2.extend(self, iterable, /)
通过从可迭代对象追加元素来扩展列表。（添加的是序列）
3.insert(self, index, object, /)在索引之前插入对象
二、对["cherry", "litchi", "strawberry", "mangosteen", "pomelo", "pineapple", "pitaya", "durian"]进行默认排序1.正序
fruit_list = ["cherry", "litchi", "strawberry", "mangosteen", "pomelo", "pineapple", "pitaya", "durian"] fruit_list.sort() print(fruit_list)2.倒序
fruit_list = ["cherry", "litchi", "strawberry", "mangosteen", "pomelo", "pineapple", "pitaya", "durian"] fruit_list.sort(reverse=True) print(fruit_list)3.根据最后一个字母排序
def sort_func(x):
return x[-1]
fruit_list = ["cherry", "litchi", "strawberry", "mangosteen", "pomelo", "pineapple", "pitaya", "durian"]
fruit_list.sort(key=sort_func)
print(fruit_list)
4.先按第一个字母排序，再按最后一个字母排序
def sort_func(x):
return (x[0], x[-1])
fruit_list = ["cherry", "litchi", "strawberry", "mangosteen", "pomelo", "pineapple", "pitaya", "durian"]
fruit_list.sort(key=sort_func)
print(fruit_list)
三、dict中所有方法的使用
1.clear(self, /)
Remove all items from list.
dict_data = {1: 1, 2: 2}
data = dict_data.clear()
print(dict_data)
2.copy(self, /)
Return a shallow copy of the list.
dict_data = {1: 1, 2: 2}
data = dict_data.copy()
print(dict_data, data)
3.items(...)
D.items() -> a set-like object providing a view on D's items
一个类似集合的对象，提供 D 项的视图
dict_data = {1: 1, 2: 2, 3: 3}
data = dict_data.items()
print(dict_data, data)
4.get(self, key, default=None, /)
Return the value for key if key is in the dictionary, else default.
如果 key 在字典中，则返回 key 的值，否则返回默认值。
dict_data = {1: 1, 2: 2}
data = dict_data.get(1)
print(dict_data, data)
5. keys(...)
D.keys() -> a set-like object providing a view on D's keys
D.keys（） ->一个类似集合的对象，提供 D 键的视图
dict_data = {1: 1, 2: 2}
data = dict_data.keys()
print(dict_data, data)
6.pop(...)
D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
D.pop（k[，d]） -> v，删除指定的键并返回相应的
dict_data = {1: 1, 2: 2, 3: 4}
data = dict_data.pop(3)
print(dict_data, data)
If key is not found, default is returned if given, otherwise KeyError is raised如果未找到 key，则返回 default（如果给定），否则将触发KeyError
dict_data = {1: 1, 2: 2, 3: 4}
data = dict_data.pop(4)
print(dict_data, data)
7.popitem(self, /)Remove and return a (key, value) pair as a 2-tuple.((key, value))
删除（键、值）对并将其作为 2 元组返回。（（键、值））
dict_data = {1: 1, 2: 2, 3: 3}
data = dict_data.popitem()
print(dict_data, data)
Pairs are returned in LIFO (last-in, first-out) order. 成对按后进先出（后进先出）顺序返回。
Raises KeyError if the dict is empty. 如果字典为空则引发keyerror 8.setdefault(self, key, default=None, /)
Insert key with a value of default if key is not in the dictionary.
如果键不在字典中，则插入值为默认值的键。
dict_data = {1: 1, 2: 2, 3: 3}
data = dict_data.setdefault(4)
print(dict_data, data)
Return the value for key if key is in the dictionary, else default.
如果 key 在字典中，则返回 key 的值，否则返回默认值。
dict_data = {1: 1, 2: 2, 3: 3}
data = dict_data.setdefault(2)
print(dict_data, data)
9.update(...)D.update([E, ]**F) -> None. Update D from dict/iterable E and F. D.update（[E， ]**F） -> None.从字典/可迭代 E 和 F 更新 D
dict_data = {1: 1, 2: 2, 3: 3}
dict_data1 = {4: 5, 6: 7, 8: 9}
dict_data.update(dict_data1)
print(dict_data)
If E is present and has a .keys() method, then does: for k in E: D[k] =E[k]
如果 E 存在并且具有 .keys（） 方法，则对于 E 中的 k：D[k] =E[k
If E is present and lacks a .keys() method, then does: for k, v in E:D[k] = v 如果 E 存在并且缺少 .keys（） 方法，则为：对于 k，V 在 E：D[k] = v in either case, this is followed by: for k in F: D[k] = F[k] 在任何一种情况下，这后面跟着：对于F中的k：D[k] = F[k] 10.values(...)
D.values() -> an object providing a view on D's values D.values（） ->一个对象，提供 D 值的视图
dict_data = {1: 1, 2: 2, 3: 3}
data = dict_data.values()
print(dict_data, data)
