from prettytable import PrettyTable

shoe = input("Enter a shoe: ")
t = PrettyTable(["shoe"])
t.add_row([shoe])

table_rows = lambda t: len(t.get_string().split('\n'))-4
table_txt = t.get_string(start=table_rows(t)-1)
row_txt = '\n'.join(table_txt.split('\n')[-2:])
with open("test.txt", "a") as file:
    file.write("\n" + table_txt)