import pandas as pd

# 46.8MB as a csv file.
stock_price = pd.read_csv('stock_price.csv', low_memory=False)

# to_excel vs. to_csv vs. to_hdf
writer = pd.ExcelWriter('stock_price.xlsx')
%timeit stock_price.to_excel(writer)
writer.save()
%timeit stock_price.to_csv('stock_price.csv')
%timeit stock_price.to_hdf('stock_price.h5', 'table')

# read_excel vs. read_csv vs. read_hdf
%timeit pd.read_excel('stock_price.xlsx')
%timeit pd.read_csv('stock_price.csv', low_memory=False)
%timeit pd.read_hdf('stock_price.h5', 'table')