5 examples of 'reverse for loop in python' in Python

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60def nested_forloop_after(x):
61 for x in _getiter_([1, 2, 3]):
62 for y in _getiter_("abc"):
63 pass
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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
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)
186@dispatch(ast.For)
187def visitFor(self, node):
188 normalF, breakF = self.flow.popSplit()
189
190 self.flow.restore(normalF)
191 else_ = self(node.else_)
192 inital = self.flow.pop()
193
194 # Save the old loop points, and set new ones.
195 oldBreak = self.flow.bags.get('break', [])
196 self.flow.bags['break'] = [breakF]
197 oldContinue = self.flow.bags.get('continue', [])
198
199
200 # Iterate until convergence
201
202 current = inital.split()
203 while 1:
204 # TODO undef the index?
205 self.flow.bags['continue'] = [current.split()]
206 self.flow.restore(current.split())
207
208 body = self(node.body)
209
210 index = self(node.index)
211 bodyPreamble = self(node.bodyPreamble)
212
213 # HACK
214 #self.flow.undefine(node.index)
215
216 loopEntry = self.flow.pop()
217 current, changed = meet(self.meet, current, loopEntry)
218
219 if not changed:
220 break
221
222
223 self.flow.restore(current)
224
225 # Restore the loop points
226 self.flow.bags['break'] = oldBreak
227 self.flow.bags['continue'] = oldContinue
228
229 # HACK horrible!
230 self.strategy.marker(node.iterator)
231
232 iterator = self(node.iterator)
233 loopPreamble = self(node.loopPreamble)
234
235 return ast.For(iterator, index, loopPreamble, bodyPreamble, body, else_)
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)

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