# Find packages by function names

**URL:** <https://discourse.julialang.org/t/find-packages-by-function-names/48823>\
**Category:** New to Julia\
**Tags:** question\
**Created:** [October 22, 2020, 2:25pm UTC](https://discourse.julialang.org/t/find-packages-by-function-names/48823 "2020-10-22T14:25:48Z")\
**Posts on this page:** 1\
**Showing post:** 5

<div class="post-metadata">

**Author:** ![oxinabox](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/oxinabox/32/206603_2.png) [@oxinabox](https://discourse.julialang.org/u/oxinabox)\
**Post date:** [October 22, 2020, 4:45pm UTC](https://discourse.julialang.org/t/find-packages-by-function-names/48823/5 "2020-10-22T16:45:58Z")

</div>

Similarly you can also load the package you are using and ask it where it got something from.

Referring to it by qualified name of the scope where you find it.

Say I say `isposdef` being used in the source code of Distributions.jl and i wanted to know where it came from:

```julia
julia> using Distributions

julia> @which Distributions.isposdef
LinearAlgebra

julia> methods(Distributions.isposdef)
# 7 methods for generic function "isposdef":
[1] isposdef(D::LinearAlgebra.Diagonal) in LinearAlgebra at /usr/local/src/julia/julia-1.5/usr/share/julia/stdlib/v1.5/LinearAlgebra/src/diagonal.jl:119
[2] isposdef(A::AbstractArray{T,2} where T) in LinearAlgebra at /usr/local/src/julia/julia-1.5/usr/share/julia/stdlib/v1.5/LinearAlgebra/src/dense.jl:91
[3] isposdef(x::Number) in LinearAlgebra at /usr/local/src/julia/julia-1.5/usr/share/julia/stdlib/v1.5/LinearAlgebra/src/dense.jl:93
[4] isposdef(A::Union{LinearAlgebra.Eigen, LinearAlgebra.GeneralizedEigen}) in LinearAlgebra
 at /usr/local/src/julia/julia-1.5/usr/share/julia/stdlib/v1.5/LinearAlgebra/src/eigen.jl:126
[5] isposdef(C::Union{LinearAlgebra.Cholesky, LinearAlgebra.CholeskyPivoted}) in LinearAlgebra at /usr/local/src/julia/julia-1.5/usr/share/julia/stdlib/v1.5/LinearAlgebra/src/cholesky.jl:551
[6] isposdef(J::LinearAlgebra.UniformScaling) in LinearAlgebra at /usr/local/src/julia/julia-1.5/usr/share/julia/stdlib/v1.5/LinearAlgebra/src/uniformscaling.jl:109
[7] isposdef(F::SuiteSparse.CHOLMOD.Factor) in SuiteSparse.CHOLMOD at /usr/local/src/julia/julia-1.5/usr/share/julia/stdlib/v1.5/SuiteSparse/src/cholmod.jl:1812

```

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