minor cleanup

implementations/Python/misc/ojoy/utils/snippets.py

@@ -0,0 +1,40 @@
+from collections import namedtuple
+from re import compile as RE
+
+
+Snippet = namedtuple('Snippet', 'sha offset length')
+
+
+pat = (
+    '{'
+    '\s*'
+    '(?P<sha>[a-f0-9]+)'
+    '\s+'
+    '(?P<offset>\d+)'
+    '\s+'
+    '(?P<length>\d+)'
+    '\s*'
+    '}'
+    )
+
+
+_PAT = RE(pat)
+
+
+def to_string(snip):
+    return _ts(*snip)
+
+
+def _ts(sha, offset, length):
+    return f'{{{sha.decode("ascii")} {offset} {length}}}'
+
+
+def from_string(text):
+    m = _PAT.match(text)
+    if not m:
+        raise ValueError
+    return _fs(**m.groupdict())
+
+
+def _fs(sha, offset, length):
+    return Snippet(sha.encode('ascii'), int(offset), int(length))