Commit4fbd03c

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Merge pull requestRefactoringGuru#9 from santunioni/master

remove mutable default argument in prototype __deepcopy__ method

2 parents5932a6f +7dc02cf commit4fbd03cCopy full SHA for 4fbd03c

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Lines changed: 3 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -42,7 +42,7 @@ def __copy__(self):`
`42`	`42`
`43`	`43`	`returnnew`
`44`	`44`
`45`		`-def__deepcopy__(self,memo={}):`
	`45`	`+def__deepcopy__(self,memo=None):`
`46`	`46`	`"""`
`47`	`47`	`Create a deep copy. This method will be called whenever someone calls`
`48`	`48`	`copy.deepcopy` with this object and the returned value is returned as
`@@ -54,6 +54,8 @@ def __deepcopy__(self, memo={}):`
`54`	`54`	to all the `deepcopy` calls you make in the `__deepcopy__` implementation
`55`	`55`	`to prevent infinite recursions.`
`56`	`56`	`"""`
	`57`	`+ifmemoisNone:`
	`58`	`+memo= {}`
`57`	`59`
`58`	`60`	`# First, let's create copies of the nested objects.`
`59`	`61`	`some_list_of_objects=copy.deepcopy(self.some_list_of_objects,memo)`

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