Add Queue

[czgdp1807]

Description of the problem

Currently we use Queue from collections module. We want that this should be implemented in pydatastructs itself, however, without breaking the current code, i.e., the API should be similar to the one of collections module.

API:

1. An empty queue should be constructed by using Queue().

2. New elements should be added to the end by using .append(elem).

3. The elements should be removed from the front using .popleft().

4. The number of elements in the queue should be returned by len i.e, __len__ method should be over-rided in the Queue class.

Example of the problem

References/Other comments

See the code of OneDimensionalSegmentTree in pydatastructs.tree.space_partitioning.trees and BinaryTreeTraversal.breadth_first_search to know more about the API requirements.

Can you please assign this issue to me??also I am new to python so I might take some time.

[czgdp1807]

You can start working on this issue. Take your time for creating a PR for this.

thanks

For data type what are the parameters that we have to consider?