{"id":145792,"date":"2025-07-11T12:58:54","date_gmt":"2025-07-11T07:28:54","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=145792"},"modified":"2025-07-11T12:58:54","modified_gmt":"2025-07-11T07:28:54","slug":"family-tree-builder-in-dsa-python","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/family-tree-builder-in-dsa-python\/","title":{"rendered":"DSA Python Project &#8211; Family Tree Builder"},"content":{"rendered":"<h3>Program 1<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">#  Project: Family Tree Builder (Based on BT and Linked list)\r\n\r\n# Objective:\r\n# To create a basic system that allows users to build, manage, and \r\n# explore a family tree structure, where each person can have parent-child \r\n# relationships.\r\n# Tree Data Structure: Each node represents a person. Nodes can have a parent and \r\n# multiple children.\r\n# Dynamic Memory Allocation: For creating new family members at runtime.\r\n# Recursion: For displaying the tree or searching through it.\r\n\r\n# Key Features:\r\n# 1. Add a New Family Member(person)\r\n# 2. Set Parents \r\n# 2. Display the Entire Family Tree\r\n# 3.Search for a Member\r\n# 4.Show Ancestors\r\n# 5. Exit\r\n\r\n\r\nclass Person:                             # Node\r\n    def __init__(self, name):\r\n        self.name = name   # Name of person\r\n        self.father = None   # address of Fatehers Node \r\n        self.mother = None   # address of Mothers Node \r\n        self.next = None  # for linked list\r\n\r\n\r\nclass FamilyTree:\r\n    def __init__(self):\r\n        self.head = None\r\n\r\n    def find_person(self, name): \r\n        temp = self.head\r\n        while temp!=None:\r\n            if temp.name.lower() == name.lower():\r\n                return temp\r\n            temp = temp.next\r\n        return None\r\n\r\n    def add_person(self, name):   \r\n        if self.find_person(name): \r\n            print(\"Person already exists.\")\r\n            return\r\n\r\n        new_person = Person(name)   # Create Node  \r\n        if self.head==None:\r\n            self.head = new_person\r\n        else:\r\n            temp = self.head\r\n            while temp.next!=None:\r\n                temp = temp.next\r\n            temp.next = new_person\r\n        print(\"Person added successfully.\")\r\n                                    #Sonu             Deepak       Mamta\r\n    def set_parents(self, child_name, father_name, mother_name): \r\n        child = self.find_person(child_name)  \r\n        if not child:\r\n            print(\"Child not found. Please add the person first.\")\r\n            return\r\n\r\n        father = self.find_person(father_name) \r\n        if not father:\r\n            print(\"Father not found. Please add the person first.\")\r\n            return\r\n\r\n        mother = self.find_person(mother_name) \r\n        if not mother:\r\n            print(\"Mother not found. Please add the person first.\")\r\n            return\r\n\r\n        child.father = father\r\n        child.mother = mother\r\n        print(\"Parents set successfully for: \",child_name)\r\n\r\n    def display_tree(self):\r\n        if self.head==None:\r\n            print(\"No family members found.\")\r\n            return\r\n\r\n        temp = self.head\r\n        while temp!=None:\r\n            print(f\"\\n Name: {temp.name}\")\r\n            if temp.father!=None:\r\n                print(f\"    Father: {temp.father.name}\")\r\n            if temp.mother!=None:\r\n                print(f\"    Mother: {temp.mother.name}\")\r\n            temp = temp.next\r\n\r\n    def search_person(self, name): \r\n        found = self.find_person(name)  \r\n        if found!=None:\r\n            print(f\" {name} is in the family tree.\")\r\n        else:\r\n            print(f\" {name} not found.\")\r\n\r\n    def show_ancestors(self, name):  # Sonu\r\n        person = self.find_person(name)\r\n        if not person:\r\n            print(\" Person not found.\")\r\n            return\r\n\r\n        print(f\"\\n Ancestors of {person.name}:\")\r\n        self._print_ancestors(person, 1)\r\n\r\n    def _print_ancestors(self, person, level):\r\n        if person.father!=None:\r\n            print(\"  \" * level + f\" Father: {person.father.name}\")\r\n            self._print_ancestors(person.father, level + 1)\r\n        if person.mother:\r\n            print(\"  \" * level + f\" Mother: {person.mother.name}\")\r\n            self._print_ancestors(person.mother, level + 1)\r\n\r\n\r\ndef main():\r\n    tree = FamilyTree()\r\n\r\n    while True:\r\n        print(\"\\n====== Family Tree Builder ======\")\r\n        print(\"  Add Person \")\r\n        print(\"  Set Parents \")\r\n        print(\"  Display Family Tree \")\r\n        print(\"  Search Person \")\r\n        print(\"  Show Ancestors \")\r\n        print(\"  Exit \")\r\n        print(\"==================================\")\r\n        choice = input(\" Choose an option: \")\r\n\r\n        if choice == '1':\r\n            name = input(\" Enter person's name: \")  \r\n            tree.add_person(name)   \r\n\r\n        elif choice == '2':\r\n            child = input(\" Enter child's name: \")\r\n            father = input(\" Enter father's name: \")\r\n            mother = input(\" Enter mother's name: \")\r\n            tree.set_parents(child, father, mother) \r\n\r\n        elif choice == '3':\r\n            tree.display_tree()\r\n\r\n        elif choice == '4':\r\n            name = input(\" Enter name to search: \")\r\n            tree.search_person(name)\r\n\r\n        elif choice == '5':\r\n            name = input(\" Enter name to show ancestors: \")\r\n            tree.show_ancestors(name) \r\n\r\n        elif choice == '6':\r\n            print(\" Exiting. Goodbye!\")\r\n            break\r\n\r\n        else:\r\n            print(\" Invalid choice. Try again.\")\r\n\r\n\r\nif __name__ == \"__main__\":\r\n    main()<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Program 1 # Project: Family Tree Builder (Based on BT and Linked list) # Objective: # To create a basic system that allows users to build, manage, and # explore a family tree structure,&#46;&#46;&#46;<\/p>\n","protected":false},"author":581,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32847],"tags":[32853,34873,32922,32923,34829,32848,34816,34871,34870,34872],"class_list":["post-145792","post","type-post","status-publish","format-standard","hentry","category-dsa-python-tutorials","tag-dsa-python","tag-dsa-python-family-tree-builder-project","tag-dsa-python-practical","tag-dsa-python-program","tag-dsa-python-project","tag-dsa-using-python","tag-family-tree-builder","tag-family-tree-builder-in-dsa-python","tag-family-tree-builder-project","tag-family-tree-builder-using-dsa-python"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DSA Python Project - Family Tree Builder - DataFlair<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/family-tree-builder-in-dsa-python\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DSA Python Project - Family Tree Builder - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Program 1 # Project: Family Tree Builder (Based on BT and Linked list) # Objective: # To create a basic system that allows users to build, manage, and # explore a family tree structure,&#046;&#046;&#046;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/data-flair.training\/blogs\/family-tree-builder-in-dsa-python\/\" \/>\n<meta property=\"og:site_name\" content=\"DataFlair\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/DataFlairWS\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-11T07:28:54+00:00\" \/>\n<meta name=\"author\" content=\"DataFlair Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:site\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"DataFlair Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"DSA Python Project - Family Tree Builder - DataFlair","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/data-flair.training\/blogs\/family-tree-builder-in-dsa-python\/","og_locale":"en_US","og_type":"article","og_title":"DSA Python Project - Family Tree Builder - DataFlair","og_description":"Program 1 # Project: Family Tree Builder (Based on BT and Linked list) # Objective: # To create a basic system that allows users to build, manage, and # explore a family tree structure,&#46;&#46;&#46;","og_url":"https:\/\/data-flair.training\/blogs\/family-tree-builder-in-dsa-python\/","og_site_name":"DataFlair","article_publisher":"https:\/\/www.facebook.com\/DataFlairWS\/","article_published_time":"2025-07-11T07:28:54+00:00","author":"DataFlair Team","twitter_card":"summary_large_image","twitter_creator":"@DataFlairWS","twitter_site":"@DataFlairWS","twitter_misc":{"Written by":"DataFlair Team","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/data-flair.training\/blogs\/family-tree-builder-in-dsa-python\/#article","isPartOf":{"@id":"https:\/\/data-flair.training\/blogs\/family-tree-builder-in-dsa-python\/"},"author":{"name":"DataFlair Team","@id":"https:\/\/data-flair.training\/blogs\/#\/schema\/person\/c187795dc82ab948373cca526df7c445"},"headline":"DSA Python Project &#8211; 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