python - pandas内存错误

Question

  File "D:\WinPython-32bit-2.7.9.3\python-2.7.9\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 680, in runfile
    execfile(filename, namespace)

  File "D:\WinPython-32bit-2.7.9.3\python-2.7.9\lib\site-packages\spyderlib\widgets\externalshell\sitecustomize.py", line 71, in execfile
    exec(compile(scripttext, filename, 'exec'), glob, loc)

  File "D:/pywork/Marking/DataProcessing.py", line 113, in <module>
    df = pd.DataFrame(data, columns=colNames)

  File "D:\WinPython-32bit-2.7.9.3\python-2.7.9\lib\site-packages\pandas\core\frame.py", line 258, in __init__
    dtype=dtype)

  File "D:\WinPython-32bit-2.7.9.3\python-2.7.9\lib\site-packages\pandas\core\frame.py", line 4627, in _arrays_to_mgr
    return create_block_manager_from_arrays(arrays, arr_names, axes)

  File "D:\WinPython-32bit-2.7.9.3\python-2.7.9\lib\site-packages\pandas\core\internals.py", line 3539, in create_block_manager_from_arrays
    blocks = form_blocks(arrays, names, axes)

  File "D:\WinPython-32bit-2.7.9.3\python-2.7.9\lib\site-packages\pandas\core\internals.py", line 3614, in form_blocks
    int_blocks = _multi_blockify(int_items)

  File "D:\WinPython-32bit-2.7.9.3\python-2.7.9\lib\site-packages\pandas\core\internals.py", line 3681, in _multi_blockify
    list(tup_block), dtype)

  File "D:\WinPython-32bit-2.7.9.3\python-2.7.9\lib\site-packages\pandas\core\internals.py", line 3725, in _stack_arrays
    stacked = np.empty(shape, dtype=dtype)

MemoryError

使用pandas.DataFrame读175MB数据（111W行 X 38列），程序执行过程中报如上错误。

Answer 1

Is it a reading error or a calculation error?
If it's the latter, you can try delping some useless col after reading it, and then calculate
I have tried it with millions of rows, but not with so many columns