Answers for "take first appearance of row value in specific column pd dataframe python"

2

pandas series select first value

df = pd.DataFrame([[1, 2], [3, 4]], ['a', 'b'], ['A', 'B'])
df['A'].iloc[0]  # first item in a Series (Column)
Posted by: Guest on February-17-2021
2

pandas take first n rows

df.iloc[:n]
Posted by: Guest on July-01-2021

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