10 examples of 'nested for loop in python' in Python

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365def FOR(self, node):
366 """
367 Process bindings for loop variables.
368 """
369 vars = []
370 def collectLoopVars(n):
371 if hasattr(n, 'name'):
372 vars.append(n.name)
373 else:
374 for c in n.getChildNodes():
375 collectLoopVars(c)
376
377 collectLoopVars(node.assign)
378 for varn in vars:
379 if (isinstance(self.scope.get(varn), Importation)
380 # unused ones will get an unused import warning
381 and self.scope[varn].used):
382 self.report(messages.ImportShadowedByLoopVar,
383 node.lineno, varn, self.scope[varn].source.lineno)
384
385 self.handleChildren(node)
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383def test_nested_for() -> None:
384 src = """
385 for i in range(10):
386 for i in range(5):
387 print(i)
388 else:
389 print(i - 1)
390 else:
391 print(i + 1)
392 """
393 cfg = build_cfg(src)
394
395 expected_blocks = [
396 ["range(10)"],
397 ["i"],
398 ["range(5)"],
399 ["i"],
400 ["print(i)"],
401 ["print(i - 1)"],
402 ["print(i + 1)"],
403 []
404 ]
405 assert expected_blocks == _extract_blocks(cfg)
406
407 expected_edges = [
408 [["range(10)"], ["i"]],
409 [["i"], ["range(5)"]],
410 [["range(5)"], ["i"]],
411 [["i"], ["print(i)"]],
412 [["print(i)"], ["i"]],
413 [["i"], ["print(i - 1)"]],
414 [["print(i - 1)"], ["i"]],
415 [["i"], ["print(i + 1)"]],
416 [["print(i + 1)"], []]
417 ]
418 assert expected_edges == _extract_edges(cfg)
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)
60def nested_forloop_after(x):
61 for x in _getiter_([1, 2, 3]):
62 for y in _getiter_("abc"):
63 pass
285def _For(self, t):
286 self.fill("for ")
287 self.dispatch(t.target)
288 self.write(" in ")
289 self.dispatch(t.iter)
290 self.body(t.body)
291 if t.orelse:
292 self.fill("else")
293 self.body(t.orelse)
88def visit_For(self, node):
89 self.make_tab()
90 self.write('for ')
91 self.visit(node.target)
92 self.write(' in ')
93 self._in_args = True
94 self.visit(node.iter)
95 self._in_args = False
96 self.write(':\n')
97 self._indent += 1
98 for n in node.body:
99 self.visit(n)
100 self._indent -= 1
45def create_comprehension(for_node: ast.For) -> ast.comprehension:
46 return ast.comprehension(target=for_node.target, iter=for_node.iter, ifs=[])
69def test_for():
70 src = dedent("""\
71 for a in [1,2]:
72 a
73
74 for a1 in 1,"":
75 a1
76 """)
77 check_p(src, 1)
677def visitGenExprFor(self, node):
678 start = self.newBlock()
679 anchor = self.newBlock()
680 end = self.newBlock()
681 self.setups.push((LOOP, start))
682 self.emit('SETUP_LOOP', end)
683 if node.is_outmost:
684 self.loadName('.0')
685 else:
686 self.visit(node.iter)
687 self.emit('GET_ITER')
688 self.nextBlock(start)
689 self.set_lineno(node, force=True)
690 self.emit('FOR_ITER', anchor)
691 self.nextBlock()
692 self.visit(node.assign)
693 return (start, anchor, end)
39def for_loop(self, typename, iname, ibegin, iend):
40 return "for (%s %s = %s; %s < %s; ++%s)" % (typename, iname, ibegin, iname, iend, iname)

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