Add get_process_instance_history function

Author: mario-winkler

README.md

@@ -2,7 +2,10 @@
 
 This repo is an evolution of https://github.com/camunda-community-hub/camunda-external-task-client-python3.
 
-It has been adapted for the use with the [Operaton](https://operaton.org/) BPMN engine.
+The following changes have been made in the original implementation:
+- renamed Camunda to Operation for the use with the [Operaton](https://operaton.org/) BPMN engine
+- added a function to retrieve the history of a process instance
+
 
 ## Introduction
 

operaton/client/engine_client.py

@@ -178,3 +178,10 @@ def get_process_instance_variable(self, process_instance_id, variable_name, with
         if with_meta:
             return dict(resp_json, value=decoded_value)
         return decoded_value
+
+    def get_process_instance_history(self, process_instance_id):
+        url = f"{self.engine_base_url}/history/process-instance/{process_instance_id}"
+        response = requests.get(url, headers=self._get_headers())
+        raise_exception_if_not_ok(response)
+        resp_json = response.json()
+        return resp_json

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "operaton_external_task_client_python3"
-version = "1.0.2"
+version = "1.0.3"
 authors = [
     { name = "Deserve Labs", email="devteam@deserve.com" },
     { name = "DLR terrabyte", email="terrabyte@dlr.de" }