(resolves #83) Add qubit to src imports and run black formatter

Problem
- Project runs black formatter
- qubit needs to be included in root import

Solution
- run `black qcpy/`
- add `from ./qubit import *`

src/__init__.py

@@ -2,3 +2,4 @@
 from .quantum_gate import gates
 from .visualize import *
 from .tools import *
+from .qubit import *

src/quantum_circuit/quantum_circuit.py

@@ -216,8 +216,7 @@ def qft(self, qubit_one: int, qubit_two: int, qubit_three: int) -> None:
         self.calculator.pass_multi_gate(qubit_one, qubit_three, paulix())
         self.calculator.pass_multi_gate(qubit_three, qubit_one, paulix())
         self.calculator.pass_multi_gate(qubit_one, qubit_three, paulix())
-        self.circuit_drawing.add_block(
-            "QFT", [qubit_one, qubit_two, qubit_three])
+        self.circuit_drawing.add_block("QFT", [qubit_one, qubit_two, qubit_three])
 
     def rccx(self, control_one: int, control_two: int, target: int) -> None:
         self.calculator.pass_single_gate(target, u(np.pi / 2, 0, np.pi))
@@ -229,8 +228,7 @@ def rccx(self, control_one: int, control_two: int, target: int) -> None:
         self.calculator.pass_multi_gate(control_two, target, paulix())
         self.calculator.pass_single_gate(target, u(0, 0, (-1 * np.pi) / 4))
         self.calculator.pass_single_gate(target, u(np.pi / 2, 0, np.pi))
-        self.circuit_drawing.add_block(
-            "RCCX", [control_one, control_two, target])
+        self.circuit_drawing.add_block("RCCX", [control_one, control_two, target])
 
     def rc3x(self, qubit_1: int, qubit_2: int, qubit_3: int, qubit_4: int) -> None:
         self.calculator.pass_single_gate(qubit_4, u(np.pi / 2, 0, np.pi))
@@ -251,8 +249,7 @@ def rc3x(self, qubit_1: int, qubit_2: int, qubit_3: int, qubit_4: int) -> None:
         self.calculator.pass_multi_gate(qubit_3, qubit_4, paulix())
         self.calculator.pass_single_gate(qubit_4, u(0, 0, (-1 * np.pi / 4)))
         self.calculator.pass_single_gate(qubit_4, u(np.pi / 2, 0, np.pi))
-        self.circuit_drawing.add_block(
-            "RC3X", [qubit_1, qubit_2, qubit_3, qubit_4])
+        self.circuit_drawing.add_block("RC3X", [qubit_1, qubit_2, qubit_3, qubit_4])
 
     def swap(self, qubit_one: int, qubit_two: int) -> None:
         self.calculator.pass_multi_gate(qubit_one, qubit_two, paulix())

src/tools/__init__.py

@@ -1,4 +1,3 @@
-
 from .measure import measure
 from .probability import probability
 from .phase_angle import phase_angle as phaseangle

src/tools/probability.py

@@ -5,7 +5,10 @@
 
 
 def probability(
-    quantum_state: Union[ndarray, QuantumCircuit], show_percent: bool = False, show_bit: int = -1, round: int = 3
+    quantum_state: Union[ndarray, QuantumCircuit],
+    show_percent: bool = False,
+    show_bit: int = -1,
+    round: int = 3,
 ):
 
     circuit_size = int(log2(quantum_state.size))