Metadata Class

The muspy.Metadata class is a container for metadata.

Attributes	Description	Type	Default
schema_version	Schema version	str	‘0.0’
title	Song title	str
creators	Creators(s) of the song	list of str	[]
copyright	Copyright notice	str
collection	Name of the collection	str
source_filename	Name of the source file	str
source_format	Format of the source file	str

class muspy.Metadata(schema_version='0.1', title=None, creators=None, copyright=None, collection=None, source_filename=None, source_format=None)

A container for metadata.

schema_version

Schema version.

Type

str, default: muspy.DEFAULT_SCHEMA_VERSION

title

Song title.

Type

str, optional

creators

Creator(s) of the song.

Type

list of str, optional

copyright

Copyright notice.

Type

str, optional

collection

Name of the collection.

Type

str, optional

source_filename

Name of the source file.

Type

str, optional

source_format

Format of the source file.

Type

str, optional

adjust_time(func, attr=None, recursive=True)

Adjust the timing of time-stamped objects.

Parameters

• func (callable) – The function used to compute the new timing from the old timing, i.e., new_time = func(old_time).

• attr (str, optional) – Attribute to adjust. Defaults to adjust all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Return type

Object itself.

copy()

Return a shallow copy of the object.

This is equivalent to copy.copy(self)().

Returns

Return type

Shallow copy of the object.

deepcopy()

Return a deep copy of the object.

This is equivalent to copy.deepcopy(self)()

Returns

Return type

Deep copy of the object.

fix_type(attr=None, recursive=True)

Fix the types of attributes.

Parameters

• attr (str, optional) – Attribute to adjust. Defaults to adjust all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Return type

Object itself.

classmethod from_dict(dict_, strict=False, cast=False)

Return an instance constructed from a dictionary.

Instantiate an object whose attributes and the corresponding values are given as a dictionary.

Parameters

• dict (dict or mapping) – A dictionary that stores the attributes and their values as key-value pairs, e.g., {“attr1”: value1, “attr2”: value2}.

• strict (bool, default: False) – Whether to raise errors for invalid input types.

• cast (bool, default: False) – Whether to cast types.

Returns

Return type

Constructed object.

is_valid(attr=None, recursive=True)

Return True if an attribute has a valid type and value.

This will recursively apply to an attribute’s attributes.

Parameters

• attr (str, optional) – Attribute to validate. Defaults to validate all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Whether the attribute has a valid type and value.

Return type

bool

See also

muspy.Base.validate()

Raise an error if an attribute has an invalid type or value.

muspy.Base.is_valid_type()

Return True if an attribute is of a valid type.

is_valid_type(attr=None, recursive=True)

Return True if an attribute is of a valid type.

This will apply recursively to an attribute’s attributes.

Parameters

• attr (str, optional) – Attribute to validate. Defaults to validate all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Whether the attribute is of a valid type.

Return type

bool

See also

muspy.Base.validate_type()

Raise an error if a certain attribute is of an invalid type.

muspy.Base.is_valid()

Return True if an attribute has a valid type and value.

pretty_str(skip_missing=True)

Return the attributes as a string in a YAML-like format.

Parameters

skip_missing (bool, default: True) – Whether to skip attributes with value None or those that are empty lists.

Returns

Stored data as a string in a YAML-like format.

Return type

str

See also

muspy.Base.print()

Print the attributes in a YAML-like format.

print(skip_missing=True)

Print the attributes in a YAML-like format.

Parameters

skip_missing (bool, default: True) – Whether to skip attributes with value None or those that are empty lists.

See also

muspy.Base.pretty_str()

Return the the attributes as a string in a YAML-like format.

to_ordered_dict(skip_missing=True, deepcopy=True)

Return the object as an OrderedDict.

Return an ordered dictionary that stores the attributes and their values as key-value pairs.

Parameters

• skip_missing (bool, default: True) – Whether to skip attributes with value None or those that are empty lists.

• deepcopy (bool, default: True) – Whether to make deep copies of the attributes.

Returns

A dictionary that stores the attributes and their values as key-value pairs, e.g., {“attr1”: value1, “attr2”: value2}.

Return type

OrderedDict

validate(attr=None, recursive=True)

Raise an error if an attribute has an invalid type or value.

This will apply recursively to an attribute’s attributes.

Parameters

• attr (str, optional) – Attribute to validate. Defaults to validate all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Return type

Object itself.

See also

muspy.Base.is_valid()

Return True if an attribute has a valid type and value.

muspy.Base.validate_type()

Raise an error if an attribute is of an invalid type.

validate_type(attr=None, recursive=True)

Raise an error if an attribute is of an invalid type.

This will apply recursively to an attribute’s attributes.

Parameters

• attr (str, optional) – Attribute to validate. Defaults to validate all attributes.

• recursive (bool, default: True) – Whether to apply recursively.

Returns

Return type

Object itself.

See also

muspy.Base.is_valid_type()

Return True if an attribute is of a valid type.

muspy.Base.validate()

Raise an error if an attribute has an invalid type or value.