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import csv
from secrets import token_hex
from .exceptions import IncompatibleRowLengthError
ROW_SIZE = 3
class Table:
def __init__(self, file_path: str):
self.csv_params = { 'delimiter': ',', 'quotechar': '"' }
self.csv_file = open(file_path, 'r', newline='')
self.rows = [tuple(row) for row in csv.reader(self.csv_file, **self.csv_params)]
def __del__(self):
self.__write_changes()
self.csv_file.close()
def __write_changes(self):
with open(f"./new_{token_hex(8)}.csv", 'w', newline='') as new_table:
writer = csv.writer(new_table, **self.csv_params)
for row in self.rows:
writer.writerow(row)
def row_at(self, index: int):
try:
return self.rows[index]
except IndexError:
return None
def get_rows(self, n: int):
return self.rows[:n]
def insert(self, new_row: tuple):
if len(new_row) != ROW_SIZE:
raise IncompatibleRowLengthError(len(new_row))
self.rows.append(new_row)
def delete_at(self, to_delete: int):
self.rows.pop(to_delete)
def search(self, lookup: str):
for row in self.rows:
if lookup in row:
return row
return None
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