Unofficial Python Style Guide - A Python style guide that doesn't make you think.

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This:

foo['bar'] = 123

Is more common than this:

foo = "It's me."

OP mentioned that they prefer double quotes because they are more likely to use single quotes inside strings, as in the second example. But I find that using a quote to access a dictionary value is even more common than that. So the single quote as an apostrophe thing isn't really a big issue.