feat: instantiate platform without parameters

src/qibolab/_core/platform/load.py

@@ -62,7 +62,7 @@ def locate_platform(name: str, paths: Optional[list[Path]] = None) -> Path:
     return _search(name, paths)
 
 
-def create_platform(name: str, params: Optional[dict] = None) -> Platform:
+def create_platform(name: str, parameters: Optional[Parameters] = None) -> Platform:
     """A platform for executing quantum algorithms.
 
     It consists of a quantum processor QPU and a set of controlling instruments.
@@ -83,10 +83,10 @@ def create_platform(name: str, params: Optional[dict] = None) -> Platform:
     if isinstance(hardware, Platform):
         return hardware
 
-    if params is None:
+    if parameters is None:
         return Platform.load(path, **hardware)
 
-    return Platform(**hardware, parameters=Parameters(**params))
+    return Platform(**hardware, parameters=parameters)
 
 
 def available_platforms() -> list[str]:

src/qibolab/_core/platform/platform.py

@@ -16,6 +16,7 @@
     InstrumentMap,
     NativeGates,
     Parameters,
+    ParametersBuilder,
     QubitMap,
     Settings,
     Update,
@@ -310,13 +311,13 @@ def load(
         if couplers is None:
             couplers = {}
 
-        return cls(
-            name=name,
-            parameters=Parameters.model_validate_json((path / PARAMETERS).read_text()),
-            instruments=instruments,
-            qubits=qubits,
-            couplers=couplers,
-        )
+        hardware = {"instruments": instruments, "qubits": qubits, "couplers": couplers}
+        try:
+            parameters = Parameters.model_validate_json((path / PARAMETERS).read_text())
+        except FileNotFoundError:
+            parameters = ParametersBuilder(hardware=hardware).build()
+
+        return cls(name=name, parameters=parameters, **hardware)
 
     def dump(self, path: Path):
         """Dump platform."""