python - 修改一列的值在原始值后添加一个词

Question

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Answer 1

通过+和变量name添加带空格的字符串:

name = 'Name'
df['protein_name'] = name + ' ' + df['protein_name']
print (df)
            protein_name  LEN  Start    End
0     Name Ribosomal_S9:  121      0    121
1     Name Ribosomal_S8:  129    121    250
2    Name Ribosomal_L10:  100    250    350
3             Name GrpE:  166    350    516
4           Name DUF150:  141    516    657
115      Name TIGR03632:  117  40149  40266
116      Name TIGR03654:  175  40266  40441
117      Name TIGR03723:  314  40441  40755
118      Name TIGR03725:  212  40755  40967
119      Name TIGR03953:  188  40967  41155

或者用 f-strings:

df['protein_name'] = df['protein_name'].map(lambda x: f'{name} {x}')