[python] how to read a long multiline string line by line in python

I have a wallop of a string with many lines. How do I read the lines one by one with a for clause? Here is what I am trying to do and I get an error on the textData var referenced in the for line in textData line.

for line in textData
    print line
    lineResult = libLAPFF.parseLine(line)

The textData variable does exist, I print it before going down, but I think that the pre-compiler is kicking up the error.

TIA

Dennis

This answer fails in a couple of edge cases (see comments). The accepted solution above will handle these. str.splitlines() is the way to go. I will leave this answer nevertheless as reference.

Old (incorrect) answer:

s =  \
"""line1
line2
line3
"""

lines = s.split('\n')
print(lines)
for line in lines:
    print(line)

by splitting with newlines.

for line in wallop_of_a_string_with_many_lines.split('\n'):
  #do_something..

if you iterate over a string, you are iterating char by char in that string, not by line.

>>>string = 'abc'
>>>for line in string:
    print line

a
b
c