Python Linked List: Search a specific item in a singly linked list and return true if the item is found otherwise return false
Python Linked List: Exercise-3 with Solution
Write a Python program to search a specific item in a singly linked list and return true if the item is found otherwise return false.
Sample Solution:-
Python Code:
class Node:
# Singly linked node
def __init__(self, data=None):
self.data = data
self.next = None
class singly_linked_list:
def __init__(self):
# Createe an empty list
self.tail = None
self.head = None
self.count = 0
def append_item(self, data):
#Append items on the list
node = Node(data)
if self.head:
self.head.next = node
self.head = node
else:
self.tail = node
self.head = node
self.count += 1
def iterate_item(self):
# Iterate the list.
current_item = self.tail
while current_item:
val = current_item.data
current_item = current_item.next
yield val
def search_item(self, val):
# Search the list
for node in self.iterate_item():
if val == node:
return True
return False
items = singly_linked_list()
items.append_item('PHP')
items.append_item('Python')
items.append_item('C#')
items.append_item('C++')
items.append_item('Java')
if items.search_item('SQL'):
print("True")
else:
print("False")
if items.search_item('C++'):
print("True")
else:
print("False")
Sample Output:
False True
Flowchart:
Python Code Editor:
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Previous: Write a Python program to find the size of a singly linked list.
Next: Write a Python program to access a specific item in a singly linked list using index value.
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Python: Tips of the Day
Creates a dictionary with the same keys as the provided dictionary and values generated by running the provided function for each value:
Example:
def tips_map_values(obj, fn): ret = {} for key in obj.keys(): ret[key] = fn(obj[key]) return ret users = { 'Owen': { 'user': 'Owen', 'age': 29 }, 'Eddie': { 'user': 'Eddie', 'age': 15 } } print(tips_map_values(users, lambda u : u['age'])) # {'Owen': 29, 'Eddie': 15}
Output:
{'Owen': 29, 'Eddie': 15}
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