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"Keyerror: 'open'" error occurred when I tried to draw with mplfinance #496

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@RabbitJian

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@RabbitJian

Hello, I'm a new hand in data processing. I made an error when trying to draw with mplfinance (I think the error is probably caused by my own ignorance, but I tried for 3 hours and couldn't solve it)hope the boss can see where my error is.

I tried to process the data. This is my data

             Open   High   Low   Close   Volume
Date
2021-07-13   5400   5401  5396    5397    11544
2021-07-13   5396   5400  5396    5397    12050
2021-07-13   5398   5399  5397    5398     7252
2021-07-13   5398   5401  5397    5398    15682
2021-07-13   5399   5401  5398    5400     7292
2021-07-13   5400   5402  5399    5399    20944
2021-07-13   5399   5400  5398    5399     4174
2021-07-13   5399   5400  5397    5398     5318
2021-07-13   5398   5399  5397    5398     3340
2021-07-13   5399   5400  5393    5393     5508
2021-07-13   5392   5394  5387    5393     6362
2021-07-13   5393   5394  5390    5394     5042
2021-07-13   5394   5395  5393    5395     3320
2021-07-13   5394   5398  5393    5395     2148
2021-07-13   5395   5395  5392    5393     3310
2021-07-13   5394   5395  5391    5391     2812
2021-07-13   5392   5392  5388    5389     3020
2021-07-13   5388   5391  5386    5391     6956
2021-07-13   5389   5391  5389    5390     1944
2021-07-13   5390   5394  5388    5393     2250
2021-07-13   5392   5393  5391    5393     2134
2021-07-13   5393   5394  5390    5390     4602

This is print(df.axes)


[DatetimeIndex(['2021-07-13', '2021-07-13', '2021-07-13', '2021-07-13',
               '2021-07-13', '2021-07-13', '2021-07-13', '2021-07-13',
               '2021-07-13', '2021-07-13', '2021-07-13', '2021-07-13',
               '2021-07-13', '2021-07-13', '2021-07-13', '2021-07-13',
               '2021-07-13', '2021-07-13', '2021-07-13', '2021-07-13',
               '2021-07-13', '2021-07-13', '2021-07-13'],
              dtype='datetime64[ns]', name='Date', freq=None), Index([' Open', ' High', ' Low', ' Close', ' Volume'], dtype='object')]

This is the result of my attempt to draw

Traceback (most recent call last):
  File "D:\Program\IDE\Anaconda\lib\site-packages\pandas\core\indexes\base.py", line 3361, in get_loc
    return self._engine.get_loc(casted_key)
  File "pandas\_libs\index.pyx", line 76, in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\index.pyx", line 108, in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\hashtable_class_helper.pxi", line 5198, in pandas._libs.hashtable.PyObjectHashTable.get_item
  File "pandas\_libs\hashtable_class_helper.pxi", line 5206, in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 'Open'

  File "d:\File\workspace\VS_workspace\Python_workspace\project_K\main.py", line 28, in <module>
    mpf.plot(df)
  File "D:\Program\IDE\Anaconda\lib\site-packages\mplfinance\plotting.py", line 301, in plot
    dates,opens,highs,lows,closes,volumes = _check_and_prepare_data(data, config)
  File "D:\Program\IDE\Anaconda\lib\site-packages\mplfinance\_arg_validators.py", line 63, in _check_and_prepare_data    
    opens   = data[o].values
  File "D:\Program\IDE\Anaconda\lib\site-packages\pandas\core\frame.py", line 3458, in __getitem__
    indexer = self.columns.get_loc(key)  File "D:\Program\IDE\Anaconda\lib\site-packages\pandas\core\indexes\base.py", line 3363, in get_loc
    raise KeyError(key) from err
KeyError: 'Open'

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