Started adding functions to the API that work

Author: miriamkw

README.md

@@ -101,9 +101,9 @@ Adjust the paths, function names, and details as per your specific project setup
 
 
 To do:
-- [ ] add a python folder
-- [ ] add a test folder
-- [ ] add the dlib build script 
+- [X] add a python folder
+- [X] add a test folder
+- [X] add the dlib build script 
   - build to python folder
   - add readme
 - [ ] write python functions api 
@@ -116,10 +116,13 @@ To do:
 - [ ] clean up code python
 - [ ] update readme with new changes
   - explanation, separating between python and swift code
+  - example usage of the api (with signal handlers)
+  - refer to example input files
   - build, venv, run commands
   - pypi
   - running tests
 - [ ] merge to main
+- [ ] next project: take a df as input, convert to json (or do it in tidepool study?)
 
 
 

Sources/LoopAlgorithmToPython/LoopAlgorithmToPython.swift

@@ -439,10 +439,6 @@ extension ISO8601DateFormatter {
 
 
 
-
-
-
-
 // Copied code because the struct was not public
 struct LinearAbsorption: CarbAbsorptionComputable {
     func percentAbsorptionAtPercentTime(_ percentTime: Double) -> Double {

python_api/helpers.py

@@ -0,0 +1,11 @@
+"""
+Helper functions not directly related to the API.
+"""
+import json
+
+
+def get_bytes_from_json(json_file):
+    json_str = json.dumps(json_file)  # Convert JSON data to JSON string
+    json_bytes = json_str.encode('utf-8')  # Convert JSON string to bytes
+    return json_bytes
+

python_api/python_api.py

@@ -0,0 +1,55 @@
+"""
+This file provides an API for calling the functions in the dynamic library. These functions are c-embeddings
+for swift functions, found in Sources/LoopAlgorithmToPython/LoopAlgorithmToPython.swift.
+"""
+from helpers import get_bytes_from_json
+
+import ctypes
+import json
+
+
+swift_lib = ctypes.CDLL('python_api/libLoopAlgorithmToPython.dylib')
+
+
+# This function helps with providing more informative error messages if the code fails
+def initialize_exception_handlers():
+    # Define the function prototypes
+    initializeExceptionHandler = swift_lib.initializeExceptionHandler
+    initializeExceptionHandler.restype = None
+
+    initializeSignalHandlers = swift_lib.initializeSignalHandlers
+    initializeSignalHandlers.restype = None
+
+    # Initialize the exception handler and signal handlers
+    initializeExceptionHandler()
+    initializeSignalHandlers()
+
+
+def generate_prediction(json_file, len=82):
+    json_bytes = get_bytes_from_json(json_file)
+
+    swift_lib.generatePrediction.argtypes = [ctypes.c_char_p]
+    swift_lib.generatePrediction.restype = ctypes.POINTER(ctypes.c_double)
+
+    result = swift_lib.generatePrediction(json_bytes)
+    result_array = [result[i] for i in range(len)]
+
+    return result_array
+
+
+
+
+
+
+
+
+
+
+with open('python_tests/test_files/generate_prediction_input.json', 'r') as f:
+    json_file = json.load(f)
+
+
+initialize_exception_handlers()
+res = generate_prediction(json_file)
+
+print(res)

python_tests/python_tests.py

@@ -0,0 +1,4 @@
+import pytest
+
+
+