最简单的方法是遍历format_mapping字典，然后将value表示的格式应用于列(由键表示) .示例-

The easiest way would be to iterate through the format_mapping dictionary and then apply on the column (denoted by the key) the formatting denoted by the value. Example -

for key, value in format_mapping.items():
    df[key] = df[key].apply(value.format)

演示-

In [62]: df = pd.DataFrame(data={'Currency': {0: 111.23, 1: 321.23},
   ....:                    'Int': {0: 23, 1: 3},
   ....:                    'Rate': {0: 0.03030, 1: 0.09840}}
   ....:             )

In [63]:

In [63]: format_mapping={'Currency': '${:,.2f}', 'Int': '{:,.0f}', 'Rate': '{:.2f}%'}

In [64]: for key, value in format_mapping.items():
   ....:     df[key] = df[key].apply(value.format)
   ....:

In [65]: df
Out[65]:
  Currency Int   Rate
0  $111.23  23  0.03%
1  $321.23   3  0.10%