[minor] fix the direct conversion quantum tranduction protocol

Makefile

@@ -1,17 +1,17 @@
 all: jupyter
 
 setup:
-	pip3 install -r ./requirements.txt
+	pip install -r ./requirements.txt
 
 install:
-	pip3 install .
+	pip install .
 
 install_editable:
-	pip3 install --editable . --config-settings editable_mode=strict
+	pip install --editable . --config-settings editable_mode=strict
 
 jupyter:
 	jupyter notebook ./example/two_node_eg.ipynb
 
 test:
-	pip3 install .
+	pip install .
 	pytest ./tests

example/Transducer_Examples/ConversionProtocols.py

@@ -46,18 +46,17 @@ def get_conversion_matrix(efficiency: float) -> Qobj:
 
 
 class EmittingProtocol(Protocol):
+    """Protocol for emission of single microwave photon by transmon.
+    """
 
-    "Protocol for emission of single microwave photon by transmon"
-
-    def __init__(self, own: "Node", name: str, tl: "Timeline", transmon="Transmon", transducer="Transducer"):
-        super().__init__(own, name)
-        self.owner = own
+    def __init__(self, owner: "Node", name: str, tl: "Timeline", transmon="Transmon", transducer="Transducer"):
+        super().__init__(owner, name)
+        self.owner = owner
         self.name = name
         self.tl = tl
         self.transmon = transmon
         self.transducer = transducer
 
-
     def start(self) -> None:
 
         self.transmon.get()
@@ -68,35 +67,32 @@ def start(self) -> None:
                 self.transmon.photon_counter += 1 
             else:
                 pass
-
         else:
-                print("The transmon is in the state 00, or 01, it doesn't emit microwave photons")
+            print("The transmon is in the state 00, or 01, it doesn't emit microwave photons")
 
         print(f"Microwave photons emitted by the Transmon at Tx: {self.transmon.photon_counter}")
 
 
-
     def received_message(self, src: str, msg):
         pass
 
 
 
 class UpConversionProtocol(Protocol):
+    """Protocol for Up-conversion of an input microwave photon into an output optical photon.
+    """
 
-    "Protocol for Up-conversion of an input microwave photon into an output optical photon"
-
-    def __init__(self, own: "Node", name: str, tl: "Timeline", transducer: "Transducer", node: "Node", transmon: "Transmon"):
-        super().__init__(own, name)
-        self.owner = own
+    def __init__(self, owner: "Node", name: str, tl: "Timeline", transducer: "Transducer", node: "Node", transmon: "Transmon"):
+        super().__init__(owner, name)
+        self.owner = owner
         self.name = name
         self.tl = tl
         self.transducer = transducer
         self.transmon = transmon
         self.node = node
 
     def start(self, photon: "Photon") -> None:
-
-
+        """start the protocol"""
         if self.transducer.photon_counter > 0:
             custom_gate = get_conversion_matrix(self.transducer.efficiency)
 
@@ -127,20 +123,20 @@ def received_message(self, src: str, msg):
 
 
 class DownConversionProtocol(Protocol):
+    """Protocol for Down-conversion of an input optical photon into an output microwave photon.
+    """
 
-    "Protocol for Down-conversion of an input optical photon into an output microwave photon"
-
-    def __init__(self, own: "Node", name: str, tl: "Timeline", transducer: "Transducer", transmon: "Transmon"):
-        super().__init__(own, name)
-        self.owner = own
+    def __init__(self, owner: "Node", name: str, tl: "Timeline", transducer: "Transducer", transmon: "Transmon"):
+        super().__init__(owner, name)
+        self.owner = owner
         self.name = name
         self.tl = tl
         self.transducer = transducer
 
     def start(self, photon: "Photon") -> None:
+        """start the protocol"""
         if self.transducer.photon_counter > 0:
 
-
             transducer_state = [0.0 + 0.0j, 0.0 + 0.0j, 1.0 + 0.0j, 0.0 + 0.0j]
             custom_gate = get_conversion_matrix(self.transducer.efficiency)