Python學習筆記：將Dataframe 某一欄中的List轉換成字串(源自stackoverflow)

import pandas as pd

lists={1:[[1,2,12,6,'ABC']],2:[[1000,4,'z','a']]}
#create test dataframe
df=pd.DataFrame.from_dict(lists,orient='index')
df=df.rename(columns={0:'lists'})

df

# 第一種解法：
df['liststring'] = [','.join(map(str, l)) for l in df['lists']]
df

# 第二種解法：
df['liststring'] = df.lists.apply(lambda x: ', '.join([str(i) for i in x]))
df