diff --git a/core/base_pattern.py b/core/base_pattern.py
index 9277605..a93c8dc 100644
--- a/core/base_pattern.py
+++ b/core/base_pattern.py
@@ -27,7 +27,7 @@ class BasePattern:
     outputs:Dict[str,Any]
     # A collection of variables to be swept over for job scheduling
     sweep:Dict[str,Any]
-
+    # TODO Add requirements to patterns
     def __init__(self, name:str, recipe:str, parameters:Dict[str,Any]={}, 
             outputs:Dict[str,Any]={}, sweep:Dict[str,Any]={}):
         """BasePattern Constructor. This will check that any class inheriting 
diff --git a/functionality/requirements.py b/functionality/requirements.py
new file mode 100644
index 0000000..ce45521
--- /dev/null
+++ b/functionality/requirements.py
@@ -0,0 +1,43 @@
+"""
+This file contains functions and definitions used in pattern and recipe 
+requirements, and assessed by handlers and conductors.
+
+Author(s): David Marchant
+"""
+
+from typing import Any, Dict, List, Tuple, Union
+
+from core.correctness.validation import check_type
+
+REQUIREMENT_PYTHON = "python"
+REQ_PYTHON_MODULES = "modules"
+REQ_PYTHON_VERSION = "version"
+REQ_PYTHON_ENVIRONMENT = "environment"
+
+
+def create_requirement_dict(key:str, entires:Dict[str,Any]
+        )->Tuple[str,Dict[str,Any]]:
+    return key, entires
+
+def create_python_requirements(modules:Union[str,List[str]]="", 
+        version:str="", environment:str="")->Dict[str,Any]:
+    check_type(modules, str, alt_types=[List])
+    if not isinstance(modules, List):
+        modules = [modules]
+    for i, module in enumerate(modules):
+        check_type(module, str, hint="create_python_requirement.modules[i]")
+    check_type(version, str)
+    check_type(environment, str)
+    
+    python_reqs = {}
+
+    if modules != [""]:
+        python_reqs[REQ_PYTHON_MODULES] = modules
+
+    if version:
+        python_reqs[REQ_PYTHON_VERSION] = version
+    
+    if environment:
+        python_reqs[REQ_PYTHON_ENVIRONMENT] = environment
+
+    return create_requirement_dict(REQUIREMENT_PYTHON, python_reqs)
diff --git a/tests/test_functionality.py b/tests/test_functionality.py
index f7a44e4..d971cd1 100644
--- a/tests/test_functionality.py
+++ b/tests/test_functionality.py
@@ -13,7 +13,7 @@ from core.base_rule import BaseRule
 from core.correctness.vars import CHAR_LOWERCASE, CHAR_UPPERCASE, \
     SHA256, EVENT_TYPE, EVENT_PATH, EVENT_TYPE_WATCHDOG, \
     WATCHDOG_BASE, WATCHDOG_HASH, EVENT_RULE, JOB_PARAMETERS, JOB_HASH, \
-    PYTHON_FUNC, JOB_ID, JOB_EVENT, SWEEP_JUMP, SWEEP_START, SWEEP_STOP, \
+    PYTHON_FUNC, JOB_ID, JOB_EVENT, \
     JOB_TYPE, JOB_PATTERN, JOB_RECIPE, JOB_RULE, JOB_STATUS, JOB_CREATE_TIME, \
     JOB_REQUIREMENTS, STATUS_QUEUED, JOB_TYPE_PAPERMILL
 from functionality.debug import setup_debugging
@@ -31,6 +31,9 @@ from functionality.naming import _generate_id
 from functionality.parameterisation import parameterize_jupyter_notebook, \
     parameterize_python_script
 from functionality.process_io import wait
+from functionality.requirements import create_python_requirements, \
+    REQUIREMENT_PYTHON, REQ_PYTHON_ENVIRONMENT, REQ_PYTHON_MODULES, \
+    REQ_PYTHON_VERSION
 from patterns import FileEventPattern
 from recipes import JupyterNotebookRecipe
 from shared import setup, teardown, valid_recipe_two, valid_recipe_one, \
@@ -886,3 +889,87 @@ class ProcessIoTests(unittest.TestCase):
             elif readable == pipe_one_reader:
                 msg = readable.recv()
                 self.assertEqual(msg, 1)
+
+class RequirementsTest(unittest.TestCase):
+    def setUp(self)->None:
+        super().setUp()
+        setup()
+
+    def tearDown(self)->None:
+        super().tearDown()
+        teardown()
+
+    # Test Python requirement testings
+    def testPythonRequirementCreation(self)->None:
+        key, reqs = create_python_requirements()
+
+        self.assertIsInstance(key, str)
+        self.assertEqual(key, REQUIREMENT_PYTHON)
+        self.assertIsInstance(reqs, dict)
+        self.assertEqual(reqs, {})
+
+        key, reqs = create_python_requirements(modules="first")
+
+        self.assertIsInstance(key, str)
+        self.assertEqual(key, REQUIREMENT_PYTHON)
+        self.assertIsInstance(reqs, dict)
+        self.assertEqual(len(reqs), 1)
+        self.assertIn(REQ_PYTHON_MODULES, reqs)
+        self.assertEqual(len(reqs[REQ_PYTHON_MODULES]), 1)
+        self.assertIsInstance(reqs[REQ_PYTHON_MODULES], list)
+        self.assertEqual(reqs[REQ_PYTHON_MODULES], ["first"])
+
+        key, reqs = create_python_requirements(modules=["first", "second"])
+
+        self.assertIsInstance(key, str)
+        self.assertEqual(key, REQUIREMENT_PYTHON)
+        self.assertIsInstance(reqs, dict)
+        self.assertEqual(len(reqs), 1)
+        self.assertIn(REQ_PYTHON_MODULES, reqs)
+        self.assertEqual(len(reqs[REQ_PYTHON_MODULES]), 2)
+        self.assertIsInstance(reqs[REQ_PYTHON_MODULES], list)
+        self.assertEqual(reqs[REQ_PYTHON_MODULES], ["first", "second"])
+
+        key, reqs = create_python_requirements(version="3.10.6")
+
+        self.assertIsInstance(key, str)
+        self.assertEqual(key, REQUIREMENT_PYTHON)
+        self.assertIsInstance(reqs, dict)
+        self.assertEqual(len(reqs), 1)
+        self.assertIn(REQ_PYTHON_VERSION, reqs)
+        self.assertIsInstance(reqs[REQ_PYTHON_VERSION], str)
+        self.assertEqual(reqs[REQ_PYTHON_VERSION], "3.10.6")
+
+        key, reqs = create_python_requirements(environment="env")
+
+        self.assertIsInstance(key, str)
+        self.assertEqual(key, REQUIREMENT_PYTHON)
+        self.assertIsInstance(reqs, dict)
+        self.assertEqual(len(reqs), 1)
+        self.assertIn(REQ_PYTHON_ENVIRONMENT, reqs)
+        self.assertIsInstance(reqs[REQ_PYTHON_ENVIRONMENT], str)
+        self.assertEqual(reqs[REQ_PYTHON_ENVIRONMENT], "env")
+
+        key, reqs = create_python_requirements(
+            modules=["first", "second"],
+            version="3.10.6",
+            environment="env"
+        )
+
+        self.assertIsInstance(key, str)
+        self.assertEqual(key, REQUIREMENT_PYTHON)
+        self.assertIsInstance(reqs, dict)
+        self.assertEqual(len(reqs), 3)
+        self.assertIn(REQ_PYTHON_MODULES, reqs)
+        self.assertEqual(len(reqs[REQ_PYTHON_MODULES]), 2)
+        self.assertIsInstance(reqs[REQ_PYTHON_MODULES], list)
+        self.assertEqual(reqs[REQ_PYTHON_MODULES], ["first", "second"])
+        self.assertIn(REQ_PYTHON_VERSION, reqs)
+        self.assertIsInstance(reqs[REQ_PYTHON_VERSION], str)
+        self.assertEqual(reqs[REQ_PYTHON_VERSION], "3.10.6")
+        self.assertIn(REQ_PYTHON_ENVIRONMENT, reqs)
+        self.assertIsInstance(reqs[REQ_PYTHON_ENVIRONMENT], str)
+        self.assertEqual(reqs[REQ_PYTHON_ENVIRONMENT], "env")
+
+        # TODO expand me and add values for other attributes
+    
\ No newline at end of file
diff --git a/tests/test_recipes.py b/tests/test_recipes.py
index 06f2257..e854a9e 100644
--- a/tests/test_recipes.py
+++ b/tests/test_recipes.py
@@ -831,5 +831,4 @@ class PythonTests(unittest.TestCase):
         })
         self.assertTrue(status)
 
-
     # TODO test default parameter function execution
\ No newline at end of file