How to use 'python parallel for loop' in Python

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33def test_parallel_for():
34 def looping_function(payload):
35 i, j = payload
36 time.sleep(1)
37 return i + j
38
39 parameters = [(i, i + 1) for i in range(50)]
40 out = parallel_for(looping_function, parameters)
41 assert out == [2 * i + 1 for i in range(50)]
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258def emit_sequential_loop(self, codegen_state, iname, iname_dtype,
259 lbound, ubound, inner):
260 ecm = codegen_state.expression_to_code_mapper
261
262 from pymbolic.mapper.stringifier import PREC_NONE, PREC_SUM
263 from genpy import For
264
265 return For(
266 (iname,),
267 "range(%s, %s + 1)"
268 % (
269 ecm(lbound, PREC_NONE, "i"),
270 ecm(ubound, PREC_SUM, "i"),
271 ),
272 inner)

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