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value_counts pandas Code Example
value_counts pandas 
>>> index = pd.Index([3, 1, 2, 3, 4, np.nan])
>>> index.value_counts()
3.0    2
4.0    1
2.0    1
1.0    1
dtype: int64
Source: pandas.pydata.org
how to get value_counts output in dataframe format 
df = df.value_counts().rename_axis('unique_values').reset_index(name='counts')
print (df)
   unique_values  counts
0              2       3
1              1       2
Source: stackoverflow.com
frequency unique pandas 
df.stack().value_counts()
Source: stackoverflow.com
plot value counts pandas 


df.letters.value_counts().sort_values().plot(kind = 'barh')
Source: stackoverflow.com
relativefrequencies of the unique values pandas 
df.value_counts(normalize=True)
use of value_counts in python 
use of value_counts()



Python

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