Guides
Redaction
Replace detected PII with type-based labels.
Redaction
Use redact() to replace each finding with its type label in brackets. This preserves the type of PII while hiding the actual value.
Basic redaction
from fastpii import FastPII, DEFAULT_PRIORITY
from fastpii.countries.cz import CzechPack
engine = FastPII(priority=DEFAULT_PRIORITY)
engine.register(CzechPack())
text = "Email: jan.novak@example.cz, RČ: 8001011238"
result = engine.redact(text)
print(result)Output:
Email: [EMAIL], RČ: [RODNE_CISLO]Using TransformationEngine directly
from fastpii.core.transform import TransformationEngine, RedactStrategy
result = engine.detect(text)
redacted = TransformationEngine.apply(result, RedactStrategy())
print(redacted)Multi-region redaction
from fastpii import FastPII, DEFAULT_PRIORITY
from fastpii.countries.cz import CzechPack
from fastpii.countries.pl import PolishPack
from fastpii.countries.de import GermanPack
engine = FastPII(priority=DEFAULT_PRIORITY)
engine.register_many([CzechPack(), PolishPack(), GermanPack()])
text = "RČ: 8001011238, PESEL: 44051401458, Steuer-ID: 86095742719"
result = engine.redact(text)
print(result)Output:
RČ: [RODNE_CISLO], PESEL: [PESEL], Steuer-ID: [STEUER_ID]When to use redaction
Redaction is best when:
- You need to know what type of PII was detected
- Building audit logs that record PII types without values
- Preparing reports where PII type context matters