tests: Format all Python code with black, except tests in basics subdir.

This adds the Python files in the tests/ directory to be formatted with
./tools/codeformat.py.  The basics/ subdirectory is excluded for now so we
aren't changing too much at once.

In a few places `# fmt: off`/`# fmt: on` was used where the code had
special formatting for readability or where the test was actually testing
the specific formatting.

1 files changed, 7 insertions, 6 deletions

diff --git a/tests/extmod/ujson_dump_iobase.py b/tests/extmod/ujson_dump_iobase.py
index 51d507cd1..7ecf23afb 100644
--- a/tests/extmod/ujson_dump_iobase.py
+++ b/tests/extmod/ujson_dump_iobase.py
@@ -7,27 +7,28 @@ except ImportError:
     try:
         import io, json
     except ImportError:
-        print('SKIP')
+        print("SKIP")
         raise SystemExit
 
-if not hasattr(io, 'IOBase'):
-    print('SKIP')
+if not hasattr(io, "IOBase"):
+    print("SKIP")
     raise SystemExit
 
 
 # a user stream that only has the write method
 class S(io.IOBase):
     def __init__(self):
-        self.buf = ''
+        self.buf = ""
+
     def write(self, buf):
         if type(buf) == bytearray:
             # uPy passes a bytearray, CPython passes a str
-            buf = str(buf, 'ascii')
+            buf = str(buf, "ascii")
         self.buf += buf
         return len(buf)
 
 
 # dump to the user stream
 s = S()
-json.dump([123, {}], s) 
+json.dump([123, {}], s)
 print(s.buf)