Modified python version check to accommodate for legacy version styles (#13420)

Co-authored-by: Carlos Mocholí <[email protected]>

Author: martinosorb

src/pytorch_lightning/CHANGELOG.md

@@ -283,6 +283,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Fixed `estimated_stepping_batches` requiring distributed comms in `configure_optimizers` for the `DeepSpeedStrategy` ([#13350](https://github.com/PyTorchLightning/pytorch-lightning/pull/13350))
 
 
+- Fixed bug with Python version check that prevented use with development versions of Python ([#13420](https://github.com/PyTorchLightning/pytorch-lightning/pull/13420))
+
+
 - Fixed Model Summary when using DeepSpeed Stage 3 ([#13427](https://github.com/PyTorchLightning/pytorch-lightning/pull/13427))
 
 

src/pytorch_lightning/utilities/imports.py

@@ -123,7 +123,7 @@ def __repr__(self) -> str:
 
 _IS_WINDOWS = platform.system() == "Windows"
 _IS_INTERACTIVE = hasattr(sys, "ps1")  # https://stackoverflow.com/a/64523765
-_PYTHON_GREATER_EQUAL_3_8_0 = Version(platform.python_version()) >= Version("3.8.0")
+_PYTHON_GREATER_EQUAL_3_8_0 = (sys.version_info.major, sys.version_info.minor) >= (3, 8)
 _TORCH_GREATER_EQUAL_1_9_1 = _compare_version("torch", operator.ge, "1.9.1")
 _TORCH_GREATER_EQUAL_1_10 = _compare_version("torch", operator.ge, "1.10.0")
 _TORCH_LESSER_EQUAL_1_10_2 = _compare_version("torch", operator.le, "1.10.2")