Added Ruff Recommendations

Based on ruff Recommendations
    - Removed WhiteSpaces
    - Moved the Import to beginning
    - Replaced assertTrue with regular assert

Author: rtron-24

data_structures/trie/radix_tree.py

@@ -1,9 +1,10 @@
+import unittest
+
 """
 A Radix Tree is a data structure that represents a space-optimized
 trie (prefix tree) in whicheach node that is the only child is merged
 with its parent [https://en.wikipedia.org/wiki/Radix_tree]
 """
-import unittest
 
 class RadixNode:
     def __init__(self, prefix: str = "", is_leaf: bool = False) -> None:
@@ -204,30 +205,29 @@ def test_trie(self) -> None:
         root = RadixNode()
         root.insert_many(words)
 
-        self.assertTrue(all(root.find(word) for word in words))
-        self.assertFalse(root.find("bandanas"))
-        self.assertFalse(root.find("apps"))
+        assert all(root.find(word) for word in words)
+        assert not root.find("bandanas")
+        assert not root.find("apps")
         root.delete("all")
-        self.assertFalse(root.find("all"))
+        assert not root.find("all")
         root.delete("banana")
-        self.assertFalse(root.find("banana"))
-        self.assertTrue(root.find("bananas"))
-    
+        assert not root.find("banana")
+        assert root.find("bananas")
 
     def test_trie_2(self) -> None:
         '''
         now add a new test case which inserts 
         foobbb, fooaaa, foo in the given order and checks for different assertions
-        ''' 
+        '''
         words = "foobbb fooaaa foo".split()
         root = RadixNode()
         root.insert_many(words)
 
-        self.assertTrue(all(root.find(word) for word in words))
+        assert all(root.find(word) for word in words)
         root.delete("foo")
-        self.assertFalse(root.find("foo"))
-        self.assertTrue(root.find("foobbb"))
-        self.assertTrue(root.find("fooaaa"))
+        assert not root.find("foo")
+        assert root.find("foobbb")
+        assert root.find("fooaaa")
 
 if __name__ == "__main__":
     unittest.main()