python - 使用 pd.read_clipboard 加载列跨越多行的数据帧

Question

给定来自 another question 的数据集:

    user                             item  \
0  b80344d063b5ccb3212f76538f3d9e43d87dca9e          The Cove - Jack Johnson   
1  b80344d063b5ccb3212f76538f3d9e43d87dca9e  Entre Dos Aguas - Paco De Lucia   
2  b80344d063b5ccb3212f76538f3d9e43d87dca9e            Stronger - Kanye West   
3  b80344d063b5ccb3212f76538f3d9e43d87dca9e    Constellations - Jack Johnson   
4  b80344d063b5ccb3212f76538f3d9e43d87dca9e      Learn To Fly - Foo Fighters   

rating  
0       1  
1       2  
2       1  
3       1  
4       1 

有没有办法以预期的格式加载此类数据，而无需手动将所有内容移动到同一行？

Answer 1

其中一种方法是根据 \n\n 进行拆分，然后创建单独的数据帧，然后将它们连接起来。即

#Bit of code from https://stackoverflow.com/questions/45740537/copying-multiindex-dataframes-with-pd-read-clipboard

def read_clipboard_split(index_names_row=None, **kwargs):
    encoding = kwargs.pop('encoding', 'utf-8')

    # only utf-8 is valid for passed value because that's what clipboard
    # supports
    if encoding is not None and encoding.lower().replace('-', '') != 'utf8':
        raise NotImplementedError(
            'reading from clipboard only supports utf-8 encoding')

    from pandas import compat, read_fwf
    from pandas.io.clipboard import clipboard_get
    from pandas.io.common import StringIO

    data = clipboard_get()
    items = data.split("\n\n")
    k = []
    for i in items:
        k.append(read_fwf(StringIO(i), **kwargs))
    df = pd.concat(k,axis=1)
    return df

read_clipboard_split()

示例运行:

     user                       \      0  b80344d063b5ccb3212f76538f3d9e43d87dca9e1  b80344d063b5ccb3212f76538f3d9e43d87dca9e  2  b80344d063b5ccb3212f76538f3d9e43d87dca9e   3  b80344d063b5ccb3212f76538f3d9e43d87dca9e   4  b80344d063b5ccb3212f76538f3d9e43d87dca9e      rating  0       1  1       2  2       1  3       1  4       1 

输出:

   Unnamed: 0              user                       \  Unnamed: 0  rating0  0           b80344d063b5ccb3212f76538f3d9e43d87dca9e  0           1     1  1           b80344d063b5ccb3212f76538f3d9e43d87dca9e  1           2     2  2           b80344d063b5ccb3212f76538f3d9e43d87dca9e  2           1     3  3           b80344d063b5ccb3212f76538f3d9e43d87dca9e  3           1     4  4           b80344d063b5ccb3212f76538f3d9e43d87dca9e  4           1