Advanced Parsing Configuration

class BibTexParser:
    """
    A parser for reading BibTeX bibliographic data files.
    
    Provides extensive configuration options for customizing parsing behavior
    including entry filtering, field processing, string handling, and
    cross-reference resolution.
    """
    
    def __init__(
        self,
        customization=None,
        ignore_nonstandard_types: bool = True,
        homogenize_fields: bool = False,
        interpolate_strings: bool = True,
        common_strings: bool = True,
        add_missing_from_crossref: bool = False
    ):
        """
        Create a configurable BibTeX parser.

        Parameters:
        - customization (callable, optional): Function to process entries after parsing
        - ignore_nonstandard_types (bool): If True, ignore non-standard entry types
        - homogenize_fields (bool): If True, normalize field names (e.g., 'url' to 'link')
        - interpolate_strings (bool): If True, replace string references with values
        - common_strings (bool): If True, include common month abbreviations
        - add_missing_from_crossref (bool): If True, resolve crossref dependencies

        Returns:
        BibTexParser: Configured parser instance
        """

def parse(self, bibtex_str: str, partial: bool = False) -> BibDatabase:
    """
    Parse a BibTeX string into a BibDatabase object.

    Parameters:
    - bibtex_str (str): BibTeX string to parse
    - partial (bool): If True, continue parsing on errors; if False, raise exceptions

    Returns:
    BibDatabase: Parsed bibliographic database

    Raises:
    ParseException: If parsing fails and partial=False
    """

def parse_file(self, file, partial: bool = False) -> BibDatabase:
    """
    Parse a BibTeX file into a BibDatabase object.

    Parameters:
    - file (file): File object to parse
    - partial (bool): If True, continue parsing on errors; if False, raise exceptions

    Returns:
    BibDatabase: Parsed bibliographic database

    Raises:
    ParseException: If parsing fails and partial=False
    """

def parse(data: str, *args, **kwargs) -> BibDatabase:
    """
    Convenience function for parsing BibTeX data.
    
    Creates a BibTexParser with the provided arguments and parses the data.
    
    Parameters:
    - data (str): BibTeX string to parse
    - *args, **kwargs: Arguments passed to BibTexParser constructor
    
    Returns:
    BibDatabase: Parsed bibliographic database
    """

from bibtexparser.bparser import BibTexParser

# Allow non-standard entry types (like @software, @dataset)
parser = BibTexParser(ignore_nonstandard_types=False)

# Only accept standard BibTeX types (article, book, etc.)
parser = BibTexParser(ignore_nonstandard_types=True)  # Default

# Homogenize field names (e.g., 'url' -> 'link', 'keywords' -> 'keyword')
parser = BibTexParser(homogenize_fields=True)

# Keep original field names
parser = BibTexParser(homogenize_fields=False)  # Default

# Replace string references with their values
parser = BibTexParser(interpolate_strings=True)  # Default

# Keep string structure for later processing
parser = BibTexParser(interpolate_strings=False)

# Include common month abbreviations (jan, feb, etc.)
parser = BibTexParser(common_strings=True)  # Default

# Don't include common strings
parser = BibTexParser(common_strings=False)

# Resolve crossref fields and merge referenced entries
parser = BibTexParser(add_missing_from_crossref=True)

# Keep crossref fields as-is
parser = BibTexParser(add_missing_from_crossref=False)  # Default

from bibtexparser.bparser import BibTexParser

def customize_entries(record):
    """Custom function to process entries during parsing."""
    # Convert author names to "Last, First" format
    if 'author' in record:
        # Apply author processing
        record = bibtexparser.customization.author(record)
    
    # Convert LaTeX to Unicode
    record = bibtexparser.customization.convert_to_unicode(record)
    
    return record

parser = BibTexParser(customization=customize_entries)

with open('bibliography.bib') as bibtex_file:
    bib_database = parser.parse_file(bibtex_file)

from bibtexparser.bparser import BibTexParser

# Configure parser for maximum compatibility
parser = BibTexParser(
    ignore_nonstandard_types=False,  # Accept all entry types
    homogenize_fields=True,          # Normalize field names
    common_strings=True,             # Include month abbreviations
    add_missing_from_crossref=True   # Resolve crossrefs
)

try:
    with open('messy_bibliography.bib') as bibtex_file:
        # Use partial=True to continue parsing on errors
        bib_database = parser.parse_file(bibtex_file, partial=True)
        print(f"Parsed {len(bib_database.entries)} entries")
except Exception as e:
    print(f"Parsing failed: {e}")

from bibtexparser.bparser import BibTexParser

# Create parser that can be used multiple times
parser = BibTexParser()
parser.expect_multiple_parse = True  # Disable warning

# Parse multiple files into the same database
for filename in ['refs1.bib', 'refs2.bib', 'refs3.bib']:
    with open(filename) as bibtex_file:
        bib_database = parser.parse_file(bibtex_file)

print(f"Total entries: {len(parser.bib_database.entries)}")

# Configuration for strict academic BibTeX
academic_parser = BibTexParser(
    ignore_nonstandard_types=True,
    homogenize_fields=False,
    interpolate_strings=True,
    common_strings=True
)

# Configuration for modern/extended BibTeX
modern_parser = BibTexParser(
    ignore_nonstandard_types=False,  # Allow @software, @online, etc.
    homogenize_fields=True,          # Normalize field names
    interpolate_strings=True,
    common_strings=True,
    add_missing_from_crossref=True   # Handle complex references
)