counting unique values python

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showing results for - "counting unique values python"
Leona
01 May 2019
1df.loc[df['mID']=='A','hID'].agg(['nunique','count','size'])
2
Emma
06 Sep 2020
1words = ['a', 'b', 'c', 'a']
2unique_words = set(words)             # == set(['a', 'b', 'c'])
3unique_word_count = len(unique_words) # == 3
4
Hadrien
23 May 2018
1aa="XXYYYSBAA"
2bb=dict(zip(list(aa),[list(aa).count(i) for i in list(aa)]))
3print(bb)
4# output:
5# {'X': 2, 'Y': 3, 'S': 1, 'B': 1, 'A': 2}
6
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