_lazy_sha1() — flask Function Reference

Architecture documentation for the _lazy_sha1() function in sessions.py from the flask codebase.

Function python ApplicationCore Scaffolding

Entity Profile

ApplicationCore→ Scaffolding→ _lazy_sha1() — flask Function Reference

Dependency Diagram

graph TD
  61c7dd61_9908_2a1c_59ec_4cc2ae346c0e["_lazy_sha1()"]
  f793a407_79ea_667a_f29e_29bbf57c781f["sessions.py"]
  61c7dd61_9908_2a1c_59ec_4cc2ae346c0e -->|defined in| f793a407_79ea_667a_f29e_29bbf57c781f
  style 61c7dd61_9908_2a1c_59ec_4cc2ae346c0e fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/flask/sessions.py lines 290–295

def _lazy_sha1(string: bytes = b"") -> t.Any:
    """Don't access ``hashlib.sha1`` until runtime. FIPS builds may not include
    SHA-1, in which case the import and use as a default would fail before the
    developer can configure something else.
    """
    return hashlib.sha1(string)