a': 14、' b': 16、' c': {'d': {'e': 7}}，rem _ keys =[“c”、“a”、“d”] 输出 : {'b': 16、' e': 7} 解释:所有“c”、“a”和“d”均已删除。 输入 : test_dict = {'a': 14、' b': 16、' c': {'d': {'e': 7}}，rem _ keys =[“c”、“d”、“e”] 输出 : {'a': 14、' b': 16} 说明:所有“c”、“e”和“d”均已删除。
方法:使用递归+ isinstance() +循环
上述功能的组合可以用来解决这个问题。在这种情况下，我们使用 isinstance()检查字典作为嵌套字典的实例，并在每次内部字典中重复出现。循环用于迭代键。
Python 3
# Python3 code to demonstrate working of
# Flatten and remove keys from Dictionary
# Using loop + recursion + isinstance()
# function to compute removal and flattening
def hlper_fnc(test_dict, rem_keys):
if not isinstance(test_dict, dict):
return test_dict
res = {}
for key, val in test_dict.items():
rem = hlper_fnc(val, rem_keys)
# performing removal
if key not in rem_keys:
res[key] = rem
else:
if isinstance(rem, dict):
res.update(rem)
return res
# initializing dictionary
test_dict = {'a': 14, 'b': 16, 'c': {'d': {'e': 7}}}
# printing original dictionary
print("The original dictionary is : " + str(test_dict))
# initializing removal keys
rem_keys = ["c", "d"]
# calling helper function for task
res = hlper_fnc(test_dict, rem_keys)
# printing result
print("The removed and flattened dictionary : " + str(res))
OutputThe original dictionary is : {‘a’: 14, ‘b’: 16, ‘c’: {‘d’: {‘e’: 7}}} The removed and flattened dictionary : {‘a’: 14, ‘b’: 16, ‘e’: 7}
版权属于：月萌API www.moonapi.com，转载请注明出处
