Merge pull request #1 from pavelanni/fix-pythonpath

fix empty PYTHONPATH issue

Author: ettore-galli

.gitignore

@@ -157,4 +157,9 @@ cython_debug/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
+#.idea/
+
+# Pyenv version setting
+.python-version
+# VS Code settings
+settings.json

thonnycontrib/black_formatter/__init__.py

@@ -1,10 +1,9 @@
+import os
 import subprocess
 import sys
-import os
-
 from collections import namedtuple
-
 from tkinter.messagebox import showinfo
+
 from thonny import get_workbench
 from thonny.running import get_front_interpreter_for_subprocess
 
@@ -45,7 +44,7 @@ def prepare_run_environment(self):
         binfolder = plugins_folder.replace("lib/python/site-packages", "bin")
 
         os.environ["PYTHONPATH"] = plugins_folder + (
-            ":" + os.environ["PYTHONPATH"] if os.environ["PYTHONPATH"] else ""
+            ":" + os.environ["PYTHONPATH"] if "PYTHONPATH" in os.environ.keys() else ""
         )
         os.environ["PATH"] = binfolder + ":" + plugins_folder + ":" + os.environ["PATH"]