Answers for "count columns in dataframe"

5

pandas dataframe get number of columns

import pandas as pd
df = pd.DataFrame({"pear": [1,2,3], "apple": [2,3,4], "orange": [3,4,5]})

len(df.columns)
3
Posted by: Guest on August-23-2020
1

python count variable and put the count in a column of data frame

df['freq'] = df.groupby('myvar')['myvar'].transform('count')
Posted by: Guest on June-19-2020

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