tf.errors.FailedPreconditionError

Raised when some prerequisites are not met when running an operation.

Inherits From: OpError

tf.errors.FailedPreconditionError(
    node_def, op, message, *args
)

This typically indicates that system is not in state to execute the operation and requires preconditions to be met before successfully executing current operation.

For example, this exception is commonly raised when running an operation that reads a tf.Variable before it has been initialized.

error_code The integer error code that describes the error.
experimental_payloads A dictionary describing the details of the error.
message The error message that describes the error.
node_def The NodeDef proto representing the op that failed.
op The operation that failed, if known.