From 07838fc0c19c751dfb405e4e0464a1bdce437a68 Mon Sep 17 00:00:00 2001
From: Virginia <virginia.m.frey@gmail.com>
Date: Wed, 30 Jan 2019 14:13:27 +1100
Subject: [PATCH 1/3] Add conjugate_transpose function

---
 two_qubit_simulator/utilities.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 two_qubit_simulator/utilities.py

diff --git a/two_qubit_simulator/utilities.py b/two_qubit_simulator/utilities.py
new file mode 100644
index 0000000..09fc142
--- /dev/null
+++ b/two_qubit_simulator/utilities.py
@@ -0,0 +1,22 @@
+"""
+# utilities.py
+Contains utility functions for the two_qubit_simulator module
+"""
+import numpy as np
+
+def conjugate_transpose(array):
+    """ Calculates the conjugate transpose of an array
+
+        Parameters
+        -------
+        array : numpy ndarray
+            The array to be transposed
+        
+        Returns
+        -------
+        numpy ndarray
+            The conjugate transpose of the input array
+    """
+    return np.conjugate(
+        np.transpose(array)
+    )

From 51a855dfe61f317844cd9932860015fc14b7acfc Mon Sep 17 00:00:00 2001
From: Virginia <virginia.m.frey@gmail.com>
Date: Wed, 30 Jan 2019 14:18:06 +1100
Subject: [PATCH 2/3] Add test

---
 tests/test_utilities.py         | 19 +++++++++++++++++++
 two_qubit_simulator/__init__.py |  1 +
 2 files changed, 20 insertions(+)
 create mode 100644 tests/test_utilities.py

diff --git a/tests/test_utilities.py b/tests/test_utilities.py
new file mode 100644
index 0000000..260cb9a
--- /dev/null
+++ b/tests/test_utilities.py
@@ -0,0 +1,19 @@
+"""
+# test_utilities.py
+Test the functions in the utilities module
+"""
+from two_qubit_simulator import conjugate_transpose
+
+def test_conjugate_transpose():
+    # Test with real-valued array
+    test_array_1 = np.array([[1, 2], [3, 4]])
+    assert np.allclose(
+        conjugate_transpose(test_array_1),
+        np.array([[1, 3], [2, 4]])
+    )
+    # Test with complex-valued array
+    test_array_1 = np.array([[1j, 2], [1j, 4]])
+    assert np.allclose(
+        conjugate_transpose(test_array_1),
+        np.array([[-1j, -1j], [2, 4]])
+    )
diff --git a/two_qubit_simulator/__init__.py b/two_qubit_simulator/__init__.py
index 942b51f..e925c73 100644
--- a/two_qubit_simulator/__init__.py
+++ b/two_qubit_simulator/__init__.py
@@ -2,3 +2,4 @@
 Initialise the two_qubit_simulator module.
 Add import statements from auxilirary modules here.
 """
+from .utilities import conjugate_transpose
\ No newline at end of file

From 5262a4b7fbde4986b560e17f76d2348ff5da147e Mon Sep 17 00:00:00 2001
From: Virginia <virginia.m.frey@gmail.com>
Date: Wed, 30 Jan 2019 14:19:53 +1100
Subject: [PATCH 3/3] fixed numpy import

---
 .cache/v/cache/lastfailed | 1 +
 tests/test_utilities.py   | 1 +
 2 files changed, 2 insertions(+)
 create mode 100644 .cache/v/cache/lastfailed

diff --git a/.cache/v/cache/lastfailed b/.cache/v/cache/lastfailed
new file mode 100644
index 0000000..9e26dfe
--- /dev/null
+++ b/.cache/v/cache/lastfailed
@@ -0,0 +1 @@
+{}
\ No newline at end of file
diff --git a/tests/test_utilities.py b/tests/test_utilities.py
index 260cb9a..eb3777b 100644
--- a/tests/test_utilities.py
+++ b/tests/test_utilities.py
@@ -2,6 +2,7 @@
 # test_utilities.py
 Test the functions in the utilities module
 """
+import numpy as np
 from two_qubit_simulator import conjugate_transpose
 
 def test_conjugate_transpose():