ASCII information separators, hex codes 1C through 1F are classified as space:

>>> all(c.isspace() for c in '\N{FS}\N{GS}\N{RS}\N{US}')
True

but int()/float() do not accept strings with leading or trailing separators:

>>> int('123\N{RS}')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '123\x1e'

This is probably because corresponding bytes values are not classified as whitespace:

>>> any(c.encode().isspace() for c in '\N{FS}\N{GS}\N{RS}\N{US}')
False