import argparse import re import signal import sys import pandas as pd import csv_metadata_quality.check as check import csv_metadata_quality.experimental as experimental import csv_metadata_quality.fix as fix from csv_metadata_quality.version import VERSION def parse_args(argv): parser = argparse.ArgumentParser(description="Metadata quality checker and fixer.") parser.add_argument( "--agrovoc-fields", "-a", help="Comma-separated list of fields to validate against AGROVOC, for example: dc.subject,cg.coverage.country", ) parser.add_argument( "--experimental-checks", "-e", help="Enable experimental checks like language detection", action="store_true", ) parser.add_argument( "--input-file", "-i", help="Path to input file. Can be UTF-8 CSV or Excel XLSX.", required=True, type=argparse.FileType("r", encoding="UTF-8"), ) parser.add_argument( "--output-file", "-o", help="Path to output file (always CSV).", required=True, type=argparse.FileType("w", encoding="UTF-8"), ) parser.add_argument( "--unsafe-fixes", "-u", help="Perform unsafe fixes.", action="store_true" ) parser.add_argument( "--version", "-V", action="version", version=f"CSV Metadata Quality v{VERSION}" ) parser.add_argument( "--exclude-fields", "-x", help="Comma-separated list of fields to skip, for example: dc.contributor.author,dc.identifier.citation", ) args = parser.parse_args() return args def signal_handler(signal, frame): sys.exit(1) def run(argv): args = parse_args(argv) # set the signal handler for SIGINT (^C) signal.signal(signal.SIGINT, signal_handler) # Read all fields as strings so dates don't get converted from 1998 to 1998.0 df = pd.read_csv(args.input_file, dtype=str) for column in df.columns: # Check if the user requested to skip any fields if args.exclude_fields: skip = False # Split the list of excludes on ',' so we can test exact matches # rather than fuzzy matches with regexes or "if word in string" for exclude in args.exclude_fields.split(","): if column == exclude and skip is False: skip = True if skip: print(f"Skipping {column}") continue # Fix: whitespace df[column] = df[column].apply(fix.whitespace, field_name=column) # Fix: newlines if args.unsafe_fixes: df[column] = df[column].apply(fix.newlines) # Fix: missing space after comma. Only run on author and citation # fields for now, as this problem is mostly an issue in names. if args.unsafe_fixes: match = re.match(r"^.*?(author|citation).*$", column) if match is not None: df[column] = df[column].apply(fix.comma_space, field_name=column) # Fix: perform Unicode normalization (NFC) to convert decomposed # characters into their canonical forms. if args.unsafe_fixes: df[column] = df[column].apply(fix.normalize_unicode, field_name=column) # Fix: unnecessary Unicode df[column] = df[column].apply(fix.unnecessary_unicode) # Check: invalid and unnecessary multi-value separators df[column] = df[column].apply(check.separators, field_name=column) # Check: suspicious characters df[column] = df[column].apply(check.suspicious_characters, field_name=column) # Fix: invalid and unnecessary multi-value separators if args.unsafe_fixes: df[column] = df[column].apply(fix.separators, field_name=column) # Run whitespace fix again after fixing invalid separators df[column] = df[column].apply(fix.whitespace, field_name=column) # Fix: duplicate metadata values df[column] = df[column].apply(fix.duplicates, field_name=column) # Check: invalid AGROVOC subject if args.agrovoc_fields: # Identify fields the user wants to validate against AGROVOC for field in args.agrovoc_fields.split(","): if column == field: df[column] = df[column].apply(check.agrovoc, field_name=column) # Check: invalid language match = re.match(r"^.*?language.*$", column) if match is not None: df[column] = df[column].apply(check.language) # Check: invalid ISSN match = re.match(r"^.*?issn.*$", column) if match is not None: df[column] = df[column].apply(check.issn) # Check: invalid ISBN match = re.match(r"^.*?isbn.*$", column) if match is not None: df[column] = df[column].apply(check.isbn) # Check: invalid date match = re.match(r"^.*?date.*$", column) if match is not None: df[column] = df[column].apply(check.date, field_name=column) # Check: filename extension if column == "filename": df[column] = df[column].apply(check.filename_extension) ## # Perform some checks on rows so we can consider items as a whole rather # than simple on a field-by-field basis. This allows us to check whether # the language used in the title and abstract matches the language indi- # cated in the language field, for example. # # This is slower and apparently frowned upon in the Pandas community be- # cause it requires iterating over rows rather than using apply over a # column. For now it will have to do. ## if args.experimental_checks: # Transpose the DataFrame so we can consider each row as a column df_transposed = df.T for column in df_transposed.columns: experimental.correct_language(df_transposed[column]) # Write df.to_csv(args.output_file, index=False) # Close the input and output files before exiting args.input_file.close() args.output_file.close() sys.exit(0)