How can I remove Nan from list Python/NumPy

Question

I have a list that countain values, one of the values I got is \'nan\'

countries= [nan, \'USA\', \'UK\', \'France\']

I tried to remove it,

Answer 1

use numpy fancy indexing:

In [29]: countries=np.asarray(countries)

In [30]: countries[countries!='nan']
Out[30]: 
array(['USA', 'UK', 'France'], 
      dtype='|S6')