Manipulacao de JSON object

O jeito que consegui rodar esse codigo foi assim:

import pandas as pd

json_object = { "sku": ["VA-43"], "size": ["5ft"], "name": ["Blue Sky"], "description": ["A great product!"] }

df = pd.DataFrame.from_dict(json_object)

df['sku'] = df['sku'].str.lower()

df['sku'] = df['sku'].str.replace(r'\W', "_")

df['size'] = df['size'].str.lower().replace(r'\W', "_")

df['size'] = df['size'].str.replace(r'\W', "_")

df['name'] = df['name'].str.lower().replace(r'\W', "_")

df['name'] = df['name'].str.replace(r'\W', "_")

def counting(string): var_e = len(string) - 6 if len(string) > 10: return string[:var_e]+ '...'

else: return string

df = df.applymap(counting)

df['size'] = df['size'].apply(lambda x : x.split('f')[0]) df['size'] = str(int(df['size']) * 0.3048) + 'm' df

gostaria de inserir uns for loops, mas nao sei qual a syntax