Pandas 如何制作数据帧&x27；s列出要字符串的行？

我有一个数据帧，每行都是这样的列表：

   word_count   id  token
    0       6   0   [customer, executive]
    1       6   0   [purchase]
    2       6   0   [purchase, agent]
    3       6   0   [housekeeping]
    4       6   0   [night, auditor, &, guest, reception, agent]

  word_count id token
0       6   0   customer executive
1       6   0   purchase
2       6   0   purchase agent
3       6   0   housekeeping
4       6   0   night auditor & guest reception agent

我想将列表转换为如下字符串：

   word_count   id  token
    0       6   0   [customer, executive]
    1       6   0   [purchase]
    2       6   0   [purchase, agent]
    3       6   0   [housekeeping]
    4       6   0   [night, auditor, &, guest, reception, agent]

  word_count id token
0       6   0   customer executive
1       6   0   purchase
2       6   0   purchase agent
3       6   0   housekeeping
4       6   0   night auditor & guest reception agent

我使用了以下方法，但当我看到de.head（）时，没有任何变化：

for index, row in de.iterrows():
    row['token']=' '.join(str(e) for e in row['token'])
de.head()

及

及

列表理解：

df['token'] = [' '.join(x) for x in df['token']]

或

应用

：

df['token'] = df['token'].apply(' '.join)