pandas.DataFrame.fillna()

Question 1

Describe what the method .fillna() does ?

Answer 1

Fill NA / NaN values using the specified method

Question 2

what is the first param. in the method .fillna()?

Answer 2

value=

Question 3

what are the acceptable inputs to the param. value= ?

Answer 3

scalar, dict, Series, or Dataframe

Question 4

what is the 2nd param. to the method .fillna()

Answer 4

method

Question 5

what does the param. method do?

Answer 5

It determines the method you want to fill in holes in reindexed Series.

Question 6

what input for the method param propagates last valid observation forward to the next valid obersevation?

Answer 6

pad or ffill

Question 7

What input for the param. method uses the next valid observation to fill in the gap?

Answer 7

backfill or bfill

Question 8

what is the third param. of .fillna() and what does it determine?

Answer 8

axis,

axis along which to fill missing values

Question 9

what is the fifth param of .fillna() and what does it determine?

Answer 9

limit,

if the method is specified, this is the max number of consecutive NaN values to forward/backward fill.

Question 10

what parameter cannot be a list in .fillna()?

Answer 10

value

Question 11

If I specify the param. method of .fillna() do I need to give the param. value an input?

Answer 11

No