a = "\u0030" #unicode for 0

b = "\u00B2" #unicode for ²

c = "10km2"

d = "-1"

e = "1.5"

​

print(a.isnumeric())

print(b.isnumeric())

print(c.isnumeric())

print(d.isnumeric())

print(e.isnumeric())

​