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An array ofarray

Array is more efficient than list if you need a list that contains only numbers, because arrays don’t store numeric objects (like float) behind them, but rather machine translations of numbers, called byte representations. This is just like arrays in C.

Arrays support all operations related to mutable sequences, including.pop,.insert, and.extend. In addition, arrays provide faster ways to read and store files from files, such as.frombytes and.tofile.

Array. The first argument to array specifies the data type of the array element. Python will not allow you to store data in an array other than the specified type.

The queuedeque

The Collections. deque class (two-way queue) is a thread-safe data type that can quickly add or remove elements from both ends (append and Popleft are atomic operations).

A deque is also a good choice if you want to have a data type to hold “the most recently used elements.” This is because when creating a new two-way queue, you can specify the size of the queue, and if the queue is full, you can remove the expired elements from the reverse end and add new elements at the end.

Methods to compare

methods The list of tuples An array of The bidirectional queue instructions
s__add__(s2) There are There are There are s + s2, joining together
s__iadd__(s2) There are There are There are s += s2, local splicing
s.append(e) There are There are There are Add a new element to the tail
s.appendleft(e) There are Add a new element to the tail
s.clear() There are There are Delete all elements
s.__contains__(e) There are There are There are sDoes it includee
s.copy() There are A shallow copy
s.__copy__() There are There are rightcopy.copyThe support of
s.__deepcopy__() There are rightcopy.deepcopyThe support of
s.count(e) There are There are There are There are e 在 sFrequency of occurrence in
s.__delitem__(p) There are There are There are Delete thepThe elements of the
s.extend(it) There are There are There are Put the iterableitAppended to thesThe tail
s.extendleft(it) There are Put the iterableitAppended to thesThe head
s.__getitem__(p) There are There are There are There are To get inpThe elements of the
s.__getnewargs__() There are inpickleSupport for more optimized serialization in
s.index(e) There are There are There are finds 中 eThe location of the first appearance
s.insert(p, e) There are There are In the positionpInsert elements beforee
s.__iter__() There are There are There are There are To obtainsThe iterator
s.__len__() There are There are There are There are len(s)Number of elements
s.__mul__(n) There are There are There are s * n, repeated splicing
s.__imul__(n) There are There are s *= nAnd local repeated splicing
s.__rmul__(n) There are There are There are n * s, reverse stitching
s.pop([p]) There are There are Yes (no parameter) Delete last/locatedpElement and return its value
s.popleft() There are Removes the uppermost element and returns its value
s.remove(e) There are There are There are deletesFor the first timee
s.reverse() There are There are There are On the reverse
s.__reversed__() There are There are There are Returns an inverse-order iterator
s.rotate(n) There are There are thenTen elements are moved from one end of the queue to the other
s.__setitem__(p, e) There are There are There are The position ofpReplace it with elementse
s.sort([key], [reverse]) There are The sorting
s.byteswap There are Reverses the byte sequence of each element in the array
s.frombytes(b) There are Read the byte sequence compressed into machine values and add it to the tail
s.fromfile(f,n) There are Binary filesfContains machine values read out and added to the tail, at mostn 项
s.fromlist(l) There are Add the elements in the list to the end if any of them causeTypeErrorException, then all additions are cancelled
s.tobytes() There are Use the machine values of all elementsbytesObject
s.tofile(f) There are Writes all elements to a file as machine values
s.tolist() There are Convert an array to a list of elements of type number objects
s.typecode There are Returns a one-character string representing the type of array elements in C