Python Pandas：标记数据时出错。C错误：读取1GB CSV fi时开始的字符串内EOF

Question

我正在读一个1gb的CSV文件，分为10000行。该文件有1106012行171列，其他较小的文件没有显示任何错误，并成功结束，但当我读取这个1GB文件时，它每次都显示错误，正好在第二行1106011，即文件的最后一行，我可以手动删除该行，但这不是解决方案，因为我有数百个相同大小的其他文件，我无法手动修复所有行。有人能帮我吗。在

def extract_csv_to_sql(input_file_name, header_row, size_of_chunk, eachRow):

        df = pd.read_csv(input_file_name,
                         header=None,
                         nrows=size_of_chunk,
                         skiprows=eachRow,
                         low_memory=False,
                         error_bad_lines=False,
                         sep=',')
                         # engine='python'
                         # quoting=csv.QUOTE_NONE
                         # encoding='utf-8'

        df.columns = header_row
        df = df.drop_duplicates(keep='first')
        df = df.apply(lambda x: x.astype(str).str.lower())

        return df

然后我在一个循环中调用这个函数，运行得很好。在

^{pr2}$

我读了这个Pandas ParserError EOF character when reading multiple csv files to HDF5，这个read_csv() & EOF character in string cause parsing issue，这个https://github.com/pandas-dev/pandas/issues/11654等等，并试图包含read_cv参数，比如

engine='python'

quoting=csv.QUOTE_NONE // Hangs and even the python shell, don't know why

encoding='utf-8'

但是没有一个有效，它仍然抛出以下错误

错误：

Traceback (most recent call last):
  File "C:\Users\WCan\Desktop\wcan_new_python\pandas_test_3.py", line 115, in <module>
    huge_chunk_return = extract_csv_to_sql(huge_input_filename, huge_header_row, the_size_of_chunk_H, each_Row_H)
  File "C:\Users\WCan\Desktop\wcan_new_python\pandas_test_3.py", line 24, in extract_csv_to_sql
    sep=',')
  File "C:\Users\WCan\AppData\Local\Programs\Python\Python36\lib\site-packages\pandas\io\parsers.py", line 655, in parser_f
    return _read(filepath_or_buffer, kwds)
  File "C:\Users\WCan\AppData\Local\Programs\Python\Python36\lib\site-packages\pandas\io\parsers.py", line 411, in _read
    data = parser.read(nrows)
  File "C:\Users\WCan\AppData\Local\Programs\Python\Python36\lib\site-packages\pandas\io\parsers.py", line 1005, in read
    ret = self._engine.read(nrows)
  File "C:\Users\WCan\AppData\Local\Programs\Python\Python36\lib\site-packages\pandas\io\parsers.py", line 1748, in read
    data = self._reader.read(nrows)
  File "pandas\_libs\parsers.pyx", line 893, in pandas._libs.parsers.TextReader.read (pandas\_libs\parsers.c:10885)
  File "pandas\_libs\parsers.pyx", line 966, in pandas._libs.parsers.TextReader._read_rows (pandas\_libs\parsers.c:11884)
  File "pandas\_libs\parsers.pyx", line 953, in pandas._libs.parsers.TextReader._tokenize_rows (pandas\_libs\parsers.c:11755)
  File "pandas\_libs\parsers.pyx", line 2184, in pandas._libs.parsers.raise_parser_error (pandas\_libs\parsers.c:28765)
pandas.errors.ParserError: Error tokenizing data. C error: EOF inside string starting at line 1106011
>>> 

Answer 1

如果您在linux下，请尝试删除所有不可打印的字符。 尝试在此操作后加载文件。在

tr -dc '[:print:]\n' < file > newfile