If I understand your question correctly, you are having trouble splitting the fields because they are separated by 3 spaces; you can actually split on regular expressions, try using:
Coer = line.split("\s+")
\s
is the regular expression class that represents whitespace (tabs, spaces, newlines, and backspaces?)
+
means apply the previous pattern one or more times, so this expression will match one or more space characters. Using this method, it shouldn't matter how many spaces separate fields.
EDIT As mentioned below this only works if you import re and use re.split.
import re
Coer = re.split("\s+",line)