class list(object)
 |  list() -> new empty list  #创建一个新的空列表
 |  list(iterable) -> new list initialized from iterable's items  #迭代变量初始化新列表
 |
 |  Methods defined here:
 | |  __add__(self, value, /)
 |      Return self+value.
 |
 |  __contains__(self, key, /)
 |      Return key in self.
 |
 |  __delitem__(self, key, /)
 |      Delete self[key].
 |
 |  __eq__(self, value, /)
 |      Return self==value.
 |
 |  __ge__(self, value, /)
 |      Return self>=value.
 |
 |  __getattribute__(self, name, /)
 |      Return getattr(self, name).
 |
 |  __getitem__(...)
 |      x.__getitem__(y) <==> x[y]
 |
 |  __gt__(self, value, /)
 |      Return self>value.
 |
 |  __iadd__(self, value, /)
 |      Implement self+=value.
 |
 |  __imul__(self, value, /)
 |      Implement self*=value.
 |
 |  __init__(self, /, *args, **kwargs)
 |      Initialize self.  See help(type(self)) for accurate signature.
 |
 |  __iter__(self, /)
 |      Implement iter(self).
 |
 |  __le__(self, value, /)
 |      Return self<=value.
 |
 |  __len__(self, /)
 |      Return len(self).
 |
 |  __lt__(self, value, /)
 |      Return self<value.
 |
 |  __mul__(self, value, /)
 |      Return self*value.n
 |
 |  __ne__(self, value, /)
 |      Return self!=value.
 |
 |  __new__(*args, **kwargs) from builtins.type
 |      Create and return a new object.  See help(type) for accurate signature.
 |
 |  __repr__(self, /)
 |      Return repr(self).
 |
 |  __reversed__(...)
 |      L.__reversed__() -- return a reverse iterator over the list
 |
 |  __rmul__(self, value, /)
 |      Return self*value.
 |
 |  __setitem__(self, key, value, /)
 |      Set self[key] to value.
 |
 |  __sizeof__(...)
 |      L.__sizeof__() -- size of L in memory, in bytes
 |
 |  append(...) #增加一个元素到list最后
 |      L.append(object) -> None -- append object to end
 |
 |  clear(...) #清空列表
 |      L.clear() -> None -- remove all items from L
 |
 |  copy(...) 
 |      L.copy() -> list -- a shallow copy of L
 |
 |  count(...) #统计list中元素个数
 |      L.count(value) -> integer -- return number of occurrences of value
 |
 |  extend(...) 
 |      L.extend(iterable) -> None -- extend list by appending elements from the iterable
 |
 |  index(...)  #查找list中某个元素的下标值，并返回下标值
 |      L.index(value, [start, [stop]]) -> integer -- return first index of value.
 |      Raises ValueError if the value is not present.
 |
 |  insert(...)  #在index下标位置，插入元素object
 |      L.insert(index, object) -- insert object before index
 |
 |  pop(...) #弹出列表中元素，默认弹出最后一位，index表示元素下标
 |      L.pop([index]) -> item -- remove and return item at index (default last).
 |      Raises IndexError if list is empty or index is out of range.
 |
 |  remove(...)  #移除列表中的元素
 |      L.remove(value) -> None -- remove first occurrence of value.
 |      Raises ValueError if the value is not present.
 |
 |  reverse(...) #倒序排列列表中的元素
 |      L.reverse() -- reverse *IN PLACE*
 |
 |  sort(...)  #排序
 |      L.sort(key=None, reverse=False) -> None -- stable sort *IN PLACE*
 |

>>> a
[]
>>> a.append(1)
>>> a
[1]
>>> a.__add__
<method-wrapper '__add__' of list object at 0x01780968>
>>> a.__add__(2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can only concatenate list (not "int") to list
>>> b = [2]
>>> a.__add__(b)
[1, 2]
>>> a.__repr__()
'[1]'
>>> a.append(2)
>>> a
[1, 2]
>>> a.reserve()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'list' object has no attribute 'reserve'
>>> a.reverse()
>>> a
[2, 1]
>>> a.reverse()
>>> a
[1, 2]
>>> a = list(range(10))
>>> a
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> a.remove()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: remove() takes exactly one argument (0 given)
>>> a.remove(2)
>>> a
[0, 1, 3, 4, 5, 6, 7, 8, 9]
>>> b =a.pop()
>>> b
9
>>> b =a.pop()
>>> b
8
>>> a
[0, 1, 3, 4, 5, 6, 7]
>>> b =a.pop(5)
>>> b
6
>>> a
[0, 1, 3, 4, 5, 7]
>>> b =a.pop(0)
>>> a
[1, 3, 4, 5, 7]
>>> b =a.pop(0)
>>> b
1
>>> a.insert(3,22)
>>> a
[3, 4, 5, 22, 7]
>>> a.index(5)
2
>>> a
[3, 4, 5, 22, 7]
>>> a.index(2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: 2 is not in list