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prefect.utilities.hashing

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Functions

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stable_hash

stable_hash(*args: Union[str, bytes]) -> str

Given some arguments, produces a stable 64-bit hash of their contents.

Supports bytes and strings. Strings will be UTF-8 encoded.

Args:

• *args: Items to include in the hash.
• hash_algo: Hash algorithm from hashlib to use.

Returns:

• A hex hash.

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file_hash

file_hash(path: str, hash_algo: Callable[..., Any] = _md5) -> str

Given a path to a file, produces a stable hash of the file contents.

Args:

• path: the path to a file
• hash_algo: Hash algorithm from hashlib to use.

Returns:

• a hash of the file contents

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hash_objects

hash_objects(*args: Any, **kwargs: Any) -> Optional[str]

Attempt to hash objects by dumping to JSON or serializing with cloudpickle.

Args:

• *args: Positional arguments to hash
• hash_algo: Hash algorithm to use
• raise_on_failure: If True, raise exceptions instead of returning None
• **kwargs: Keyword arguments to hash

Returns:

• A hash string or None if hashing failed

Raises:

• HashError: If objects cannot be hashed and raise_on_failure is True