See the guide: Variables > Variable helper functions

Returns an Op to check if variables are initialized.

NOTE: This function is obsolete and will be removed in 6 months. Please change your implementation to use report_uninitialized_variables().

When run, the returned Op will raise the exception FailedPreconditionError if any of the variables has not yet been initialized.


  • var_list: List of Variable objects to check. Defaults to the value of global_variables().


An Op, or None if there are no variables.

Defined in tensorflow/python/ops/