Python，Panda.read_excel从一张纸读取多组数据时出现问题

Question

我有一个包含两套数据（图片）的Excel工作表。我想用Python中的matplotlib绘制它们，并用熊猫导入它们。我缩小了脚本的范围以使其阅读更快。

脚本：

import matplotlib.pyplot as plt
import pandas as pd

Tabelle = pd.read_excel("C:\\Users\\alexk\\Dropbox\\WW\\WW Master\\1. Semester\\WW2\\WW2 Kernfachpraktikum\\KFP2\\Ergebnisse.xlsx","Tabelle1")

x = Tabelle["Number1"]
y = Tabelle["Value1"]
x2=Tabelle["Number2"]
y2=Tabelle["Value2"]

plt.bar(x, y)
plt.bar(x2,y2)

plt.show()

脚本结尾。

在脚本中，当x2和y2杂乱无章时，可以绘制x和y。当我想读取/绘制/绘制x2和y2时，出现错误。

错误代码：

    Traceback (most recent call last):
  File "C:\Users\alexk\PycharmProjects\venv\lib\site-packages\pandas\core\indexes\base.py", line 3078, in get_loc
    return self._engine.get_loc(key)
  File "pandas\_libs\index.pyx", line 140, in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\index.pyx", line 162, in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\hashtable_class_helper.pxi", line 1492, in pandas._libs.hashtable.PyObjectHashTable.get_item
  File "pandas\_libs\hashtable_class_helper.pxi", line 1500, in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 'Number2'

在处理上述异常期间，发生了另一个异常：

Traceback (most recent call last):
  File "C:/Users/alexk/PycharmProjects/Vickers.py", line 8, in <module>
    x2=Tabelle["Number2"]
  File "C:\Users\alexk\PycharmProjects\venv\lib\site-packages\pandas\core\frame.py", line 2688, in __getitem__
    return self._getitem_column(key)
  File "C:\Users\alexk\PycharmProjects\venv\lib\site-packages\pandas\core\frame.py", line 2695, in _getitem_column
    return self._get_item_cache(key)
  File "C:\Users\alexk\PycharmProjects\venv\lib\site-packages\pandas\core\generic.py", line 2489, in _get_item_cache
    values = self._data.get(item)
  File "C:\Users\alexk\PycharmProjects\venv\lib\site-packages\pandas\core\internals.py", line 4115, in get
    loc = self.items.get_loc(item)
  File "C:\Users\alexk\PycharmProjects\venv\lib\site-packages\pandas\core\indexes\base.py", line 3080, in get_loc
    return self._engine.get_loc(self._maybe_cast_indexer(key))
  File "pandas\_libs\index.pyx", line 140, in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\index.pyx", line 162, in pandas._libs.index.IndexEngine.get_loc
  File "pandas\_libs\hashtable_class_helper.pxi", line 1492, in pandas._libs.hashtable.PyObjectHashTable.get_item
  File "pandas\_libs\hashtable_class_helper.pxi", line 1500, in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 'Number2'

Process finished with exit code 1

错误代码结尾。

对于其他Excel工作表，此过程运行良好。我想念什么？它与Excel工作表有关吗？