how to fill nan in a column pandas code example

Example 1: replace "-" for nan in dataframe

df.replace(np.nan,0)

Example 2: how to replace nan values with 0 in pandas

df.fillna(0)

Example 3: pandas fill blanks with zero

column.fillna(0, inplace=True)

Example 4: df.fillna(-999,inplace=True)

df2.replace(-999, np.nan, inplace=True)
df2.fillna(df2.mean())

    EventId A       B        C
0   100000  0.91    124.711  2.666000
1   100001  0.91    124.711 -0.202838
2   100002  0.91    124.711 -0.202838
3   100003  0.91    124.711 -0.202838