test_parse.py

with open("test_config.yaml") as f:
    lines = f.read().splitlines()

insideConfigBlock = False
useExtension = False

for line in lines:
    trimmed = line.strip()

    if trimmed.startswith("flutter_string_extractor:"):
        insideConfigBlock = True
        continue

    if insideConfigBlock and line and not line.startswith(" ") and not line.startswith("\t") and not line.startswith("#"):
        insideConfigBlock = False

    if insideConfigBlock:
        if trimmed.startswith("use_extension:"):
            # Kotlin: useExtension = trimmed.substringAfter(":").trim().lowercase() == "true"
            val = trimmed.split(":", 1)[1].strip().lower()
            useExtension = (val == "true")

print(useExtension)