Convert a multi-line string to a single-line string

Question

I am using the Google App Engine and I need to put a multi-line string in the data store. Unfortunately, GAE does not allow this. I need this line to be multi-line, so is there a way to convert a multi-line line to one line and store it?

Answer 1

You do not need a conversion:

google.appengine.ext.db.StringProperty (multi-line = true)

Answer 2

Replace all newline characters with "\ n" and replace all "\" with "\\", as with string literals:

def encode(s):
    return s.replace("\\", "\\\\").replace("\n", "\\n")
def decode(s):
    return s.replace("\\\\", "\\").replace("\\n", "\n")