python - 更改特定列中的值(pandas)

Question

我只是想更改特定列中的值

gene     scaf    GC     other
gene1    3456    78      other1
gene2    7898    56      other 2
gene3    5667    23      other 3

等 我想在每个基因名称处添加以下数字:_number1 并得到:

gene             scaf    GC      other
gene1_number1    3456    78      other1
gene2            7898    56      other 2
gene3            5667    23      other 3

谢谢大家。

Answer 1

您可以按条件添加字符串:

df.loc[df['gene'] == 'gene1', 'gene'] += '_number1'

print (df)
            gene  scaf  GC    other
0  gene1_number1  3456  78   other1
1          gene2  7898  56  other 2
2          gene3  5667  23  other 3