file_name = ['abc','xyz','pqr','mno','def','ghi','rst','uvw','jkl']
path = []

count = 0
while count < 9:
    path[count] = "D:\Work\"+file_name[count]+".csv"
    print (path[count])
    count = count + 1

D:\Work\abc.csv
D:\Work\xyz.csv
D:\Work\pqr.csv
D:\Work\mno.csv
D:\Work\def.csv
D:\Work\ghi.csv
D:\Work\rst.csv
D:\Work\uvw.csv
D:\Work\jkl.csv

file_name = ['abc','xyz','pqr','mno','def','ghi','rst','uvw','jkl']
path = []

count = 0
while count < 9:
    path.append("D:\Work\"+file_name[count]+".csv")
    print (path[count])
    count = count + 1

file_name = ['abc','xyz','pqr','mno','def','ghi','rst','uvw','jkl']
path = []

for item in file_name:
    newpath = "D:\Work\" + item + ".csv"
    path.append(newpath)
    print(newpath)