BTW, here's how a session looks using method 4's change:

>>> varname = asdf“d“a”t”apoint
  File "<stdin>", line 1
    varname = asdf“d“a”t”apoint
              ^
SyntaxError: invalid character in identifier
>>> varname = asdf“d“a”t”apoint.evidence
  File "<stdin>", line 1
    varname = asdf“d“a”t”apoint.evidence
              ^
SyntaxError: invalid character in identifier
>>> varname = $d$a$t$apoint
  File "<stdin>", line 1
    varname = $d$a$t$apoint
              ^
SyntaxError: invalid syntax
>>> varname = asdf$d$a$t$apoint
  File "<stdin>", line 1
    varname = asdf$d$a$t$apoint
                  ^
SyntaxError: invalid syntax
>>> varname = 0o1234987654 + 123
  File "<stdin>", line 1
    varname = 0o1234987654 + 123
                    ^
SyntaxError: invalid syntax
>>> varname = "asdf" + "qwer
  File "<stdin>", line 1
    varname = "asdf" + "qwer
                       ^
SyntaxError: EOL while scanning string literal