python - Sometimes "PermissionError: [Errno 13]" in same code -


i'm using windows os. made function collects stock market data every second.

it works has error.

    open(output_file, "at") fp: permissionerror: [errno 13] permission denied: 'output.csv'

the argument 'output_file' not folder name , file not open in window.

although error, 'data_bat' contents intact.

after error, next writing works well. (sometimes has error)

weird thing if has error, frequency of error increased.

what think problem?

def output_batch(output_file, data, data_bat, bat_size):     data_seq = [58, 52, 46, 40, 34, 28, 22, 16, 10, 4, 1, 7, 13, 19, 25, 31, 37, 43, 49,             55]     data_bat.append(data)      if len(data_bat) >= bat_size:         open(output_file, "at") fp:             in range(0, bat_size):                 fp.write((data_bat[i][0] + ","))                 k in data_seq:                     fp.write((data_bat[i][k] + ","))                 fp.write("\n,")                 k in data_seq:                     fp.write((data_bat[i][k + 1] + ","))                   fp.write("\n,")                 k in data_seq:                     fp.write((data_bat[i][k + 2] + ","))                  fp.write("\n")             fp.close()         del data_bat[:] # refresh list

any , comment appreciate me. thanks.


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