Improved examples

README.md

@@ -4,9 +4,9 @@ PyDataStructs
 [![Build Status](https://travis-ci.org/codezonediitj/pydatastructs.png?branch=master)](https://travis-ci.org/codezonediitj/pydatastructs) [![Join the chat at https://gitter.im/codezonediitj/pydatastructs](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/codezoned2017/Lobby) [![Discuss at pydatastructs@googlegroups.com](https://img.shields.io/badge/discuss-pydatastructs%40googlegroups.com-blue.svg)](https://groups.google.com/forum/#!forum/pydatastructs) [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](https://github.com/codezonediitj/pydatastructs/pulls) [![codecov](https://codecov.io/gh/codezonediitj/pydatastructs/branch/master/graph/badge.svg)](https://codecov.io/gh/codezonediitj/pydatastructs)
 
 About
------------
+-----
 
-Currently, the aim of the project is to be a Python package for various data structures in computer science. In addition, we are also working on including parallel algorithms. To the best of our knowledge a well designed library/package which has covered most of the data structures and algorithms including their parallel implementation doesn't exist. 
+Currently, the project aims to be a Python package for various data structures in computer science. Besides, we are also working on including parallel algorithms. To the best of our knowledge, a well-designed library/package which has covered most of the data structures and algorithms including their parallel implementation doesn't exist. 
 
 In future, i.e, after a few releases of the package when the software design will become stable, we also aim to provide APIs for the code in C++ and Java as well.
 
@@ -19,7 +19,7 @@ You can install the library by running the following command,
 python3 setup.py install
 ```
 
-For development purposes you can use the option `develop` as shown below,
+For development purposes, you can use the option `develop` as shown below,
 
 ```python
 python3 setup.py develop
@@ -57,7 +57,7 @@ Follow the steps given below,
 8. Execute, `git add .`.
 9. Execute, `git commit -m "your-commit-message"`.
 10. Execute, `git push origin_user <your-current-branch>`.
-11. Make a PR.
+11. Make PR.
 
 That's it, 10 easy steps for your first contribution. For future contributions just follow steps 5 to 10. Make sure that before starting work, always checkout to master and pull the recent changes using the remote `origin` and then start following steps 5 to 10.
 
@@ -66,7 +66,7 @@ See you soon with your first PR.
 Guidelines
 ----------
 
-We recommend you to introduce yourself on our [gitter channel](https://gitter.im/codezoned2017/Lobby). You can include the courses you have taken relevant to data structures and algorithms, some projects, prior experience, in your introduction. This will help us to allocate you issues of suitable difficulty.
+We recommend you to introduce yourself on our [gitter channel](https://gitter.im/codezoned2017/Lobby). You can include the courses you have taken relevant to data structures and algorithms, some projects, prior experience, in your introduction. This will help us to allocate your issues of suitable difficulty.
 
 Please follow the rules and guidelines given below,
 
@@ -79,6 +79,6 @@ The following parameters are to be followed to pass the code quality tests for y
 1. There should not be any trailing white spaces at any line of code.
 2. Each `.py` file should end with exactly one new line.
 3. Comparisons involving `True`, `False` and `None` should be done by
-reference(using `is`, `is not`) and not by value(`==`, `!=`).
+reference (using `is`, `is not`) and not by value(`==`, `!=`).
 
 Keep contributing!!

pydatastructs/linear_data_structures/linked_lists.py

@@ -49,13 +49,13 @@ class DoublyLinkedList(LinkedList):
     6
     >>> dll.append(5)
     >>> dll.append_left(2)
-    >>> print(dll)
-    [2, 6, 5]
+    >>> str(dll)
+    '[2, 6, 5]'
     >>> dll[0].data = 7.2
     >>> dll.extract(1).data
     6
-    >>> print(dll)
-    [7.2, 5]
+    >>> str(dll)
+    '[7.2, 5]'
 
     References
     ==========
@@ -306,13 +306,13 @@ class SinglyLinkedList(LinkedList):
     6
     >>> sll.append(5)
     >>> sll.append_left(2)
-    >>> print(sll)
-    [2, 6, 5]
+    >>> str(sll)
+    '[2, 6, 5]'
     >>> sll[0].data = 7.2
     >>> sll.extract(1).data
     6
-    >>> print(sll)
-    [7.2, 5]
+    >>> str(sll)
+    '[7.2, 5]'
 
     References
     ==========
@@ -530,13 +530,13 @@ class SinglyCircularLinkedList(SinglyLinkedList):
     6
     >>> scll.append(5)
     >>> scll.append_left(2)
-    >>> print(scll)
-    [2, 6, 5]
+    >>> str(scll)
+    '[2, 6, 5]'
     >>> scll[0].data = 7.2
     >>> scll.extract(1).data
     6
-    >>> print(scll)
-    [7.2, 5]
+    >>> str(scll)
+    '[7.2, 5]'
 
     References
     ==========
@@ -624,13 +624,13 @@ class DoublyCircularLinkedList(DoublyLinkedList):
     6
     >>> dcll.append(5)
     >>> dcll.append_left(2)
-    >>> print(dcll)
-    [2, 6, 5]
+    >>> str(dcll)
+    '[2, 6, 5]'
     >>> dcll[0].data = 7.2
     >>> dcll.extract(1).data
     6
-    >>> print(dcll)
-    [7.2, 5]
+    >>> str(dcll)
+    '[7.2, 5]'
 
     References
     ==========