use builtin function

api/hanyadikhetvan/__init__.py

@@ -0,0 +1,11 @@
+from math import floor
+from datetime import date
+import azure.functions as func
+
+
+def main(req: func.HttpRequest) -> func.HttpResponse:
+    startdate = date(2022, 2, 6)
+    currentweek = floor((date.today() - startdate).days / 7)
+    return func.HttpResponse(
+        str(currentweek),
+        status_code=200)

api/hanyadikhetvan/function.json

@@ -0,0 +1,19 @@
+{
+    "scriptFile": "__init__.py",
+    "bindings": [
+        {
+            "authLevel": "anonymous",
+            "type": "httpTrigger",
+            "direction": "in",
+            "name": "req",
+            "methods": [
+                "get"
+            ]
+        },
+        {
+            "type": "http",
+            "direction": "out",
+            "name": "$return"
+        }
+    ]
+}