Add dictionary.py to demonstrate dictionary operations and manipulations in Python

Wcoder547 · Wcoder547 · commit a2af96fe30e5 · 2025-07-03T10:23:43.000+05:00
diff --git a/Dictionary/dictionary.py b/Dictionary/dictionary.py
@@ -0,0 +1,74 @@
+# Create a dictionary
+chai_types = {"Masala": "spicy", "ginger": "zesty", "Green": "Mild"}
+print(chai_types)
+
+# Access values
+print(chai_types["Masala"])        # 'spicy'
+print(chai_types.get("ginger"))    # 'zesty'
+print(chai_types.get("Gingery"))   # None (not in dictionary)
+
+# Update value
+chai_types["Green"] = "Fresh"
+print("Updated 'Green':", chai_types)
+
+# Loop over keys
+for chai in chai_types:
+    print("Key:", chai)
+
+# Loop over keys with values
+for chai in chai_types:
+    print("Key-Value:", chai, chai_types[chai])
+
+# Loop using .items()
+for key, value in chai_types.items():
+    print("With .items():", key, value)
+
+# Membership test
+if "Masala" in chai_types:
+    print("I have masala tea")
+
+# Length
+print("Length:", len(chai_types))
+
+# Add new key-value pair
+chai_types["Earl Grey"] = "Citrus"
+print("Added 'Earl Grey':", chai_types)
+
+# Remove key 
+chai_types.pop("ginger")
+
+# Remove last inserted item
+chai_types.popitem()
+
+# Delete key
+del chai_types["Green"]
+
+# Copy dictionary
+chai_types_copy = chai_types.copy()
+print("Copied dict:", chai_types_copy)
+
+# Nested dictionary
+tea_shop = {
+    "chai": {
+        "Masala": "Spicy",
+        "Ginger": "zesty"
+    },
+    "Tea": {
+        "Green": "Mild",
+        "Black": "strong"
+    }
+}
+print("Nested dict:", tea_shop)
+print("chai category:", tea_shop["chai"])
+print("Ginger tea:", tea_shop["chai"]["Ginger"])
+
+# Dictionary comprehension
+squard_num = {x: x**2 for x in range(6)}
+print("Squared numbers:", squard_num)
+
+# Creating a dictionary from keys with default value
+keys = ["Masala", "Ginger", "Lemon"]
+default_value = "Delicious"
+new_dict = dict.fromkeys(keys, default_value)
+print("New dict with default values:", new_dict)
+``
