python之删除具有空白值的键

如何删除字典中没有任何值的键。我有一个命令:

d = {'CB': '', 'CA': [-7.5269999504089355, -2.2330000400543213, 6.748000144958496], 'C': [-8.081000328063965, -3.619999885559082, 6.406000137329102], 'N': [-6.626999855041504, -2.318000078201294, 7.9029998779296875], 'H':''} 

我想删除值为空的键。我需要输出为:

d = {'CA': [-7.5269999504089355, -2.2330000400543213, 6.748000144958496], 'C': [-8.081000328063965, -3.619999885559082, 6.406000137329102], 'N': [-6.626999855041504, -2.318000078201294, 7.9029998779296875]} 

如何做到这一点？

请您参考如下方法:

使用字典理解:

>>> {k:v for k, v in d.items() if v != ''} 
{'N': [-6.626999855041504, -2.318000078201294, 7.9029998779296875], 'CA': [-7.5269999504089355, -2.2330000400543213, 6.748000144958496], 'C': [-8.081000328063965, -3.619999885559082, 6.406000137329102]} 

如果您所说的空是指任何虚假值，则只需使用 if v。

如果要修改原始dict本身(这会影响对dict对象的所有引用):

for k, v in d.items(): 
    if not v: del d[k]