填写清单纳米值

Question

How to fill nan values with 0's in a list. I can do it for dataframes but don't know how to do it for lists?

listname=listname.fillna(0)

This isn't working.

Answer 1

You can use list comprehension and check with math.isnan :

import math
listname = [0 if math.isnan(x) else x for x in listname]

But that would not work with non float types, if you have strings, other numeric types etc.. in your list then you can use str(x) != 'nan '

listname = [0 if str(x)=='nan' else x for x in listname]

Answer 2

You can convert to a pandas series and back to a list

pd.Series(listname).fillna(0).tolist()

Consider the list listname

listname = [1, np.nan, 2, None, 3]

Then

pd.Series(listname, dtype=object).fillna(0).tolist()

[1, 0, 2, 0, 3]

Answer 3

listname1=listname.fillna()

这适用于所有int，string，float值