count how many times a value appears in a row python code example

Example 1: pandas count specific value in column

(df[education]=='9th').sum()

Example 2: pd count how many item occurs in another column

df['Counts'] = df.groupby(['Color'])['Value'].transform('count')

Example 3: count how many times a value appears in array python

>>> [1, 2, 3, 4, 1, 4, 1].count(1)
3