def filter_bibolamazifile(self, bibolamazifile):
logger.debug("Getting list of used citations from %s.aux." %(self.jobname))
citations = auxfile.get_all_auxfile_citations(self.jobname, bibolamazifile, self.name(), self.search_dirs,
return_set=True);
logger.longdebug("set of citations: %r"%(citations))
bibdata = bibolamazifile.bibliographyData()
newentries = OrderedCaseInsensitiveDict()
for key,entry in bibdata.entries.iteritems():
if key in citations:
newentries[key] = entry
logger.longdebug("the new database has entries %r" %(newentries.keys()))
bibolamazifile.setEntries(newentries.iteritems())
return
class BibliographyData(object):
def __init__(self, entries=None, preamble=None, wanted_entries=None, min_crossrefs=2):
"""
A :py:class:`.BibliographyData` object contains a dictionary of bibliography
entries referenced by their keys.
Each entry represented by an :py:class:`.Entry` object.
Additionally, :py:class:`.BibliographyData` may contain a LaTeX
preamble defined by ``@PREAMBLE`` commands in the BibTeX file.
"""
self.entries = OrderedCaseInsensitiveDict()
'''A dictionary of bibliography entries referenced by their keys.
The dictionary is case insensitive:
>>> bib_data = parse_string("""
... @ARTICLE{gnats,
... author = {L[eslie] A. Aamport},
... title = {The Gnats and Gnus Document Preparation System},
... }
... """, 'bibtex')
>>> bib_data.entries['gnats'] == bib_data.entries['GNATS']
True
'''
self.crossref_count = CaseInsensitiveDefaultDict(int)
self.min_crossrefs = min_crossrefs
self._preamble = []
if wanted_entries is not None:
self.wanted_entries = CaseInsensitiveSet(wanted_entries)
self.citations = CaseInsensitiveSet(wanted_entries)
else:
self.wanted_entries = None
self.citations = CaseInsensitiveSet()
if entries:
if isinstance(entries, Mapping):
entries = entries.iteritems()
for (key, entry) in entries:
self.add_entry(key, entry)
if preamble:
self._preamble.extend(preamble)
def __eq__(self, other):
if not isinstance(other, BibliographyData):
return super(BibliographyData, self) == other
return (
self.entries == other.entries
and self._preamble == other._preamble
)
def __repr__(self):
return 'BibliographyData(entries={entries}, preamble={preamble})'.format(
entries=repr(self.entries),
preamble=repr(self._preamble),
)
def add_to_preamble(self, *values):
self._preamble.extend(values)
@property
def preamble(self):
r'''
LaTeX preamble.
>>> bib_data = parse_string(r"""
... @PREAMBLE{"\newcommand{\noopsort}[1]{}"}
... """, 'bibtex')
>>> print bib_data.preamble
\newcommand{\noopsort}[1]{}
.. versionadded:: 0.19
Earlier versions used :py:meth:`.get_preamble()`, which is now deprecated.
'''
return ''.join(self._preamble)
@deprecated('0.19', 'use BibliographyData.preamble instead')
def get_preamble(self):
"""
.. deprecated:: 0.19
Use :py:attr:`.preamble` instead.
"""
return self.preamble
def want_entry(self, key):
return (
self.wanted_entries is None
or key in self.wanted_entries
or '*' in self.wanted_entries
)
def get_canonical_key(self, key):
if key in self.citations:
return self.citations.get_canonical_key(key)
else:
return key
def add_entry(self, key, entry):
if not self.want_entry(key):
return
if key in self.entries:
report_error(BibliographyDataError('repeated bibliograhpy entry: %s' % key))
return
entry.collection = self
entry.key = self.get_canonical_key(key)
self.entries[entry.key] = entry
try:
crossref = entry.fields['crossref']
except KeyError:
pass
else:
if self.wanted_entries is not None:
self.wanted_entries.add(crossref)
def add_entries(self, entries):
for key, entry in entries:
self.add_entry(key, entry)
def _get_crossreferenced_citations(self, citations, min_crossrefs):
"""
Get cititations not cited explicitly but referenced by other citations.
>>> from pybtex.database import Entry
>>> data = BibliographyData({
... 'main_article': Entry('article', {'crossref': 'xrefd_arcicle'}),
... 'xrefd_arcicle': Entry('article'),
... })
>>> list(data._get_crossreferenced_citations([], min_crossrefs=1))
[]
>>> list(data._get_crossreferenced_citations(['main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data._get_crossreferenced_citations(['Main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data._get_crossreferenced_citations(['main_article'], min_crossrefs=2))
[]
>>> list(data._get_crossreferenced_citations(['xrefd_arcicle'], min_crossrefs=1))
[]
>>> data2 = BibliographyData(data.entries, wanted_entries=data.entries.keys())
>>> list(data2._get_crossreferenced_citations([], min_crossrefs=1))
[]
>>> list(data2._get_crossreferenced_citations(['main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data2._get_crossreferenced_citations(['Main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data2._get_crossreferenced_citations(['main_article'], min_crossrefs=2))
[]
>>> list(data2._get_crossreferenced_citations(['xrefd_arcicle'], min_crossrefs=1))
[]
>>> list(data2._get_crossreferenced_citations(['xrefd_arcicle'], min_crossrefs=1))
[]
"""
crossref_count = CaseInsensitiveDefaultDict(int)
citation_set = CaseInsensitiveSet(citations)
for citation in citations:
try:
entry = self.entries[citation]
crossref = entry.fields['crossref']
except KeyError:
continue
try:
crossref_entry = self.entries[crossref]
except KeyError:
report_error(BibliographyDataError(
'bad cross-reference: entry "{key}" refers to '
'entry "{crossref}" which does not exist.'.format(
key=citation, crossref=crossref,
)
))
continue
canonical_crossref = crossref_entry.key
crossref_count[canonical_crossref] += 1
if crossref_count[canonical_crossref] >= min_crossrefs and canonical_crossref not in citation_set:
citation_set.add(canonical_crossref)
yield canonical_crossref
def _expand_wildcard_citations(self, citations):
"""
Expand wildcard citations (\citation{*} in .aux file).
>>> from pybtex.database import Entry
>>> data = BibliographyData((
... ('uno', Entry('article')),
... ('dos', Entry('article')),
... ('tres', Entry('article')),
... ('cuatro', Entry('article')),
... ))
>>> list(data._expand_wildcard_citations([]))
[]
>>> list(data._expand_wildcard_citations(['*']))
['uno', 'dos', 'tres', 'cuatro']
>>> list(data._expand_wildcard_citations(['uno', '*']))
['uno', 'dos', 'tres', 'cuatro']
>>> list(data._expand_wildcard_citations(['dos', '*']))
['dos', 'uno', 'tres', 'cuatro']
>>> list(data._expand_wildcard_citations(['*', 'uno']))
['uno', 'dos', 'tres', 'cuatro']
>>> list(data._expand_wildcard_citations(['*', 'DOS']))
['uno', 'dos', 'tres', 'cuatro']
"""
citation_set = CaseInsensitiveSet()
for citation in citations:
if citation == '*':
for key in self.entries:
if key not in citation_set:
citation_set.add(key)
yield key
else:
if citation not in citation_set:
citation_set.add(citation)
yield citation
def add_extra_citations(self, citations, min_crossrefs):
expanded_citations = list(self._expand_wildcard_citations(citations))
crossrefs = list(self._get_crossreferenced_citations(expanded_citations, min_crossrefs))
return expanded_citations + crossrefs
def to_string(self, bib_format, **kwargs):
"""
Return the data as a unicode string in the given format.
:param bib_format: Data format ("bibtex", "yaml", etc.).
.. versionadded:: 0.19
"""
writer = find_plugin('pybtex.database.output', bib_format)(**kwargs)
return writer.to_string(self)
def to_bytes(self, bib_format, **kwargs):
"""
Return the data as a byte string in the given format.
:param bib_format: Data format ("bibtex", "yaml", etc.).
.. versionadded:: 0.19
"""
writer = find_plugin('pybtex.database.output', bib_format)(**kwargs)
return writer.to_bytes(self)
def to_file(self, file, bib_format=None, **kwargs):
"""
Save the data to a file.
:param file: A file name or a file-like object.
:param bib_format: Data format ("bibtex", "yaml", etc.).
If not specified, Pybtex will try to guess by the file name.
.. versionadded:: 0.19
"""
if isinstance(file, basestring):
filename = file
else:
filename = getattr(file, 'name', None)
writer = find_plugin('pybtex.database.output', bib_format, filename=filename)(**kwargs)
return writer.write_file(self, file)
def lower(self):
u'''
Return another :py:class:`.BibliographyData` with all identifiers converted to lowercase.
>>> data = parse_string("""
... @BOOK{Obrazy,
... title = "Obrazy z Rus",
... author = "Karel Havlíček Borovský",
... }
... @BOOK{Elegie,
... title = "Tirolské elegie",
... author = "Karel Havlíček Borovský",
... }
... """, 'bibtex')
>>> data_lower = data.lower()
>>> data_lower.entries.keys()
['obrazy', 'elegie']
>>> for entry in data_lower.entries.values():
... entry.key
... entry.persons.keys()
... entry.fields.keys()
'obrazy'
['author']
['title']
'elegie'
['author']
['title']
'''
entries_lower = ((key.lower(), entry.lower()) for key, entry in self.entries.iteritems())
return type(self)(
entries=entries_lower,
preamble=self._preamble,
wanted_entries=self.wanted_entries,
min_crossrefs=self.min_crossrefs,
)
class BibliographyData(object):
def __init__(self,
entries=None,
preamble=None,
wanted_entries=None,
min_crossrefs=2):
"""
A :py:class:`.BibliographyData` object contains a dictionary of bibliography
entries referenced by their keys.
Each entry represented by an :py:class:`.Entry` object.
Additionally, :py:class:`.BibliographyData` may contain a LaTeX
preamble defined by ``@PREAMBLE`` commands in the BibTeX file.
"""
self.entries = OrderedCaseInsensitiveDict()
'''A dictionary of bibliography entries referenced by their keys.
The dictionary is case insensitive:
>>> bib_data = parse_string("""
... @ARTICLE{gnats,
... author = {L[eslie] A. Aamport},
... title = {The Gnats and Gnus Document Preparation System},
... }
... """, 'bibtex')
>>> bib_data.entries['gnats'] == bib_data.entries['GNATS']
True
'''
self.crossref_count = CaseInsensitiveDefaultDict(int)
self.min_crossrefs = min_crossrefs
self._preamble = []
if wanted_entries is not None:
self.wanted_entries = CaseInsensitiveSet(wanted_entries)
self.citations = CaseInsensitiveSet(wanted_entries)
else:
self.wanted_entries = None
self.citations = CaseInsensitiveSet()
if entries:
if isinstance(entries, Mapping):
entries = entries.iteritems()
for (key, entry) in entries:
self.add_entry(key, entry)
if preamble:
self._preamble.extend(preamble)
def __eq__(self, other):
if not isinstance(other, BibliographyData):
return super(BibliographyData, self) == other
return (self.entries == other.entries
and self._preamble == other._preamble)
def __repr__(self):
return 'BibliographyData(entries={entries}, preamble={preamble})'.format(
entries=repr(self.entries),
preamble=repr(self._preamble),
)
def add_to_preamble(self, *values):
self._preamble.extend(values)
@property
def preamble(self):
r'''
LaTeX preamble.
>>> bib_data = parse_string(r"""
... @PREAMBLE{"\newcommand{\noopsort}[1]{}"}
... """, 'bibtex')
>>> print bib_data.preamble
\newcommand{\noopsort}[1]{}
.. versionadded:: 0.19
Earlier versions used :py:meth:`.get_preamble()`, which is now deprecated.
'''
return ''.join(self._preamble)
@deprecated('0.19', 'use BibliographyData.preamble instead')
def get_preamble(self):
"""
.. deprecated:: 0.19
Use :py:attr:`.preamble` instead.
"""
return self.preamble
def want_entry(self, key):
return (self.wanted_entries is None or key in self.wanted_entries
or '*' in self.wanted_entries)
def get_canonical_key(self, key):
if key in self.citations:
return self.citations.get_canonical_key(key)
else:
return key
def add_entry(self, key, entry):
if not self.want_entry(key):
return
if key in self.entries:
report_error(
BibliographyDataError('repeated bibliograhpy entry: %s' % key))
return
entry.collection = self
entry.key = self.get_canonical_key(key)
self.entries[entry.key] = entry
try:
crossref = entry.fields['crossref']
except KeyError:
pass
else:
if self.wanted_entries is not None:
self.wanted_entries.add(crossref)
def add_entries(self, entries):
for key, entry in entries:
self.add_entry(key, entry)
def _get_crossreferenced_citations(self, citations, min_crossrefs):
"""
Get cititations not cited explicitly but referenced by other citations.
>>> from pybtex.database import Entry
>>> data = BibliographyData({
... 'main_article': Entry('article', {'crossref': 'xrefd_arcicle'}),
... 'xrefd_arcicle': Entry('article'),
... })
>>> list(data._get_crossreferenced_citations([], min_crossrefs=1))
[]
>>> list(data._get_crossreferenced_citations(['main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data._get_crossreferenced_citations(['Main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data._get_crossreferenced_citations(['main_article'], min_crossrefs=2))
[]
>>> list(data._get_crossreferenced_citations(['xrefd_arcicle'], min_crossrefs=1))
[]
>>> data2 = BibliographyData(data.entries, wanted_entries=data.entries.keys())
>>> list(data2._get_crossreferenced_citations([], min_crossrefs=1))
[]
>>> list(data2._get_crossreferenced_citations(['main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data2._get_crossreferenced_citations(['Main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data2._get_crossreferenced_citations(['main_article'], min_crossrefs=2))
[]
>>> list(data2._get_crossreferenced_citations(['xrefd_arcicle'], min_crossrefs=1))
[]
>>> list(data2._get_crossreferenced_citations(['xrefd_arcicle'], min_crossrefs=1))
[]
"""
crossref_count = CaseInsensitiveDefaultDict(int)
citation_set = CaseInsensitiveSet(citations)
for citation in citations:
try:
entry = self.entries[citation]
crossref = entry.fields['crossref']
except KeyError:
continue
try:
crossref_entry = self.entries[crossref]
except KeyError:
report_error(
BibliographyDataError(
'bad cross-reference: entry "{key}" refers to '
'entry "{crossref}" which does not exist.'.format(
key=citation,
crossref=crossref,
)))
continue
canonical_crossref = crossref_entry.key
crossref_count[canonical_crossref] += 1
if crossref_count[
canonical_crossref] >= min_crossrefs and canonical_crossref not in citation_set:
citation_set.add(canonical_crossref)
yield canonical_crossref
def _expand_wildcard_citations(self, citations):
"""
Expand wildcard citations (\citation{*} in .aux file).
>>> from pybtex.database import Entry
>>> data = BibliographyData((
... ('uno', Entry('article')),
... ('dos', Entry('article')),
... ('tres', Entry('article')),
... ('cuatro', Entry('article')),
... ))
>>> list(data._expand_wildcard_citations([]))
[]
>>> list(data._expand_wildcard_citations(['*']))
['uno', 'dos', 'tres', 'cuatro']
>>> list(data._expand_wildcard_citations(['uno', '*']))
['uno', 'dos', 'tres', 'cuatro']
>>> list(data._expand_wildcard_citations(['dos', '*']))
['dos', 'uno', 'tres', 'cuatro']
>>> list(data._expand_wildcard_citations(['*', 'uno']))
['uno', 'dos', 'tres', 'cuatro']
>>> list(data._expand_wildcard_citations(['*', 'DOS']))
['uno', 'dos', 'tres', 'cuatro']
"""
citation_set = CaseInsensitiveSet()
for citation in citations:
if citation == '*':
for key in self.entries:
if key not in citation_set:
citation_set.add(key)
yield key
else:
if citation not in citation_set:
citation_set.add(citation)
yield citation
def add_extra_citations(self, citations, min_crossrefs):
expanded_citations = list(self._expand_wildcard_citations(citations))
crossrefs = list(
self._get_crossreferenced_citations(expanded_citations,
min_crossrefs))
return expanded_citations + crossrefs
def to_string(self, bib_format, **kwargs):
"""
Return the data as a unicode string in the given format.
:param bib_format: Data format ("bibtex", "yaml", etc.).
.. versionadded:: 0.19
"""
writer = find_plugin('pybtex.database.output', bib_format)(**kwargs)
return writer.to_string(self)
def to_bytes(self, bib_format, **kwargs):
"""
Return the data as a byte string in the given format.
:param bib_format: Data format ("bibtex", "yaml", etc.).
.. versionadded:: 0.19
"""
writer = find_plugin('pybtex.database.output', bib_format)(**kwargs)
return writer.to_bytes(self)
def to_file(self, file, bib_format=None, **kwargs):
"""
Save the data to a file.
:param file: A file name or a file-like object.
:param bib_format: Data format ("bibtex", "yaml", etc.).
If not specified, Pybtex will try to guess by the file name.
.. versionadded:: 0.19
"""
if isinstance(file, basestring):
filename = file
else:
filename = getattr(file, 'name', None)
writer = find_plugin('pybtex.database.output',
bib_format,
filename=filename)(**kwargs)
return writer.write_file(self, file)
def lower(self):
u'''
Return another :py:class:`.BibliographyData` with all identifiers converted to lowercase.
>>> data = parse_string("""
... @BOOK{Obrazy,
... title = "Obrazy z Rus",
... author = "Karel Havlíček Borovský",
... }
... @BOOK{Elegie,
... title = "Tirolské elegie",
... author = "Karel Havlíček Borovský",
... }
... """, 'bibtex')
>>> data_lower = data.lower()
>>> data_lower.entries.keys()
['obrazy', 'elegie']
>>> for entry in data_lower.entries.values():
... entry.key
... entry.persons.keys()
... entry.fields.keys()
'obrazy'
['author']
['title']
'elegie'
['author']
['title']
'''
entries_lower = ((key.lower(), entry.lower())
for key, entry in self.entries.iteritems())
return type(self)(
entries=entries_lower,
preamble=self._preamble,
wanted_entries=self.wanted_entries,
min_crossrefs=self.min_crossrefs,
)
class BibliographyData(object):
def __init__(self, entries=None, preamble=None, wanted_entries=None, min_crossrefs=2):
self.entries = OrderedCaseInsensitiveDict()
self.crossref_count = CaseInsensitiveDefaultDict(int)
self.min_crossrefs = min_crossrefs
self._preamble = []
if wanted_entries is not None:
self.wanted_entries = CaseInsensitiveSet(wanted_entries)
self.citations = CaseInsensitiveSet(wanted_entries)
else:
self.wanted_entries = None
self.citations = CaseInsensitiveSet()
if entries:
if isinstance(entries, Mapping):
entries = entries.iteritems()
for (key, entry) in entries:
self.add_entry(key, entry)
if preamble:
self._preamble.extend(preamble)
def __eq__(self, other):
if not isinstance(other, BibliographyData):
return super(BibliographyData, self) == other
return (
self.entries == other.entries
and self._preamble == other._preamble
)
def __repr__(self):
return 'BibliographyData(entries={entries}, preamble={preamble})'.format(
entries=repr(self.entries),
preamble=repr(self._preamble),
)
def add_to_preamble(self, *values):
self._preamble.extend(values)
@deprecated('0.17', 'use get_preamble instead')
def preamble(self):
return self.get_preamble()
def get_preamble(self):
return ''.join(self._preamble)
def want_entry(self, key):
return (
self.wanted_entries is None
or key in self.wanted_entries
or '*' in self.wanted_entries
)
def get_canonical_key(self, key):
if key in self.citations:
return self.citations.get_canonical_key(key)
else:
return key
def add_entry(self, key, entry):
if not self.want_entry(key):
return
if key in self.entries:
report_error(BibliographyDataError('repeated bibliograhpy entry: %s' % key))
return
entry.collection = self
entry.key = self.get_canonical_key(key)
self.entries[entry.key] = entry
try:
crossref = entry.fields['crossref']
except KeyError:
pass
else:
if self.wanted_entries is not None:
self.wanted_entries.add(crossref)
def add_entries(self, entries):
for key, entry in entries:
self.add_entry(key, entry)
def get_crossreferenced_citations(self, citations, min_crossrefs):
"""
Get cititations not cited explicitly but referenced by other citations.
>>> from pybtex.database import Entry
>>> data = BibliographyData({
... 'main_article': Entry('article', {'crossref': 'xrefd_arcicle'}),
... 'xrefd_arcicle': Entry('article'),
... })
>>> list(data.get_crossreferenced_citations([], min_crossrefs=1))
[]
>>> list(data.get_crossreferenced_citations(['main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data.get_crossreferenced_citations(['Main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data.get_crossreferenced_citations(['main_article'], min_crossrefs=2))
[]
>>> list(data.get_crossreferenced_citations(['xrefd_arcicle'], min_crossrefs=1))
[]
>>> data2 = BibliographyData(data.entries, wanted_entries=data.entries.keys())
>>> list(data2.get_crossreferenced_citations([], min_crossrefs=1))
[]
>>> list(data2.get_crossreferenced_citations(['main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data2.get_crossreferenced_citations(['Main_article'], min_crossrefs=1))
['xrefd_arcicle']
>>> list(data2.get_crossreferenced_citations(['main_article'], min_crossrefs=2))
[]
>>> list(data2.get_crossreferenced_citations(['xrefd_arcicle'], min_crossrefs=1))
[]
>>> list(data2.get_crossreferenced_citations(['xrefd_arcicle'], min_crossrefs=1))
[]
"""
crossref_count = CaseInsensitiveDefaultDict(int)
citation_set = CaseInsensitiveSet(citations)
for citation in citations:
try:
entry = self.entries[citation]
crossref = entry.fields['crossref']
except KeyError:
continue
try:
crossref_entry = self.entries[crossref]
except KeyError:
report_error(BibliographyDataError(
'bad cross-reference: entry "{key}" refers to '
'entry "{crossref}" which does not exist.'.format(
key=citation, crossref=crossref,
)
))
continue
canonical_crossref = crossref_entry.key
crossref_count[canonical_crossref] += 1
if crossref_count[canonical_crossref] >= min_crossrefs and canonical_crossref not in citation_set:
citation_set.add(canonical_crossref)
yield canonical_crossref
def expand_wildcard_citations(self, citations):
"""
Expand wildcard citations (\citation{*} in .aux file).
>>> from pybtex.database import Entry
>>> data = BibliographyData((
... ('uno', Entry('article')),
... ('dos', Entry('article')),
... ('tres', Entry('article')),
... ('cuatro', Entry('article')),
... ))
>>> list(data.expand_wildcard_citations([]))
[]
>>> list(data.expand_wildcard_citations(['*']))
['uno', 'dos', 'tres', 'cuatro']
>>> list(data.expand_wildcard_citations(['uno', '*']))
['uno', 'dos', 'tres', 'cuatro']
>>> list(data.expand_wildcard_citations(['dos', '*']))
['dos', 'uno', 'tres', 'cuatro']
>>> list(data.expand_wildcard_citations(['*', 'uno']))
['uno', 'dos', 'tres', 'cuatro']
>>> list(data.expand_wildcard_citations(['*', 'DOS']))
['uno', 'dos', 'tres', 'cuatro']
"""
citation_set = CaseInsensitiveSet()
for citation in citations:
if citation == '*':
for key in self.entries:
if key not in citation_set:
citation_set.add(key)
yield key
else:
if citation not in citation_set:
citation_set.add(citation)
yield citation
def add_extra_citations(self, citations, min_crossrefs):
expanded_citations = list(self.expand_wildcard_citations(citations))
crossrefs = list(self.get_crossreferenced_citations(expanded_citations, min_crossrefs))
return expanded_citations + crossrefs
def lower(self):
u"""
Return another BibliographyData with all identifiers converted to lowercase.
>>> data = BibliographyData([
... ('Obrazy', Entry('Book', [('Title', u'Obrazy z Rus')], [('Author', u'Karel Havlíček Borovský')])),
... ('Elegie', Entry('BOOK', [('TITLE', u'Tirolské elegie')], [('AUTHOR', u'Karel Havlíček Borovský')])),
... ]).lower()
>>> data.entries.keys()
['obrazy', 'elegie']
>>> for entry in data.entries.values():
... entry.key
... entry.persons.keys()
... entry.fields.keys()
'obrazy'
['author']
['title']
'elegie'
['author']
['title']
"""
entries_lower = ((key.lower(), entry.lower()) for key, entry in self.entries.iteritems())
return type(self)(
entries=entries_lower,
preamble=self._preamble,
wanted_entries=self.wanted_entries,
min_crossrefs=self.min_crossrefs,
)