Added inventory application

July21/EffectivePython/inventory/data/inventory.json

@@ -0,0 +1 @@
+{"items": [{"id": 1, "name": "iphone", "price": 120000.0, "quantity": 10}, {"id": 2, "name": "oneplus 9", "price": 90000.0, "quantity": 10}]}

July21/EffectivePython/inventory/inventory.py

@@ -0,0 +1,50 @@
+import os
+from dataclasses import dataclass
+def get_empty_inventory():
+    """
+    This method returns an empty dictionary containing 
+    inventory data
+    """
+    inventory_dict = dict()
+    inventory_dict['items'] = list()
+    return inventory_dict
+
+def inventory_file_path():
+    """
+    This method returns standard inventory file path
+    """
+    return 'data/inventory.json'
+
+def is_inventory_available():
+    """
+    Returns:
+      True if the inventory file is found else returns false
+    """
+    return os.path.exists(inventory_file_path()) and os.path.isfile(inventory_file_path())
+
+@dataclass
+class Inventory:
+    id: int
+    name: str
+    price: float
+    quantity: int
+
+    def to_dict(self):
+        """
+        This method returns dictionary representation of Inventory object
+        """
+        inv = dict()
+        inv['id'] = self.id
+        inv['name'] = self.name
+        inv['price'] = self.price
+        inv['quantity'] = self.quantity
+        return inv
+
+    @staticmethod
+    def read_inventory_from_input():
+        id = int(input('Enter the id: '))
+        name = input('Enter the product name: ')
+        price = float(input('Enter the product price: '))
+        quantity = int(input('Enter the quantity: '))
+        inventory = Inventory(id,name,price,quantity)
+        return inventory

July21/EffectivePython/inventory/main.py

@@ -0,0 +1,22 @@
+"""
+This module is used to store the inventory data 
+"""
+import inventory
+import json
+
+if __name__ == '__main__':
+    print("Enter the inventory details")
+    inventory_dict = inventory.get_empty_inventory()
+
+    while True:
+        inv = inventory.Inventory.read_inventory_from_input()
+        inventory_dict['items'].append(inv.to_dict())
+        choice = input('Enter n to stop and any other key to continue')
+        if choice == 'n':
+            break
+
+    with open(inventory.inventory_file_path(), 'w') as inv_file:
+        json.dump(inventory_dict, inv_file)
+
+
+