Indentation examples in Python for discussion http://lists.numenta.org/pipermail/nupic-hackers_lists.numenta.org/2014-September/002616.html

indentation_tips.py

# All of these examples are valid PEP-8

# Example #1

a = "a very long string with a lot of characters, more than the common 80 CPL limit."

# can be easily reformatted with parenthesis:

a = ("a very long string with a lot of characters, "
     "more than the common 80 CPL limit.")

# or

a = '''a very long string with a lot of characters,
more than the common 80 CPL limit.'''

# Example #2

if a and b and c and d and e and f and g and h and i and j and k and l and m and n:
    pass

# reformatted to:

if(a and b and c and d and e and
   f and g and h and i and j and
   k and l and m and n):
    pass

# Example #3

from a.very.nested.module.withh.a.big.longg.name import A, Lot, Of, Classes, For, Fun, And, Prosperity

# can be reformatted without using backslashes:

from a.very.nested.module.withh.a.big.longg.name import (
    A,
    Lot,
    Of,
    Classes,
    For,
    Fun,
    And,
    Prosperity)

# So you get the point, use () to easily align the code in a PEP-8 compliante way.
# Note that {} and [] indentation rules behave like ()
# Please, avoid backslashes as much as possible.