import re
text = r"[(u'apple',), (u'banana',)] [(u'apple',), (u'banana',), (u'abc\'def',)] \\'abc''def' \\\'abc   'abc\\\\\'def'"
for s in re.findall(r"(?<!\\)(?:\\\\)*'([^'\\]*(?:\\.[^'\\]*)*)'", text):
	print(s)