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52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
"""Provides tools for parsing and writing to a csv file.
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"""
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from typing import List, Iterable, Tuple
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import csv
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import os
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def records_to_csv(output_path: str, rows: Iterable[List[str]]):
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"""Writes rows to a csv file at the specified path.
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Args:
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output_path (str): The path where the csv file will be written.
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rows (List[List[str]]): The rows to be written. Each row of a
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list of strings will be written according
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to their index (i.e. column 3 will be index 2).
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"""
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parent_dir, file = os.path.split(output_path)
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if not os.path.exists(parent_dir):
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os.makedirs(parent_dir)
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with open(output_path, 'w', encoding="utf-8-sig", newline='') as csvfile:
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writer = csv.writer(csvfile)
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for row in rows:
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writer.writerow(row)
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def csv_to_records(input_path: str, header_row: bool) -> Tuple[List[List[str]], List[str]]:
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"""Reads rows from a csv file at the specified path.
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Args:
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input_path (str): The path where the csv file will be read.
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header_row (bool): Whether or not there is a header row to be skipped.
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"""
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with open(input_path, encoding='utf-8-sig') as csv_file:
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csv_reader = csv.reader(csv_file, delimiter=',')
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header = None
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results = []
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try:
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for row in csv_reader:
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if header_row:
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header = row
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header_row = False
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else:
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results.append(row)
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except Exception as e:
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raise Exception("There was an error parsing csv {path}".format(path=input_path), e)
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return results, header
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