import pandas as pd

# input_file = sys.argv[1]
# output_file = sys.argv[2]

input_file = 'sales_2013.xlsx'
output_file = 'output_files/5output_pandas.xls'

data_frame = pd.read_excel(input_file, 'january_2013', index_col=None)

important_dates = ['01/24/2013', '01/31/2013']

data_frame_value_in_set = data_frame[data_frame['Purchase Date'].isin(important_dates)]

writer = pd.ExcelWriter(output_file)

data_frame_value_in_set.to_excel(writer, sheet_name='jan_13_output', index=False)
# print(data_frame_value_in_set)
writer.save()