input: Write a python function to create a scatterplot using the Seaborn library.
  assert create_scatterplot('sample_data1.csv', 'data1_x', 'data1_y') is None
  assert create_scatterplot('sample_data2.csv', 'data2_x', 'data2_y') is None
output: import seaborn as sns
  import pandas as pd
  import matplotlib.pyplot as plt
  
  def create_scatterplot(csv_file, x_col, y_col):
      data = pd.read_csv(csv_file)
      sns.scatterplot(data=data, x=x_col, y=y_col)
      plt.show()