回答編集履歴
1
コード修正
test
CHANGED
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@@ -6,7 +6,7 @@
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6
6
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7
7
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8
8
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9
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-
df = pd.DataFrame({'num1':[1,11,50], 'num2':[3,5,7]})
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9
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+
df = pd.DataFrame({'name1':list('aaabbb'), 'num1':[1,11,50]*2, 'num2':[3,5,7]*2})
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10
10
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11
11
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A = 5
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12
12
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@@ -28,18 +28,28 @@
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28
28
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31
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-
df['num3'] = df.apply(func, axis=1)
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31
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+
df['num3'] = df[df['name1']=='a'].apply(func, axis=1)
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32
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-
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33
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+
#df['num3'] = 0 # NaNがいやなら必要に応じてデフォルト値を設定
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34
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print(df)
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-
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37
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"""
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-
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name1 num1 num2 num3
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41
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-
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0 a 1 3 5
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43
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1 a 11 5 250
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44
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43
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-
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45
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2 a 50 7 error
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46
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3 b 1 3 NaN
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48
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49
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4 b 11 5 NaN
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50
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51
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5 b 50 7 NaN
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52
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53
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"""
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44
54
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45
55
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```
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