number of times a value occurs in dataframne
df['a'].value_counts()number of times a value occurs in dataframne
df['a'].value_counts()pandas count rows with value
len(df[df['score'] == 1.0])pandas count values by column
df = pd.DataFrame({'a':list('abssbab')})
df.groupby('a').count()Copyright © 2021 Codeinu
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