use 3.7-compatible path unlink syntax (#77)

Author: mathematicalmichael

.github/workflows/main.yml

@@ -99,7 +99,7 @@ jobs:
     name: texless cli examples
     strategy:
       matrix:
-        python-version: ["3.9"]
+        python-version: ["3.7"]
     runs-on: ubuntu-latest
     steps:
       - name: Checkout

src/mud/plot.py

@@ -29,7 +29,9 @@ def _check_latex():
         plt.plot([0], [1], label=r"$a_\text{foo} = \lambda$")
         plt.plot([0, 1], [1, 2], label="Something")
         plt.savefig(str(path), bbox_inches="tight")
-        path.unlink(missing_ok=True)
+        # For Python 3.7 compatibility
+        if path.exists():
+            path.unlink()
         _logger.info("USING TEX")
         return True
     except (RuntimeError, FileNotFoundError):