“Pandas relleno” Código de respuesta

Pandas relleno

# axis=1 means fillna by rows
df = df.fillna(axis=1, method='backfill')
df = df.fillna(axis=1, method='ffill')

# methods
# pad / ffill: propagate last valid observation forward to next valid.
# backfill / bfill: use next valid observation to fill gap.