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在 Excel 上的一张工作表中,我有 2 列(样本/总体)需要计算行数。我需要在 PyCharm 上使用 pandas 来计算它们。我怎样才能做到这一点?

我试过这个但没有奏效:

import pandas as pd

x = pd.read_excel(r"C:\Users\nan\PycharmProjects\giraffe\GENERA.xlsx", sheet_name=["Sample Info"], engine="openpyxl")

print(pd.value_counts(x["Sample"]))
print(pd.value_counts(x["Population"]))

给我错误:

C:\Users\nan\PycharmProjects\giraffe\venv\lib\site-packages\openpyxl\worksheet\_reader.py:312: UserWarning: Unknown extension is not supported and will be removed
  warn(msg)
Traceback (most recent call last):
  File "C:/Users/nan/PycharmProjects/giraffe/genera1.py", line 6, in <module>
    print(pd.value_counts(x["Sample"]))
KeyError: 'Sample'
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