大熊猫将文本追加到行中

Question

我只有一列，我试图在行值中添加“，”，但总是

遇到错误，“需要一个整数”

df = df['Cntr_Number'] + ','

print(df['Cntr_Number'].astype(str))

Answer 1

尝试一下：

df.loc[:,'Cntr_Number'] = df.Cntr_Number.apply(lambda x: str(x)+',')

Answer 2

您应该将列强制为str类型：

df['Cntr_Number'] = df['Cntr_Number'].as_type('str') + ','