initial commit

Prog_2A/lab_3/Hash_table.py

@@ -0,0 +1,45 @@
+class Student:
+    def __init__(self, number, name, email):
+        self.number = number
+        self.name = name
+        self.email = email
+        self.MAX_HASH =100000
+
+    def __str__(self):
+        return f"Student: {self.name} ({self.email}, {self.number})"
+
+    def __hash__(self):
+        return (id(self.number) + id(self.name) + id(self.email)) % self.MAX_HASH
+
+
+class HashTable:
+    def __init__(self, elements):
+        self.bucket_size = len(elements) * 3
+        self.buckets = [[] for i in range(self.bucket_size)]
+        self._assign_buckets(elements)
+        self.insertion_order = []
+
+    def __iter__(self):
+        ret_list = []
+        for index, obj_id in self.insertion_order:
+            for obj in self.buckets[index]:
+                if id(obj) == obj_id:
+                    ret_list.append(obj)
+        return iter(ret_list)
+
+    def _assign_buckets(self, elements):
+        for obj in elements:
+            hashed_value = hash(obj)
+            index = hashed_value % self.bucket_size
+            self.buckets[index].append(obj)
+            self.insertion_order.insert((index, id(obj)))
+
+    def get_value(self,input_key):
+        return self.buckets[input_key]
+
+def main():
+    arthur = Student("097", "Arthur", "artur@blade.hex")
+    eleanor = Student("098", "Eleanor", "eleano@plague.hex")
+    aoi = Student("099", "Aoi", "aoi@magnet.hex")
+    hash_table = HashTable([arthur,eleanor,aoi])
+

Prog_2A/lab_3/own_hash.py

@@ -0,0 +1,20 @@
+
+class Student:
+
+    def __init__(self, number, name, email):
+        self.number = number
+        self.name = name
+        self.email = email
+        self.MAX_HASH =100000
+
+    def __str__(self):
+        return f"Student: {self.name} ({self.email}, {self.number})"
+
+    def __hash__(self):
+        return (id(self.number) + id(self.name) + id(self.email)) % self.MAX_HASH
+
+def main():
+    student = Student("0975", "Arthur", "arthur@blade.hex")
+    print(hash(student))
+for _ in range(10):
+    main()