Add functions to remove duplicates and count items

Author: ayseearslan09-byte

Week03/sequences_ayse_arslan.py

@@ -0,0 +1,29 @@
+def remove_duplicates(seq: list) -> list:
+    result = []
+
+    for item in seq:
+        if item not in result:
+            result.append(item)
+
+    return result
+
+
+def list_counts(seq: list) -> dict:
+    counts = {}
+
+    for item in seq:
+        if item in counts:
+            counts[item] += 1
+        else:
+            counts[item] = 1
+
+    return counts
+
+
+def reverse_dict(d: dict) -> dict:
+    result = {}
+
+    for key, value in d.items():
+        result[value] = key
+
+    return result