37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
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from ...core.operator import is_operator
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from functools import partial
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from ...core.str2 import concurent_broadcast, lookforNumbers, pparser, missing_times, lookfor
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from ...core.coroutine import STOOOP
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from ...core.MO import moify_cor
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from .leaf import look_for_rdleaf
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def rdstr2(sink):
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""" Return a pipeline which parse random expression and with sink as endpoint
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:example:
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>>> from ...core.str2 import list_sink
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>>> rdstr2list = rdstr2(list_sink)
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>>> rdstr2list("{a}+{a*b}-2")
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[<RdLeaf a>, '+', <RdLeaf a*b>, '+', <MOnumber -2>]
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>>> rdstr2list("{a}({b}x+{c})")
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[<RdLeaf a>, '*', [<RdLeaf b>, '*', <MOstr x>, '+', <RdLeaf c>]]
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"""
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lfop = lookfor(is_operator)
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operator_corout = partial(concurent_broadcast, lookfors=[lfop])
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def pipeline(expression):
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str2_corout = look_for_rdleaf(
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lookforNumbers(operator_corout(
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missing_times(moify_cor(pparser(sink)))))
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)
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for i in expression.replace(" ", ""):
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str2_corout.send(i)
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a = str2_corout.throw(STOOOP)
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return a
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return pipeline
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