请查找下面这段代码有什么错误并改正：device_funnel = data.groupby(['device'])['home_page','listing_page','product_page','payment_page','confirmation_page'].sum() device_convertion = [] page = ['home_page','listing_page','product_page','payment_page','confirmation_page'] for i in range(len(device_funnel.index)): for col in range(len(page)-1): device_convertion.append(device_funnel[page[col+1]][i].sum()/device_funnel[page[col]][i].sum()) s = ['desktop']*4 + ['mobile']*4 [*zip(s,list*2,device_convertion)] device_funnel = pd.DataFrame([*zip(s,list*2,device_convertion)]).rename(columns = {0:'device',1:'flow',2:'device_convertion'}) plt.figure(figsize = (10,6),dpi=400) sns.barplot(x = 'device_convertion', y = 'flow',hue = 'device' , data = device_funnel) plt.show()

这段代码中有两个错误：

1. 在第一行代码中，需要使用双方括号来选择多列，而不是逗号。正确的代码应该是：`device_funnel = data.groupby(['device'])[['home_page','listing_page','product_page','payment_page','confirmation_page']].sum()`

2. 在第九行代码中，变量 `list` 是一个 Python 内置函数的名称，不能作为变量名使用。应该将其更改为其他名称，例如 `page_list`。

修改后的代码如下：

device_funnel = data.groupby(['device'])[['home_page','listing_page','product_page','payment_page','confirmation_page']].sum()
device_conversion = []
page_list = ['home_page', 'listing_page', 'product_page', 'payment_page', 'confirmation_page']
for i in range(len(device_funnel.index)):
    for col in range(len(page_list)-1):
        device_conversion.append(device_funnel[page_list[col+1]][i].sum() / device_funnel[page_list[col]][i].sum())
s = ['desktop']*4 + ['mobile']*4
result = [*zip(s, page_list*2, device_conversion)]
device_funnel = pd.DataFrame(result).rename(columns={0:'device', 1:'flow', 2:'device_conversion'})
plt.figure(figsize=(10, 6), dpi=400)
sns.barplot(x='device_conversion', y='flow', hue='device', data=device_funnel)
plt.show()