1#对字典进行循环2data={"name":"lisi","age":20,"work":"测试开发工程师"}3forkey,valueindata.items():4print(key,":",value) #需求:key=="age"并且value==20输出我今年20岁了data={"name":"lisi","age":20,"work":"测试开发工程师"}forkey,valueindata.items():ifkey=="age"andvalue==...
2. python 两个列表分别组成字典的键和值 (python two list serve as key and value for dictionary) 3. python 把字典所有的键值组合到一个列表中 (python get dictionary values to combine a list) 4. python 使用一行代码打印字典键值对 (python print dictionary key-value pairs with one line of code)...
# dict.fromkeys(seq[, value])seq = ('name', 'age', 'class')# 不指定值dict = dict.fromkeys(seq)print("新的字典为 : %s" % str(dict))# 赋值 10dict = dict.fromkeys(seq, 10)print("新的字典为 : %s" % str(dict))# 赋值一个元组dict = dict.fromkeys(seq,('zs',8,'Two'))prin...
我们通过一对“{}”来创建字典,字典内的每个元素的键和值是通过“:”来分隔的,也就是key:value格式。字典中的键可以为任意不可变的数据类型(故列表不可以当字典的key),而value则不限制类型。 ①使用“=”将一个字典赋值给一个变量 >>>a_dict={'a':1,'b':2,'c':3} >>>a_dict {'a': 1, 'b'...
在Python中，字典（Dictionary）是一种无序、可变且可迭代的数据类型，它存储了键值对（key-value pairs...
2 is {result}") else: print("Value not found in the dictionary.")get_key_from_value函数...
If you wanted to sort a dictionary in-place, then you’d have to use the del keyword to delete an item from the dictionary and then add it again. Deleting and then adding again effectively moves the key-value pair to the end. The OrderedDict class has a specific method to move an ite...
print("%s: %s" % (key, color_dict[key])) Output: >>> black: #000000 green: #008000 red: #FF0000 white: #FFFFFF >>> Find the maximum and minimum value of a Python dictionary Code: my_dict = {'x':500, 'y':5874, 'z': 560} ...
print(merged_dict['c']) # prints 5 # add a new key-value pair to the merged dictionary merged_dict['e'] = 6 # updates dict1 print(merged_dict['e']) # prints 6 输出 1 3 5 6 使用ChainMap合并字典是一种简洁高效的方法，并且允许您轻松地更新和修改合并后的字典。6. 使用dict构造函数 ...
(self, item): key, value = item if key in self.data: self.data.move_to_end(key) self.data[key] = value def dequeue(self): try: return self.data.popitem(last=False) except KeyError: print("Empty queue") def __len__(self): return len(self.data) def __repr__(self): return ...