creat app.py

app.py

@@ -0,0 +1,33 @@
+from pydantic import BaseModel
+from fastapi import FastAPI
+from typing import List, Optional
+
+app = FastAPI()
+
+# 1. Define the blueprint for APIs
+class Customer(BaseModel):
+    name: str
+    email: str
+    phone: Optional[str] = None
+    address: Optional[str] = None
+
+customers_list = []
+# Create
+@app.post("/customers", response_model=Customer)
+def create_customer(customer: Customer):
+    customers_list.append(customer)
+    return customer
+# Read
+@app.get("/customers", response_model=List[Customer])
+def get_customers():
+    return customers_list
+#Update
+@app.put("/customers/{customer_id}", response_model=Customer)
+def update_customer(customer_id: int, customer: Customer):
+    customers_list[customer_id] = customer
+    return customer
+#Delete
+@app.delete("/customers/{customer_id}", response_model=Customer)
+def delete_customer(customer_id: int):
+    customers_list.pop(customer_id)
+    return {"message": "Customer deleted successfully"}