from typing import Optional
from ..interface import verb_required_block
from ..interpreter import Context
[docs]class SubstringBlock(verb_required_block(True, parameter=True)):
ACCEPTED_NAMES = ("substr", "substring")
def process(self, ctx: Context) -> Optional[str]:
try:
if "-" not in ctx.verb.parameter:
return ctx.verb.payload[int(float(ctx.verb.parameter)) :]
spl = ctx.verb.parameter.split("-")
start = int(float(spl[0]))
end = int(float(spl[1]))
return ctx.verb.payload[start:end]
except:
return