回答編集履歴
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d
test
CHANGED
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@@ -17,3 +17,31 @@
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17
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print(df.size) # データ数
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```
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21
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それとも重複なしのデータの種類の数のことでしょうか
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```python
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import pandas as pd
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31
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df = pd.DataFrame({'class':['a','a','a','b','b','c'], 'score':[0,20,10,1,3,21]})
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print(df["class"].value_counts())
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# a 3
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# b 2
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# c 1
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# Name: class, dtype: int64
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```
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