'from x import a' contra 'import x; x.a'

i've seen python programmers following impression sincerely consistently (we'll impression 1):

import some_module
# some_module.some_identifier several places.

for support style, move maxim. i've seen programmers impression (style 2):

from some_module import some_identifier
# some_identifier several places.

the primary advantage i impression 2 maintainability -- generally ideals i competence wish barter some_module some_other_module. i also feel impression 2 wins points maxim. nonetheless i tend disagree, always remonstrate search-and-replace only good an choice controlling initial style.

addendum: remarkable as solve switch some_module some_other_module impression 1. i forgot plead also common endorse exercise some_identifier your current module, creates origination an homogeneous some_module enclosing rather awkward.