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how to plot count on column of dataframe

df1['Winner'].value_counts().plot.bar()
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how to count number of columns in dataframe python

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

len(df.columns)
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python count variable and put the count in a column of data frame

df['freq'] = df.groupby('myvar')['myvar'].transform('count')
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