Pandas Dataframe '[nan nan nan ... nan nan nan] 在軸中未找到'

Question

收到此錯誤'[nan nan nan ... nan nan nan] not found in axis'如果值為零，則嘗試從數據框中刪除列時

train_df.head()

external_company_id company_name    email_domain    mx_record   ... 
NaN                 Expresstext     expresstext.net unknown expresstext.net ... 0.0 0.0 0.0 0.0
NaN                 Jobox           jobox.ai    unknown www.jobox.ai    ... 17.0    -31.0   9.0 30.0
NaN                 Relola          relola.com  unknown home.relola.com ... 5.0 -25.0   5.0 

train_df.drop(train_df[train_df['total_funding'] == float(0)].index, inplace = True, axis=0) 

'[nan nan nan ... nan nan nan] not found in axis'

什么會導致這個錯誤？

Answer 1

我了解到 Pandas 會自動使用第一列作為 read_csv 的索引。 因為我的第一列是空的，所以每個索引不知何故最終都是 NaN，如上面的問題所示。

我運行這兩行代碼來創建一個新索引並填充它。

train_df.index.name = 'id'
train_df.index = [x for x in range(1, len(train_df.values)+1)]

然后之前的錯誤消失了

Answer 2

代替 ：

train_df.drop(...)

嘗試：

train_df = train_df[train_df[train_df['total_funding'] != float(0)]