Fix: 修复MicroPython MixGoAI和Microbit下一些py异常同时格式化代码

boards/default/micropython_k210_mixgoai/build/lib/mixly_tool.py

@@ -1,25 +1,27 @@
 import hashlib
 import os
 
+
 def sha_file(f):
     if f not in set(os.listdir(".")):
-        return 'None:::sha_file_end'
+        return "None:::sha_file_end"
     else:
         sha = hashlib.sha256()
-        with open(f, encoding='utf-8') as fd:
+        with open(f, encoding="utf-8") as fd:
             file_buffer = fd.read(128).encode("utf-8")
             while len(file_buffer) > 0:
                 sha.update(file_buffer)
                 file_buffer = fd.read(128).encode("utf-8")
             h = sha.digest()
-            return ''.join(['%.2x' % i for i in h]) + ":::sha_file_end"
+            return "".join(["%.2x" % i for i in h]) + ":::sha_file_end"
+
 
 def reload(mod):
     import sys
+
     mod_name = mod.__name__
     try:
         del sys.modules[mod_name]
         __import__(mod_name)
     except:
         pass
-