如果我有字典,该如何获取密钥,并允许用户使用每个密钥的不同值制作无限的版本?
my_keys = ["Hello", "World"]
my_values1 = ["Why", "that"]
my_dict1 = dict(zip(my_keys, my_values1))
my_dict2 = dict.fromkeys(my_dict1.keys())
Variant 1 allows simple construction of any dict from both: a list of keys and values, while my_dict2 presents a varaint to create an "empty" (all values are None
dict from an existing. You can also mix both (I leave that as an exercise;-).
You can use the dict.fromkeys()
method:
def copy_keys(your_dict=None):
if your_dict != None:
return dict.fromkeys(your_dict.keys())
else:
return dict()
blah = dict((('blah',1),('haha',2)))
>>>blah
{'blah': 1, 'haha': 2}
>>> copy_keys(blah)
{'blah': None, 'haha': None}
My example function initalizes the values as None
but you can easily adapt it to insert your own values by passing the value
parameter to the .fromkeys(seq[,value])
method.
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