搜索替换 csv 文件中的文本

【问题】

I just started with Python 3.4.2 and trying to find and replace text in csv file.

In Details,Input.csvfile contain below line:

0,0,0,13,.\New\_Path-1.1.12\Impl\Appli\Library\Module_RM\Code\src\Exception.cpp
0,0,0,98,.\Old_Path-1.1.12\Impl\Appli\Library\Prof_bus\Code\src\Wrapper.cpp
0,0,0,26,.\New_Path-1.1.12\Impl\Support\Custom\Vital\Code\src\Interface.cpp
0,0,0,114,.\Old_Path-1.1.12\Impl\Support\Custom\Cust\Code\src\Config.cpp

I maintained my strings to be searched in other file namedlist.csv

Module_RM
Prof_bus
Vital
Cust

Now I need to go through each line ofInput.csvand replace the last column with the matched string.

So my end result should be like this:

0,0,0,13,Module_RM
0,0,0,98,Prof_bus
0,0,0,26,Vital
0,0,0,114,Cust

I read the input files first line as a list. So text which i need to replace came inline[4]. I am reading each module name in thelist.csvfile and checking