turnung categorical values to numerical once

main.py

# turnung categorical values to numerical once
def name2num(name):
    return [all_letters.index(l) for l in name]
def num2name(num):
    return [all_letters[n] for n in num]
def category2num(c):
    return all_categories.index(c)
def num2category(num):
    return all_categories[num]

for i, batch in data.iterrows():
    category, name = batch
    data.loc[i, 'name'] = name2num(name)
    data.loc[i, 'category'] = category2num(category)