Pandas > Select column unique values

Name
Code
Output
dataframe = pandas.DataFrame(numpy.random.randint(0,100,size=(5, 4)), columns=['C1','C2','C3','C4'])
print ("dataframe")
print (dataframe)
print ("dataframe column unique values")
print (dataframe['C1'].unique())
dataframe
   C1  C2  C3  C4
0  97  77  28  12
1  61  58  86  64
2   0  12   0  62
3   0  66  88  34
4  16   6  51  60
dataframe column unique values
[97 61  0 16]