python 2.7 - Regex to Match Horizontal White Spaces

Question

I need a regex in Python2 to match only horizontal white spaces not newlines.

s matches all whitespaces including newlines.

>>> re.sub(r"s", "", "line 1.
line 2
")
'line1.line2'

h does not work at all.

>>> re.sub(r"h", "", "line 1.
line 2
")
'line 1.
line 2
'

[ ] works but I am not sure if I am missing other possible white space characters especially in Unicode. Such as u00A0 (non breaking space) or u200A (hair space). There are much more white space characters at the following link. https://www.cs.tut.fi/~jkorpela/chars/spaces.html

>>> re.sub(r"[ ]", "", u"line 1.
line 2
u00A0u200A
", flags=re.UNICODE)
u'line1.
line2
xa0u200a
'

Do you have any suggestions?

Answer 1

I ended up using [^S ] instead of specifying all Unicode white spaces.

>>> re.sub(r"[^S
]", "", u"line 1.
line 2
u00A0u200A
", flags=re.UNICODE)
u'line1.
line2

'

>>> re.sub(r"[ ]", "", u"line 1.
line 2
u00A0u200A
", flags=re.UNICODE)
u'line1.
line2
xa0u200a
'

It works as expected.