That’s great, however, in Python 3, keys() no longer returns a list, but a view object:The objects returned by dict.keys(), dict.values() and dict.items() are view objects. They provide a dynamic view on the dictionary’s entries, which means that when the dictionary changes, the...
TheTypeErrorcan be avoided and compatibility can be maintained by simply converting thedict_keysobject into a list which can then be indexed as normal in both Python 2 and Python 3: $ python3 >>> foo = { 'bar': "hello", 'baz': "world" } >>> type(list(foo.keys())) <class 'li...
## Note that the keys are in a random order. for key in dict: print key ## prints a g o ## Exactly the same as above for key in dict.keys(): print key ## Get the .keys() list: print dict.keys() ## ['a', 'o', 'g'] ## Likewise, there's a .values() list of va...
dict_keys(['c', 'b', 'a']) 8.values 返回一个包含字典所有value的列表 1 2 3 >>> d = {'a':1,'b':2,'c':3} >>> d.values() dict_values([3, 2, 1]) 9.items 返回一个包含所有(键,值)元祖的列表 1 2 3 >>> d = {'a':1,'b':2,'c':3} >>> d.items() dict_it...
# 键和值示例my_dict={'a':1,'b':2,'c':3}# 获取所有键keys=my_dict.keys()print(keys)# 输出: dict_keys(['a', 'b', 'c'])# 获取所有值values=my_dict.values()print(values)# 输出: dict_values([1, 2, 3])# 获取所有键值对items=my_dict.items()print(items)# 输出: dict_items...
Thekeys()method extracts the keys of thedictionaryand returns thelistof keys as a view object. Example numbers = {1:'one',2:'two',3:'three'} # extracts the keys of the dictionarydictionaryKeys = numbers.keys() print(dictionaryKeys)# Output: dict_keys([1, 2, 3]) ...
dict6 = dict.fromkeys(seq, ('小马','8','男')) print("新的字典为 : %s"% str(dict6)) # 新的字典为 : {'name': ('小马', '8', '男'), 'age': ('小马', '8', '男'), 'sex': ('小马', '8', '男')} dict.keys返回一个可迭代对象,可以使用 list 来转换为列表。
def get_keys(d, value): return [k for k,v in d.items() if v == value] 函数中,d 是字典。 在字典中修改或添加元素 在字典中,可以修改已有 key 对应的 value 值,或者添加新的 key-value 键值对数据,如下: my_dict8 = {'name': 'John', 'age': 25 , 1: [2, 4, 3]} # 修改已有...
dict_[key_list[-1]] = value_ get_val() 其中 key_list 是您的案例的结果,string.slit('.')并且dict_是x字典。您可以省略copy.deepcopy()部分,这只是像我这样偏执的窥视者 - 原因是 python dict 不是不可变的,因此处理deepcopy(内存中单独但精确的副本)是一种解决方案。 set_val()正如我所说,这不...
Example Get a list of the keys: x = thisdict.keys() Try it Yourself » The list of the keys is a view of the dictionary, meaning that any changes done to the dictionary will be reflected in the keys list.Example Add a new item to the original dictionary, and see that the keys...