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Coding workflows · Ordered URL query pairs
03
A concrete starting point
Append one URL query pair while preserving repeated keys, blank values and their original order. Distinguish a literal plus encoded as %2B from a space and reject malformed percent escapes or invalid UTF-8.
Define the change
Describe the input, expected output and boundaries that must stay intact.
Inspect the work
Review the proposed edits and any commands before relying on their result.
Check the outcome
Compare actual behavior with the expected result. If a check fails, investigate it before applying more changes.
Ordered URL query pairs
A concrete starting point
import re
from urllib.parse import parse_qsl, urlencode
def append_query(query, key, value):
if any(type(x) is not str for x in (query, key, value)):
raise ValueError("query.type")
if re.search(r"%(?![0-9A-Fa-f]{2})", query):
raise ValueError("query.escape")
pairs = parse_qsl(query, keep_blank_values=True,
strict_parsing=True, errors="strict", max_num_fields=1000)
return urlencode([*pairs, (key, value)])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.