在 Pandas to_html 中格式化输出数据
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format output data in pandas to_html
提问by wuwucat
I use pandas' to_html to generate output file, when data are written to the file they have many digits after the decimal point. The pandas' to_html float_format method can limit the digits, but when I used 'float_format' as below:
我使用pandas的to_html生成输出文件,当数据写入文件时,小数点后有很多数字。Pandas的 to_html float_format 方法可以限制数字,但是当我使用 'float_format' 时,如下所示:
DataFormat.to_html(header=True,index=False,na_rep='NaN',float_format='%10.2f')
it raise a exception:
它引发了一个异常:
typeError: 'str' object is not callable
how to solve this problem?
如何解决这个问题呢?
回答by DSM
From the to_htmldocs:
从to_html文档:
float_format : one-parameter function, optional
formatter function to apply to columns' elements if they are floats
default None
You need to pass a function. For example:
你需要传递一个函数。例如:
>>> df = pd.DataFrame({"A": [1.0/3]})
>>> df
A
0 0.333333
>>> print df.to_html()
<table border="1" class="dataframe">
<tr>
<th>0</th>
<td> 0.333333</td>
</tr>
[...]
but
但
>>> print df.to_html(float_format=lambda x: '%10.2f' % x)
<table border="1" class="dataframe">
[...]
<tr>
<th>0</th>
<td> 0.33</td>
</tr>
[...]

