Python list fill nan

# You can convert to a pandas series and back to a list:
# pd.Series(listname).fillna(0).tolist()

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

pd.Series(listname, dtype=object).fillna(0).tolist()
# [1, 0, 2, 0, 3]

Source: stackoverflow.com

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