Replace list with a tuple as an argument when setting success_codes

* gn3/commands.py (run_cmd): Replace type of success_codes from List to Tuple
* gn3/computations/diff.py (generate_diff): Pass success_codes as a Tuple when
calling "run_cmd".

2 files changed, 3 insertions, 2 deletions

diff --git a/gn3/commands.py b/gn3/commands.py
index 0f526d8..7d42ced 100644
--- a/gn3/commands.py
+++ b/gn3/commands.py
@@ -6,6 +6,7 @@ from datetime import datetime
 from typing import Dict
 from typing import List
 from typing import Optional
+from typing import Tuple
 from uuid import uuid4
 from redis.client import Redis  # Used only in type hinting
 
@@ -74,7 +75,7 @@ Returns the name of the specific redis hash for the specific task.
     return unique_id
 
 
-def run_cmd(cmd: str, success_codes: List = [0]) -> Dict:
+def run_cmd(cmd: str, success_codes: Tuple = (0,)) -> Dict:
     """Run CMD and return the CMD's status code and output as a dict"""
     results = subprocess.run(cmd, capture_output=True, shell=True,
                              check=False)
diff --git a/gn3/computations/diff.py b/gn3/computations/diff.py
index 4bbc6cf..af02f7f 100644
--- a/gn3/computations/diff.py
+++ b/gn3/computations/diff.py
@@ -6,7 +6,7 @@ from gn3.commands import run_cmd
 
 def generate_diff(data: str, edited_data: str) -> Optional[str]:
     """Generate the diff between 2 files"""
-    results = run_cmd(f"diff {data} {edited_data}", success_codes=[1, 2])
+    results = run_cmd(f"diff {data} {edited_data}", success_codes=(1, 2))
     if results.get("code", -1) > 0:
         return results.get("output")
     return None