example file (.csv): in row[0] there is "d e f b c c c a"
file=open("example_file.csv","r")
column=""
for row in file:
    if "a" or "b" or "c" in row[0]:
        column+=row 
I'm trying to figure out a way that if the file has a,b or c in the row it will print only the a's b's or c's
 
    