Не могу удалить пустые строки из большого файла csv

#deletes empty rows
#MemoryError: Unable to allocate 1.41 GiB for an array with shape (7, 26951165) and data type object
def delete_empty_rows():
    df = pd.read_csv("D:\\proc\\sales_report_clean.csv")
    df.dropna(
        axis=0,
        how='any',
        thresh=None,
        subset=None,
        inplace=True
    )

def delete_file_empty_rows():
    with open("D:\\proc\\sale_results_sliced.csv") as in_file:
        with open("D:\\proc\\sales_empty_deleted.csv", 'w') as out_file:
            writer = csv.writer(out_file)
            for row in csv.reader(in_file):
                if row:
                    writer.writerow(row)

#writes selected number of rows to new csv file
def take_first_n_rows_to_csv(rows=10000):
    with open("D:\\proc\\sales_report_clean.csv", 'r') as f, open("D:\\proc\\sale_results_sliced.csv", "w") as t:
        pd.read_csv(f, nrows=rows, delimiter=",").to_csv(t)
        f.close()

with open('eggs.csv', newline='') as csvfile:
...     spamreader = csv.reader(csvfile, delimiter=' ', quotechar='|')
...     for row in spamreader:

#deletes empty rows
def delete_empty_rows_again():
    with open('D:\\proc\\sales_result_sliced.csv', newline='') as csvfile, open("D:\\proc\\sales_result_sliced_delete_empty.csv", "w") as out_file:
        spamreader = csv.reader(csvfile, delimiter=' ', quotechar='|')
        writer = csv.writer(out_file)
        for row in spamreader:
            if row:
                writer.writerow(row)

def replace_commas_to_csv():
    with open("D:\\proc\\sales_report.csv", "r") as f, open("D:\\proc\\sales_report_clean.csv", "w", newline='',) as t:
        for i in f:
            if i == 0:
                break
            ns = re.sub(";", ",", i)
            t.write(ns)