Pandas zählen Zeilen mit Wert
len(df[df['score'] == 1.0])
Wrong Wryneck
len(df[df['score'] == 1.0])In [37]:
df = pd.DataFrame({'a':list('abssbab')})
df.groupby('a').count()
Out[37]:
a
a
a 2
b 3
s 2
[3 rows x 1 columns]