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Coding workflows · Restricted backtick block extraction
03
A concrete starting point
Extract column-zero triple-backtick blocks from text of at most 4096 characters with optional ASCII language labels. Test empty blocks and normalized line breaks, reject an unclosed block and leave unsupported Markdown forms uninterpreted without executing code.
Define the change
Describe the input, expected output and boundaries that must stay intact.
Inspect the work
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Check the outcome
Compare actual behavior with the expected result. If a check fails, investigate it before applying more changes.
Restricted backtick block extraction
A concrete starting point
import re
def fenced_blocks(text):
if type(text) is not str or len(text) > 4096:
raise ValueError("fence.input")
blocks, body, language = [], None, None
for line in text.splitlines():
if body is None:
opening = re.fullmatch(r"```([A-Za-z0-9_-]*)", line)
if opening:
body, language = [], opening[1]
elif line == "```":
blocks.append((language, "\n".join(body)))
body = None
else:
body.append(line)
if body is not None:
raise ValueError("fence.unclosed")
return blocks
The example is a starting point for a real project, not a claim that generated code is already tested. Adjust paths, dependencies and expected behavior to match your application.