我正在以10,000行的塊讀取1 GB CSV文件。該文件有1106012行和171列,其他較小的文件不顯示任何錯誤,併成功完成,但是當我讀這個1 GB的文件,它顯示錯誤,每次在正確的行號1106011這是文件的第二行,我可以手動刪除該行,但這不是解決方案,因爲我有數百個相同大小的其他文件,我無法手動修復所有行。任何人都可以幫我解決這個問題。Python Pandas:標記數據出錯。 C錯誤:讀取1GB CSV文件時字符串開始內部的EOF
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
我然後在一個循環內調用這個函數,工作得很好。
huge_chunk_return = extract_csv_to_sql(huge_input_filename, huge_header_row, the_size_of_chunk_H, each_Row_H)
我讀這Pandas ParserError EOF character when reading multiple csv files to HDF5,這read_csv() & EOF character in string cause parsing issue這https://github.com/pandas-dev/pandas/issues/11654等等,並試圖包括read_csv參數如
engine='python'
quoting=csv.QUOTE_NONE // Hangs and even the python shell, don't know why
encoding='utf-8'
但沒有它的工作,它仍然拋出了以下錯誤
錯誤:
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
>>>
你能告訴我們一個有效行和無效行(已刪除了倒數第二) – Indent
我不能粘貼在這裏它有171列,它看起來像正常行,但在大熊貓被讀它,它拋出上面提到的文件第二行的錯誤。 – Wcan