如何在最终输出中不将其他所有行都分隔为CSV的情况下拆分CSV文件

Question

使用以下代码拆分大型csv文件。但是，拆分某些文件时，它会在每行之间添加空格。在下面的代码中，我可以告诉代码不要在输出的行之间创建空格吗？我相信我尝试拆分的某些文件可能会嵌入LF或CR，如果这有助于提供更多信息，则会导致它。代码如下：

import os


def split(filehandler, delimiter=',', row_limit=25000,
          output_name_template='output_%s.csv', output_path='.', keep_headers=True):
    import csv
    reader = csv.reader(filehandler, delimiter=delimiter)
    current_piece = 1
    current_out_path = os.path.join(
        output_path,
        output_name_template % current_piece
    )
    current_out_writer = csv.writer(open(current_out_path, 'w'), delimiter=delimiter)
    current_limit = row_limit
    if keep_headers:
        headers = reader.next()
        current_out_writer.writerow(headers)
    for i, row in enumerate(reader):
        if i + 1 > current_limit:
            current_piece += 1
            current_limit = row_limit * current_piece
            current_out_path = os.path.join(
                output_path,
                output_name_template % current_piece
            )
            current_out_writer = csv.writer(open(current_out_path, 'w'), delimiter=delimiter)
            if keep_headers:
                current_out_writer.writerow(headers)
        current_out_writer.writerow(row)