Python pandas timedelta64 fillna

Question

I have a dataset with hundreds of columns. Some of the columns have timedelta64 type. When i use

fillna(0)

I got an error Passing integers to fillna for timedelta64[ns] dtype is no longer supported. To obtain the old behavior, pass pd.Timedelta(seconds=n) Passing integers to fillna for timedelta64[ns] dtype is no longer supported. To obtain the old behavior, pass pd.Timedelta(seconds=n)

How can i fix this error?

Answer 1

You may want to update the columns separately accordingly to their dtypes:

# Update inplace numeric columns
df.update(df.select_dtypes('number').fillna(0))

# Update inplace timedelta columns
df.update(df.select_dtypes('timedelta64[ns]').fillna(pd.Timedelta(seconds=0)))

Another possible syntax for updating:

df.loc[:, df.dtypes.eq(float)] = df.select_dtypes(float).fillna(0)

Answer 2

As mentioned in the error use:

df['columnname'].fillna(pd.Timedelta(seconds=0))

Passing an integer to Series.fillna() and DataFrame.fillna() with timedelta64[ns] dtypes is deprecated, will raise TypeError in a future version. Use obj.fillna(pd.Timedelta(...))