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selecting letters in a row

#creating a new column and segregating the items
df['Item_Identifier_Combined'] = df['Item_Identifier'].apply(lambda x: x[0:2])
df['Item_Identifier_Combined'].value_counts()

output:-
FD    10201
NC     2686
DR     1317
Name: Item_Identifier_Combined, dtype: int64

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selecting letters in a row

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