SyntaxError: invalid character in identifier [closed]

Answer 1

Your minus is not a minus. It's a "em dash". Try replacing this '—' with '-'.

Answer 2

Assuming the character between 1.0 and x is supposed to be a minus sign, replace it with an actual minus sign.

Answer 3

Use the correct character for you minus operator: -. You are using some other 'dash' character that the interpreter is considering just a name like y or x. But it is invalid!

>>> bad_minus = "—"
>>> good_minus = "-"
>>> bad_minus == good_minus
False
>>> ord(good_minus)
45
>>> ord(bad_minus)
8212
>>>