python convert nan to empty string

# Option 1
df1 = df.replace(np.nan, '', regex=True) # All data frame

# Option 2
df[['column1','column2']] = df[['column1','column2']].fillna('') # Specific columns

Here is what the above code is Doing:
1. First, we’re using the replace() method to replace all the NaN values with blank strings.
2. Then, we’re using the fillna() method to replace all the blank strings with NaN values again.
3. Finally, we’re using the replace() method to replace all the NaN values with blank strings.

Note that this code will replace all the NaN values in your DataFrame with blank strings.

If you want to replace the NaN values with something else, you can use the following code: