将百分比列添加到带有百分比符号的熊猫数据框

Question

对于以下将用作熊猫数据框的excel

   df['% '] = (df['Code Lines'] / df['Code Lines'].sum())*100

输出自来

Language    # of Files  Blank Lines Comment Lines   Code Lines   % 
C++            15         66         35               354      3.064935065
C/C++ Header    1         3          7                 4       0.034632035
Markdown        6         73         0                142      1.229437229
Python         110        1998      2086              4982     43.13419913
Tcl/Tk          1         14         18               273      2.363636364
YAML            1          0         6                 20      0.173160173
Total          134        2154      2152                5775    50

我正在尝试让％列只能是2个带百分号的小数位

类似这样

Language    # of Files  Blank Lines Comment Lines   Code Lines   % 
C++            15         66         35               354      3.06%
C/C++ Header    1         3          7                 4       0.03%
Markdown        6         73         0                142      1.22%

Answer 1

使用round，转换为字符串并添加%：

df['%'] = ((df['Code Lines'] / df['Code Lines'].sum())*100).round(2).astype(str) + '%'