Decode a YAML scalar (limited subset: null/bool/int/float/str).
(s: str)
| 36 | |
| 37 | |
| 38 | def yaml_decode_scalar(s: str): |
| 39 | """Decode a YAML scalar (limited subset: null/bool/int/float/str).""" |
| 40 | t = s.strip() |
| 41 | if t == "" or t == "~" or t == "null": |
| 42 | return None |
| 43 | if t == "true": |
| 44 | return True |
| 45 | if t == "false": |
| 46 | return False |
| 47 | if (t.startswith('"') and t.endswith('"')) or (t.startswith("'") and t.endswith("'")): |
| 48 | # JSON-compatible double-quote unescape; single-quoted just strips quotes |
| 49 | if t.startswith('"'): |
| 50 | return json.loads(t) |
| 51 | return t[1:-1].replace("''", "'") |
| 52 | # try int |
| 53 | if re.match(r"^-?\d+$", t): |
| 54 | return int(t) |
| 55 | # try float |
| 56 | if re.match(r"^-?\d+\.\d+$", t): |
| 57 | return float(t) |
| 58 | # flow list: [a, b, c] |
| 59 | if t.startswith("[") and t.endswith("]"): |
| 60 | inner = t[1:-1].strip() |
| 61 | if not inner: |
| 62 | return [] |
| 63 | # naive split on commas not inside brackets/quotes |
| 64 | out = [] |
| 65 | depth = 0 |
| 66 | cur = "" |
| 67 | for c in inner: |
| 68 | if c in "[\"'": |
| 69 | depth += 1 |
| 70 | elif c in "]\"'": |
| 71 | depth -= 1 |
| 72 | if c == "," and depth == 0: |
| 73 | out.append(yaml_decode_scalar(cur)) |
| 74 | cur = "" |
| 75 | else: |
| 76 | cur += c |
| 77 | if cur.strip(): |
| 78 | out.append(yaml_decode_scalar(cur)) |
| 79 | return out |
| 80 | return t |
| 81 | |
| 82 | |
| 83 | def parse_yaml(text: str): |