count unique values python code example
Example 1: count unique pandas
df['column'].nunique()
Example 2: return count of unique values pandas
#TO count repetition of each unique values(to find How many times the same-
# unique value is appearing in the data)
item_counts = df["Your_Column"].value_counts()
#Returns Dictionary => {"Value_name" : number_of_appearences}
Example 3: pandas count the number of unique values in a column
df['hID'].nunique()
5
Example 4: counting unique values python
df.loc[df['mID']=='A','hID'].agg(['nunique','count','size'])
Example 5: python count unique values in list
len(set(["word1", "word1", "word2", "word3"]))
# set is like a list but it removes duplicates
# len counts the number of things inside the set