RegExp question

[John Machin]

Precise? The OP asked for "tokens".

#>>> re.search(r"(and|or|xor)\s*#", "a = the_operand # gotcha!")
#<_sre.SRE_Match object at 0x00AE6620>

Try this:

#>>> re.search(r"\b(and|or|xor)\s*#", "a = the_operand # should fail")
#>>> re.search(r"\b(and|or|xor)\s*#", "and # OK")
#<_sre.SRE_Match object at 0x00AE6E60>
#>>> re.search(r"\b(and|or|xor)\s*#", "blah blah and # OK")
#<_sre.SRE_Match object at 0x00AE66E0>