('1', '2') <class 'tuple'>
(49, 50，51) <class 'tuple'>
(1, 2) <class 'tuple'>

['1', '2'] <class 'list'>
[49，50，51] <class 'list'>
[1, 2] <class 'list'>

count(self, value, /)
      Return number of occurrences of value.
      #统计出现的次数
 index(self, value, start=0, stop=9223372036854775807, /)
      Return first index of value.
     #返回第一个的索引（索引：从0开始）

tuple_data = tuple("hello")
print(tuple_data.count("l"))
print(tuple_data.index("l"))

def append(self, *args, **kwargs):
    """ Append object to the end of the list. """
    # 将对象追加到列表的末尾。
def clear(self, *args, **kwargs):
    """ Remove all items from list. """
    # 从列表中删除所有项目。
def copy(self, *args, **kwargs):
    """ Return a shallow copy of the list. """
    # 返回列表的浅层副本。
def count(self, *args, **kwargs):
    """ Return number of occurrences of value. """
    # 返回值的出现次数。
def extend(self, *args, **kwargs):
    """ Extend list by appending elements from the iterable. """
    # 通过从可迭代对象追加元素来扩展列表。
def index(self, *args, **kwargs):
    """
    Return first index of value.
    # 返回值的第一个索引。
    Raises ValueError if the value is not present.
    """
    # 如果值不存在，则提高值错误。
def insert(self, *args, **kwargs):
    """ Insert object before index. """
    # 在索引之前插入对象。
def pop(self, *args, **kwargs):
    """
    Remove and return item at index (default last).
    # 删除并返回索引处的项目（默认在后面）。
    Raises IndexError if list is empty or index is out of range.
    """
    # 如果列表为空或索引超出范围，则引发索引错误。
def remove(self, *args, **kwargs):
    """
    Remove first occurrence of value.
    # 删除第一个出现的值。
    Raises ValueError if the value is not present.
    """
    # 如果值不存在，则提高值错误。
def reverse(self, *args, **kwargs):
    """ Reverse *IN PLACE*. """
    # 反向
def sort(self, *args, **kwargs):
    """
    Sort the list in ascending order and return None.
    # 按升序对列表进行排序，并返回 None。
    The sort is in-place (i.e. the list itself is modified) and stable (i.e. the
    order of two equal elements is maintained).
    # 排序是就地的（即列表本身被修改）和稳定的（即保持两个相等元素的顺序）。
    If a key function is given, apply it once to each list item and sort them,
    ascending or descending, according to their function values.
    # 如果给出了一个关键功能，则将其应用于每个列表项一次并对其进行排序，
       升序或降序，根据其函数值。
    The reverse flag can be set to sort in descending order.