Merge pull request #456 from jhonabreul/bug-451-python-logcal-debugging

Enable local Python debugging with DebugPy

README.md

@@ -143,7 +143,7 @@ Usage: lean backtest [OPTIONS] PROJECT
 Options:
   --output DIRECTORY              Directory to store results in (defaults to PROJECT/backtests/TIMESTAMP)
   -d, --detach                    Run the backtest in a detached Docker container and return immediately
-  --debug [pycharm|ptvsd|vsdbg|rider|local-platform]
+  --debug [pycharm|ptvsd|debugpy|vsdbg|rider|local-platform]
                                   Enable a certain debugging method (see --help for more information)
   --data-provider-historical [Interactive Brokers|Oanda|Bitfinex|Coinbase Advanced Trade|Binance|Kraken|IQFeed|Polygon|FactSet|IEX|AlphaVantage|CoinApi|ThetaData|QuantConnect|Local|Terminal Link|Bybit]
                                   Update the Lean configuration file to retrieve data from the given historical provider

lean/commands/backtest.py

@@ -234,7 +234,7 @@ def _migrate_csharp_csproj(project_dir: Path) -> None:
               default=False,
               help="Run the backtest in a detached Docker container and return immediately")
 @option("--debug",
-              type=Choice(["pycharm", "ptvsd", "vsdbg", "rider", "local-platform"], case_sensitive=False),
+              type=Choice(["pycharm", "ptvsd", "debugpy", "vsdbg", "rider", "local-platform"], case_sensitive=False),
               help="Enable a certain debugging method (see --help for more information)")
 @option("--data-provider-historical",
               type=Choice([dp.get_name() for dp in cli_data_downloaders], case_sensitive=False),
@@ -331,6 +331,11 @@ def backtest(project: Path,
     elif debug == "ptvsd":
         debugging_method = DebuggingMethod.PTVSD
         _migrate_python_vscode(algorithm_file.parent)
+        logger.warn("The PTVSD debugging method is deprecated and might be removed in a future version of LEAN. "
+                    "Consider using DebugPy instead.")
+    elif debug == "debugpy":
+        debugging_method = DebuggingMethod.DebugPy
+        _migrate_python_vscode(algorithm_file.parent)
     elif debug == "vsdbg":
         debugging_method = DebuggingMethod.VSDBG
         _migrate_csharp_vscode(algorithm_file.parent)

lean/components/docker/lean_runner.py

@@ -107,8 +107,8 @@ def run_lean(self,
         # Add known additional run options from the extra docker config
         self.parse_extra_docker_config(run_options, extra_docker_config)
 
-        # Set up PTVSD debugging
-        if debugging_method == DebuggingMethod.PTVSD:
+        # Set up PTVSD or DebugPy debugging
+        if debugging_method == DebuggingMethod.PTVSD or debugging_method == DebuggingMethod.DebugPy:
             run_options["ports"]["5678"] = "5678"
 
         # Set up VSDBG debugging

lean/models/utils.py

@@ -22,7 +22,8 @@ class DebuggingMethod(Enum):
     PTVSD = 2
     VSDBG = 3
     Rider = 4
-    LocalPlatform  = 5
+    LocalPlatform = 5
+    DebugPy = 6
 
     def get_internal_name(self) -> str:
         """Returns the LEAN debugging method that should be used for the current enum member.
@@ -32,6 +33,7 @@ def get_internal_name(self) -> str:
         return {
             DebuggingMethod.PyCharm: "PyCharm",
             DebuggingMethod.PTVSD: "PTVSD",
+            DebuggingMethod.DebugPy: "DebugPy",
             DebuggingMethod.LocalPlatform: "DebugPy" # QC -> DebugPy, If its Python it uses DebugPy, if its C# LEAN safely ignores DebugPy
         }.get(self, "LocalCmdline")
 

tests/commands/test_backtest.py

@@ -283,6 +283,8 @@ def _ensure_rider_debugger_config_files_exist(project_dir: Path) -> None:
                                                     ("PTVSD", DebuggingMethod.PTVSD),
                                                     ("vsdbg", DebuggingMethod.VSDBG),
                                                     ("VSDBG", DebuggingMethod.VSDBG),
+                                                    ("debugpy", DebuggingMethod.DebugPy),
+                                                    ("DebugPy", DebuggingMethod.DebugPy),
                                                     ("rider", DebuggingMethod.Rider),
                                                     ("Rider", DebuggingMethod.Rider)])
 def test_backtest_passes_correct_debugging_method_to_lean_runner(value: str, debugging_method: DebuggingMethod) -> None:
@@ -348,7 +350,8 @@ def test_backtest_auto_updates_outdated_python_pycharm_debug_config() -> None:
     assert workspace_xml.find(".//mapping[@remote-root='/Lean/Launcher/bin/Debug']") is None
 
 
-def test_backtest_auto_updates_outdated_python_vscode_debug_config() -> None:
+@pytest.mark.parametrize("value", ["ptvsd", "debugpy"])
+def test_backtest_auto_updates_outdated_python_vscode_debug_config(value) -> None:
     create_fake_lean_cli_directory()
 
     lean_config_manager = container.lean_config_manager
@@ -380,7 +383,7 @@ def test_backtest_auto_updates_outdated_python_vscode_debug_config() -> None:
         ]
     }))
 
-    result = CliRunner().invoke(lean, ["backtest", "Python Project", "--debug", "ptvsd"])
+    result = CliRunner().invoke(lean, ["backtest", "Python Project", "--debug", value])
 
     assert result.exit_code == 0