python - 在单元格中的第一个字母之后拆分 Pandas 数据框列(一分为二)

Question

问题

我想将 pandas 数据框中的一列拆分为 2 列，在百分比列(见下文)中，每个条目都以大写字母字符开头，我想在这封信之后立即拆分“百分比”列，新列标记为“氨基酸”。

当前代码:

import pandas as pd

df = pd.read_csv('foo.csv')

df['Amino Acid'], df['Percentage'] = zip(*df['Percentage'].map(lambda x: x.split('[^a-zA-Z]')))

df.to_csv('bar.csv',index=False)

输入数据示例

+-----------------------------+-------+-----+-----------+---------------------------------------------------------------------------------------------+
|           Species           |  ID   | OGT |    DB     |                                         Percentage                                          |
+-----------------------------+-------+-----+-----------+---------------------------------------------------------------------------------------------+
| Halogeometricum borinquense | 60847 |  37 | ATCC/DSMZ | E is 8.333003365670164% in ./archaea/GCF_000337855.1/GCF_000337855.1_ASM33785v1_protein.faa |
| Halogeometricum borinquense | 60847 |  37 | ATCC/DSMZ | R is 6.310991522830762% in ./archaea/GCF_000337855.1/GCF_000337855.1_ASM33785v1_protein.faa |
| Halogeometricum borinquense | 60847 |  37 | ATCC/DSMZ | A is 10.22668778459711% in ./archaea/GCF_000337855.1/GCF_000337855.1_ASM33785v1_protein.faa |
+-----------------------------+-------+-----+-----------+---------------------------------------------------------------------------------------------+

所需输出示例

+-----------------------------+-------+-----+-----------+------------+--------------------------------------------------------------------------------------------+
|           Species           |  ID   | OGT |    DB     | Amino Acid |                                         Percentage                                         |
+-----------------------------+-------+-----+-----------+------------+--------------------------------------------------------------------------------------------+
| Halogeometricum borinquense | 60847 |  37 | ATCC/DSMZ | E          |  is 8.333003365670164% in ./archaea/GCF_000337855.1/GCF_000337855.1_ASM33785v1_protein.faa |
| Halogeometricum borinquense | 60847 |  37 | ATCC/DSMZ | R          | is 6.310991522830762% in ./archaea/GCF_000337855.1/GCF_000337855.1_ASM33785v1_protein.faa  |
| Halogeometricum borinquense | 60847 |  37 | ATCC/DSMZ | A          | is 10.22668778459711% in ./archaea/GCF_000337855.1/GCF_000337855.1_ASM33785v1_protein.faa  |
+-----------------------------+-------+-----+-----------+------------+--------------------------------------------------------------------------------------------+

Answer 1

可以直接提取第一个字母:

df['Amino Acid'] = df['Percentage'].str[0]
df['Percentage'] = df['Percentage'].str[1:]