Merge pull request #5840 from SomberNight/201912_py38_win_dlls_source

windows: when running from source, with py3.8+, load DLLs from '.dlls'

.gitignore

@@ -16,6 +16,7 @@ bin/
 .idea
 .mypy_cache
 .vscode
+.dlls
 
 # icons
 electrum/gui/kivy/theming/light-0.png

run_electrum

@@ -51,6 +51,13 @@ os.environ['KIVY_DATA_DIR'] = os.path.abspath(os.path.dirname(__file__)) + '/ele
 if is_local or is_android:
     sys.path.insert(0, os.path.join(script_dir, 'packages'))
 
+# when running from source, on Windows, also search for DLLs in '.dlls' top-level folder
+if is_local and os.name == 'nt':
+    dll_dir = os.path.join(os.path.dirname(__file__), '.dlls')
+    if os.path.exists(dll_dir):
+        if hasattr(os, 'add_dll_directory'):  # requires python 3.8+
+            os.add_dll_directory(dll_dir)
+
 
 def check_imports():
     # pure-python dependencies need to be imported here for pyinstaller