import pandas as pd

# Creating a DataFrame
df = pd.DataFrame({'A': [1, 2, 3, 1, 3], 'B': [4, 5, 6, 7, 8,],
       'C': [7, 8, 9, 10, 11]})

# Drop the duplicate values in a Pandas column
unique_values = df['A'].drop_duplicates()

# Print unique values
print(unique_values)

>>>

0    1
1    2
2    3