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4c37eb7d07
* Improved Singly Linked List Added String Representations of Nodes and Linked Lists Added support for indexing and changing of Node data using indices. * Added a few comments to Linked Lists * Reformatted to conform to PEP8 * Added from_sequence.py Convert a Python List to Linked List comprising of Nodes and return head. * Added print_reverse.py Recursive program to print the elements of a Linked List in reverse. * Change 'is not None' for more Pythonicness
46 lines
1.2 KiB
Python
46 lines
1.2 KiB
Python
# Recursive Prorgam to create a Linked List from a sequence and
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# print a string representation of it.
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class Node:
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def __init__(self, data=None):
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self.data = data
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self.next = None
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def __repr__(self):
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"""Returns a visual representation of the node and all its following nodes."""
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string_rep = ""
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temp = self
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while temp:
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string_rep += f"<{temp.data}> ---> "
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temp = temp.next
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string_rep += "<END>"
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return string_rep
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def make_linked_list(elements_list):
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"""Creates a Linked List from the elements of the given sequence
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(list/tuple) and returns the head of the Linked List."""
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# if elements_list is empty
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if not elements_list:
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raise Exception("The Elements List is empty")
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# Set first element as Head
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head = Node(elements_list[0])
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current = head
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# Loop through elements from position 1
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for data in elements_list[1:]:
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current.next = Node(data)
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current = current.next
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return head
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list_data = [1,3,5,32,44,12,43]
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print(f"List: {list_data}")
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print("Creating Linked List from List.")
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linked_list = make_linked_list(list_data)
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print("Linked List:")
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print(linked_list)
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