cmd10.sc:12: reference to Data is ambiguous;

[lizhirui]

in "2.5_exercise.ipynb","DSPBlock" examples,when i run that code,i got many error messages:
cmd10.sc:12: reference to Data is ambiguous;
it is imported twice in the same scope by
import root.chisel3.{Reg, Bool, withClockAndReset, assert, fromStringToLiteral, ExplicitCompileOptions, util, chiselTypeOf, Hexadecimal, Character, shim, IgnoreSeqInBundle, SyncReadMem, stop, RequireAsyncReset, fromBigDecimalToLiteralInterval, AutoClonetypeException, MixedDirectionAggregateException, SpecifiedDirection, ModuleAspect, fromIntToWidth, fromDoubleToLiteral, fromIntToLiteral, Output, Mux, withReset, Wire, HasChiselExecutionOptions, PrintableHelper, getModulePorts, Record, FullName, fromDoubleToLiteralInterval, fromLongToLiteral, Mem, Clock, UIntFactory, BoolFactory, withClock, Input, fromLongToLiteralInterval, Driver, fromIntToLiteralInterval, WhenContext, FirrtlFormat, Data, ChiselExecutionSuccess, printf, testers, NumObject, fromIntToBinaryPoint, Printables, fromBigDecimalToLiteral, internal, ExpectedHardwareException, BindingException, Binary, Element, WireDefault, core, aop, RebindingException, VecFactory, BackendCompilationUtilities, Flipped, Module, fromBigIntToLiteral, Num, ChiselExecutionResult, ResetType, Percent, iotesters, Printable, tester, fromBigIntToLiteralInterval, AliasedAggregateFieldException, RegNext, string2Printable, MonoConnectException, ActualDirection, RawModule, InstanceId, getDataElements, Bits, Name, Vec, stage, Bundle, UInt, VecInit, PString, SIntFactory, ChiselException, dontTouch, ChiselExecutionOptions, SInt, ExpectedChiselTypeException, Reset, Decimal, SourceInfoDoc, Aggregate, fromBooleanToLiteral, CompileOptions, WireInit, BuildInfo, RequireSyncReset, DontCare, AsyncReset, when, BiConnectException, VecLike, WireFactory, ChiselExecutionFailure, BlackBox, MultiIOModule, RegInit, MemBase}
and import root.almond.display.{Data, Display, FileLink, Html, IFrame, Image, Javascript, Json, Latex, Markdown, Math, PrettyPrint, ProgressBar, Svg, Text, TextDisplay, UpdatableDisplay}
abstract class FIRBlock[D, U, EO, EI, B <: Data](val nFilters: Int, val nTaps: Int)(implicit p: Parameters)
^Compilation Failed

[lizhirui]

in "2.6_chiseltest.ipynb",the example "A queue example" has same problem

[lizhirui]

change "Data" to "chisel3.Data" can solve this problem in every reference to "Data"