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The ``default`` argument allows providing a custom default value (as a string) which will be shown to the user and used as the return value if the user doesn't provide any other input. z/Please enter the default value as valid Python.zAccept the default 'z/' by pressing 'Enter' or provide another value.zxThe datetime and django.utils.timezone modules are available, so it is possible to provide e.g. timezone.now as a value.zType 'exit' to exit this promptz[default: {}] >>> z>>> rdrez;Please enter some code, or 'exit' (without quotes) to exit.exitr)datetimerzInvalid input: %sN) r`riformatrjr^rzevalr{r SyntaxError NameError)rrmpromptcodees r _ask_defaultz+InteractiveMigrationQuestioner._ask_default~s<   !RS     $ $&wi0)*     F    !BC-44W=    $ $VB $ 77DG""((Q FbxX*VWW#$$Y/F&&,,-@1-DEEFs1D ED<<Ec|jsF|jd|d|dddg}|dk(rtjdy|j Sy) r6z.It is impossible to add a non-nullable field 'z' to z{ without specifying a default. This is because the database needs something to populate existing rows. 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[y/N]F)ror0name)rrJrKrs rrIz/InteractiveMigrationQuestioner.ask_rename_modelsB8"" ((/*>*>@T@TU V   rc&|jddS)Nz Merging will only work if the operations printed above do not conflict with each other (working on different fields or models) Should these migration branches be merged? [y/N]F)rorNs rrMz(InteractiveMigrationQuestioner.ask_merges "" A    rc|jsH|jd|d|dddg}|dk(rtjdy |j d Sy ) rPz#It is impossible to add the field 'z' with 'auto_now_add=True' to zf without providing a default. This is because the database needs something to populate existing rows. zDProvide a one-off default now which will be set on all existing rowsrrrz timezone.now)rmNrrs rrQz8InteractiveMigrationQuestioner.ask_auto_now_add_additionst||''5j\B**46,- $L F{ (((@@rc|jsCt}|jd|d|dd|ddg}|dk(rtjdy ) rSz!Callable default on unique field .zO will not generate unique values upon migrating. 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