Untitled

from time import perf_counter

import pandas as pd
from openpyxl.styles import PatternFill, Font


def get_data_frame():
    d = {'col1': [i for i in range(1, 100000)], 'col2': [i for i in range(1, 100000)]}
    return pd.DataFrame(data=d)


fill = PatternFill(start_color="FFC7CE", end_color="FFC7CE", fill_type="solid")
ft = Font(color="FF0000")


def v1():
    writer = pd.ExcelWriter("v1.xlsx", engine="openpyxl")
    df = get_data_frame()
    df.to_excel(
        writer,
        startrow=0,
        startcol=0,
        index=False,
    )
    for column in writer.book.worksheets[0].iter_cols(min_row=0, min_col=0):
        for cell in column:
            cell.fill = fill
    writer.close()


def styler(row):
    return pd.Series(["background-color : red;" for _ in row])


def v2():
    writer = pd.ExcelWriter("v2.xlsx", engine="openpyxl")
    df = get_data_frame()
    styled = df.style.apply(styler)
    styled.to_excel(excel_writer=writer, index=False)


if __name__ == "__main__":
    t1_start = perf_counter()
    v1()
    t1_stop = perf_counter()
    print("V1 Elapsed time during the whole program in seconds:",
          t1_stop - t1_start)
    t2_start = perf_counter()
    v2()
    t2_stop = perf_counter()
    print("V2 Elapsed time during the whole program in seconds:",
          t2_stop - t2_start)