Add os.path functionality like in CPython

ThomasFarstrike · ThomasFarstrike · commit 58363e45faa4 · 2026-05-26T09:15:21.000+02:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -16,7 +16,7 @@ Frameworks:
 - SharedPreferences: avoid writing default-only configs at boot and prune empty config dirs/files
 
 OS:
-- Add path library
+- Add os.path functionality like in CPython
 - c_mpos/quirc: fix compilation warnings
 - Simplify focusgroup handling
 - Disable unused OS facilities (FreeRTOS internals, tracing, INFO logging, broken GIF, Pinyin IME, LVGL window, BMP) to reduce build size by 109KiB
diff --git a/internal_filesystem/apps/com.micropythonos.showfonts/assets/showfonts.py b/internal_filesystem/apps/com.micropythonos.showfonts/assets/showfonts.py
@@ -9,12 +9,9 @@ def onCreate(self):
         screen = lv.obj()
         screen.set_flex_flow(lv.FLEX_FLOW.COLUMN)
 
-        import path
-        print(f"{__file__}") # apps/com.micropythonos.showfonts/assets/showfonts.py
-        print(f"{path.abspath(__file__)}")
-        print(f"{path.dirname(path.abspath(__file__))}")
-        d = path.dirname(path.abspath(__file__))
-        self._ttf_font = FontManager.getFont(size=42, ttf=f"M:{d}/Rancourt-SmallCaps.ttf")
+        import os
+        mydir = os.path.dirname(os.path.abspath(__file__))
+        self._ttf_font = FontManager.getFont(size=42, ttf=f"M:{mydir}/Rancourt-SmallCaps.ttf")
 
         self.addAllFontsTitles(screen)
         self.addAllGlyphs(screen)
@@ -40,7 +37,7 @@ def addAllFontsTitles(self, screen):
             bitcoin_symbol_in_circle = "\uf379"
             thumbs_up_symbol = "\uf164"
             diacritics = "&aelig; &oslash; &aring; &AElig; &Oslash; &Aring;"
-            supported_latin = "&AElig; &aelig; &ETH; &eth; &szlig; &THORN; &thorn; 7"
+            supported_latin = "&AElig; &aelig; &ETH; &eth; &szlig; &THORN; &thorn;"
             title.set_text(
                 "{}: ABC 123 xyz &#10084;&#65039; &#9786;&#65039; !@#$%^&*( {} {} &#8383; {} {} {} &#20015; &#20016; {} {}".format(
                     name,
diff --git a/internal_filesystem/lib/README.md b/internal_filesystem/lib/README.md
@@ -11,3 +11,4 @@ This /lib folder contains:
 - https://github.com/micropython/micropython-lib/blob/master/python-stdlib/shutil/shutil.py version 0.0.5 # for rmtree()
 - https://github.com/micropython/micropython-lib/blob/master/python-stdlib/unittest/unittest/__init__.py  version 0.10.4 # for testing (also on-device)
 - https://github.com/micropython/micropython-lib/blob/master/python-stdlib/pathlib/pathlib.py version 0.0.1 # for Path()
+- https://github.com/micropython/micropython-lib/blob/master/python-stdlib/os-path/os/path.py version 0.2.0 # for os.path (monkeypatched)
diff --git a/internal_filesystem/lib/mpos/main.py b/internal_filesystem/lib/mpos/main.py
@@ -322,6 +322,14 @@ def change_task_handler(period_ms=1):
 mpos.ui.change_task_handler = change_task_handler # make it accessible
 mpos.ui.change_task_handler()
 
+# Patch (u)os module so os.path works like in CPython - do this before starting apps
+import sys
+import os as _os
+import path as _path
+_os.path = _path
+sys.modules["os"] = _os
+sys.modules["uos"] = _os
+
 try:
     from mpos.net.wifi_service import WifiService
     _thread.stack_size(TaskManager.good_stack_size())
