Python Program to Implement Fibonacci Heap

import math
 
class FibonacciTree:
    def __init__(self, key):
        self.key = key
        self.children = []
        self.order = 0
 
    def add_at_end(self, t):
        self.children.append(t)
        self.order = self.order + 1
 
 
class FibonacciHeap:
    def __init__(self):
        self.trees = []
        self.least = None
        self.count = 0
 
    def insert(self, key):
        new_tree = FibonacciTree(key)
        self.trees.append(new_tree)
        if (self.least is None or key < self.least.key):
            self.least = new_tree
        self.count = self.count + 1
 
    def get_min(self):
        if self.least is None:
            return None
        return self.least.key
 
    def extract_min(self):
        smallest = self.least
        if smallest is not None:
            for child in smallest.children:
                self.trees.append(child)
            self.trees.remove(smallest)
            if self.trees == []:
                self.least = None
            else:
                self.least = self.trees[0]
                self.consolidate()
            self.count = self.count - 1
            return smallest.key
 
    def consolidate(self):
        aux = (floor_log2(self.count) + 1)*[None]
 
        while self.trees != []:
            x = self.trees[0]
            order = x.order
            self.trees.remove(x)
            while aux[order] is not None:
                y = aux[order]
                if x.key > y.key:
                    x, y = y, x
                x.add_at_end(y)
                aux[order] = None
                order = order + 1
            aux[order] = x
 
        self.least = None
        for k in aux:
            if k is not None:
                self.trees.append(k)
                if (self.least is None
                    or k.key < self.least.key):
                    self.least = k
 
 
def floor_log2(x):
    return math.frexp(x)[1] - 1
 
 
fheap = FibonacciHeap()
 
print('Menu')
print('insert <data>')
print('min get')
print('min extract')
print('quit')
 
while True:
    do = input('What would you like to do? ').split()
 
    operation = do[0].strip().lower()
    if operation == 'insert':
        data = int(do[1])
        fheap.insert(data)
    elif operation == 'min':
        suboperation = do[1].strip().lower()
        if suboperation == 'get':
            print('Minimum value: {}'.format(fheap.get_min()))
        elif suboperation == 'extract':
            print('Minimum value removed: {}'.format(fheap.extract_min()))
 
    elif operation == 'quit':
        break

Output

Menu
insert <data>
min get
min extract
quit
What would you like to do? insert 3
What would you like to do? insert 2
What would you like to do? insert 7
What would you like to do? min get
Minimum value: 2
What would you like to do? min extract
Minimum value removed: 2
What would you like to do? min extract
Minimum value removed: 3
What would you like to do? min extract
Minimum value removed: 7
What would you like to do? min extract
Minimum value removed: None
What would you like to do? quit