replace some val;ues with 0 in a column in pandas code example
Example 1: replace "-" for nan in dataframe
df.replace(np.nan,0)
Example 2: how to replace zero value in python dataframe
nonzero_mean = df[ df.col != 0 ].mean()
df.replace(np.nan,0)
nonzero_mean = df[ df.col != 0 ].mean()