Help needed to retrieve text from a text-file using RegEx

[Oltmans]

Here is the scenario:

It's a command line program. I ask user for a input string. Based on
that input string I retrieve text from a text file. My text file looks
like following

Text-file:
-------------
AbcManager=C:\source\code\Modules\Code-AbcManager\
AbcTest=C:\source\code\Modules\Code-AbcTest\
DecConnector=C:\source\code\Modules\Code-DecConnector\
GHIManager=C:\source\code\Modules\Code-GHIManager\
JKLConnector=C:\source\code\Modules\Code-JKLConnector

-------------

So now if I run the program and user enters

DecConnector

Then I'm supposed to show them this text "C:\source\code\Modules\Code-
DecConnector" from the text-file. Right now I'm retrieving using the
following code which seems quite ineffecient and inelegant at the same
time

 with open('MyTextFile.txt') as file:

                for line in file:

                    if mName in line: #mName is the string that
contains user input

                        Path =str(line).strip('\n')

                        tempStr=Path

                        Path=tempStr.replace(mName+'=',"",1)

I was wondering if using RegEx will make this look better. If so, can
you please suggest a Regular Expression for this? Any help is highly
appreciated. Thank you.