Some measures of symbolic expression complexity. Each complexity measure is expected to take a symbolic expression as an argument, and return a number.
Returns the length of expr after converting it to a string.
INPUT:
OUTPUT:
A real number representing the complexity of expr.
RATIONALE:
If the expression is longer on-screen, then a human would probably consider it more complex.
EXAMPLES:
This expression has three characters, x, ^, and 2:
sage: from sage.symbolic.complexity_measures import string_length
sage: f = x^2
sage: string_length(f)
3