根据列中的值填充另一个 dataframe 的值

Question

Hey I have dataframe like this

   Descriptions
1. i am going in car
2. He will go for match
3. D-1799
4. nothing better
5. SS-1428
6. going towards the office
7. GTY6QD12

and another Dataframe which has codes mentioned in above dataframne with the descriptions in next column.

   code           Description
1. D-1799      he is moving now
2. SS-1428     they will have some
3. GTY6QD12    is it well now

I want First Dataframe to be filled with the codes descriptions from 2nd Dataframe based on code. Required result should be like this.

   Descriptions
1. i am going in car
2. He will go for match
3. he is moving now
4. nothing better
5. they will have some
6. going towards the office
7. is it well now

Answer 1

Use Series.replace by Series from df2 created by DataFrame.set_index and selecting Descriptions column:

s = df2.set_index('code')['Description']
df1['Descriptions'] = df1['Descriptions'].replace(s)
print (df1)
               Descriptions
0         i am going in car
1      He will go for match
2          he is moving now
3            nothing better
4       they will have some
5  going towards the office
6            is it well now

If need substring replacement add regex=True :

df1['Descriptions'] = df1['Descriptions'].replace(s, regex=True)