py-fds 3.4.2

Simple implementation of data structures for python

pyfds

Simple implementaion of data structures (DS) for python

Content

• linked list
• doubly linked list
• sorted linked list
• stack
• queue
• priority queue
• binary search tree

• utils // (package)

Content of utils

• node // single pointer node
• dnode // double pointer node
• tnode // tree pointer node
• pair

how to import utils

from pyfds.utils import *
pair = Pair()
or
import pyfds.utils
pair = utils.Pair()

Classes

• List // linked list
• DList // doubly linked list
• SList // sorted linked list
• Stack // stack
• Queue // queue
• PQueue // priority queue
• BST // binary search tree

API

List

Properties

• first // TODO: return the data in the first node
• last // TODO: return the data in the last node

Methodes

• insert(data, pos) // TODO: add node in the entered position (pos=0 => add in the begining) // the default value is set to 0
• append(data) // TODO: add node in the end
• delete(data) // TODO: delete all nodes hav the entered data
• remove(pos=0) // TODO: return and remove node in the entered position (pos=0 => remove first node, pos=-1 => remove last node)

DList

Properties

• first // TODO: return the data in the first node
• last // TODO: return the data in the last node

Methodes

• add_begin(data) // TODO: add a node to the begin
• add_fin(data) // TODO: add a node to the fin
• delete(data) // TODO: delete all nodes hav the entered data
• remove(pos) // TODO: return and remove node in the entered position (pos=0 => remove first node, pos=-1 => remove last node) // the default value is set to 0

SList

Properties

• first // TODO: return the data in the first node
• last // TODO: return the data in the last node

Methodes

• append(data) // TODO: add a node to the list in a sorted way
• delete(data) // TODO: delete all nodes hav the entered data
• remove(pos) // TODO: return and remove node in the entered position (pos=0 => remove first node, pos=-1 => remove last node) // the default value is set to 0

Note

• the (reverse, sort, exchange) are not supported in this DS because they brake the rule of the Sorted Linked List

Stack

Properties

• top // TODO: return the data in the first node

Methodes

• push(data) // TODO: add a node to the top
• pop() // TODO: return and remove the node in the top

Queue

Properties

• front // TODO: return the data in the first node
• back // TODO: return the data in the last node

Methods

• enqueue(data) // TODO: add a node to the end
• dequeue() // TODO: return and remove the first element

PQueue

Properties

• front // TODO: return the data in the first node
• back // TODO: return the data in the last node

Methods

• enqueue(data) // TODO: add a node to the queue in a sorted way
• dequeue() // TODO: return and remove the first element

Methods for all DSs

• str() // USE: print([DS_name]) // TODO: display the DS
• len() // USE: len([DS_name]) // TODO: return the lenth of the DS
• empty() // TODO: return True if the DS is empty
• clear() // TODO: clear the DS
• find(data) // TODO: return the number of how many the entered data found in the DS
• reverse() // TODO: return the reverse of the DS
• sort() // TODO: sort the DS if its not sorted
• exchange(n) // TODO: circular permutation for n time

classmethods for all DSs

// USE: [DS] = [DS_type].method([DS1], [DS2])
// Examples:
stck3 = Stack.merge(stck1, stck2)
Stack.swap([DS1], [DS2])
the tow DS parameters must be from the same DS

• merge(DS1, DS2) // TODO: return the merge of two DS in new DS
• swap(DS1, DS2) // TODO: swap between DS1 and DS2 (DS1 will be DS2 and DS2 will be DS1)

BST

properties

• pre_order // TODO: represent the BST in pre_order way
• in_order // TODO: represent the BST in in_order way
• post_order // TODO: represent the BST in post_order way
• number_of_nodes // TODO: return the number of nodes in the BST
• number_of_liefs // TODO: return the number of liefs (nodes without any children) in the BST
• height // TODO: return the height of the BST
• max // TODO: return the maximum value in the BST
• min // TODO: return the minimum value in the BST

methodes

• append(data) // TODO: append a new node to the BST if not exist
• find(data) // TODO: search for an element in the BST and return it if exist
• parent(data) // TODO: return the parent node of an element if exist
• successor(data) // TODO: return the next value in the BST if exist
• predecessor(data) // TODO: return the previous value in the BST if exist
• delete(data) // TODO: delete an element from the BST if exist

classmethodes

• equals(bst1, bst2) // TODO: return True if bst1 is equal to bst2 (bst1 is the same as bst2)