nikie commented on a change in pull request #15901:
URL: https://github.com/apache/beam/pull/15901#discussion_r746078453
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File path: sdks/python/apache_beam/io/textio.py
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@@ -362,6 +391,15 @@ def _is_self_overlapping(delimiter):
return True
return False
+ def _is_escaped(self, read_buffer, position):
+ # Returns True if byte at position is preceded with an odd number
+ # of escapechar bytes or False if preceded by 0 or even escapes
+ # (the even number means that all the escapes are escaped themselves).
+ for current_pos in reversed(range(-1, position)):
+ if read_buffer.data[current_pos:current_pos + 1] != self._escapechar:
Review comment:
It looks like the last line `return False` cannot be reached, because we
loop until first non-escape or the start of buffer and always return. That's
the problem...
It only passes Pylint validation because `inconsistent-return-statements` is
disabled, but can confuse readers.
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