Question

我一直想从pandas DataFrame中获取名称和索引位置，并陷入如下所示的逻辑中，只是想知道是否有更好的方法来处理此问题。

import pandas as pd

df = pd.read_csv('/docs/Credit_Card.csv', encoding='ISO-8859-1')
cols = df.columns
col = [df.columns.get_loc(c) for c in df.columns if c in cols]
print(pd.DataFrame(list(zip(cols, col)),columns=['index_Name', 'Index_Number']))

结果输出：

             index_Name  Index_Number
0        Card Type Code             0
1   Card Type Full Name             1
2          Issuing Bank             2
3           Card Number             3
4    Card Holder's Name             4
5              CVV/CVV2             5
6            Issue Date             6
7           Expiry Date             7
8          Billing Date             8
9              Card PIN             9
10         Credit Limit            10

Answer 1

使用：

null

类似于numpy.c_：

import numpy as np

print(pd.DataFrame(list(zip(df.columns, 
                            np.arange(len(df.columns)))),
                   columns=['index_Name', 'Index_Number']))

或者：

print(pd.DataFrame(np.c_[df.columns, np.arange(len(df.columns))],
                   columns=['index_Name', 'Index_Number']))

Answer 2

使用dict {name: column_names: number: column_numering}创建数据仓库。

In [591]: pd.DataFrame({'index_Name': df.columns, 'Index_Number': range(len(df.columns))})
Out[591]:
             index_Name  Index_Number
0        Card Type Code             0
1   Card Type Full Name             1
2          Issuing Bank             2
3           Card Number             3
4    Card Holder's Name             4
5              CVV/CVV2             5
6            Issue Date             6
7           Expiry Date             7
8          Billing Date             8
9              Card PIN             9
10         Credit Limit            10

或使用

In [621]: pd.DataFrame({'index_Name': df.columns}).rename_axis('index_Number').reset_index()
Out[621]:
             index_Name  Index_Number
0        Card Type Code             0
1   Card Type Full Name             1
2          Issuing Bank             2
3           Card Number             3
4    Card Holder's Name             4
5              CVV/CVV2             5
6            Issue Date             6
7           Expiry Date             7
8          Billing Date             8
9              Card PIN             9
10         Credit Limit            10

如何获得熊猫指数的位置和名称

2 个答案: