julia - 尝试在 Julia 中添加 Plots 包时，为什么会出现 "Unsatisfiable requirements detected for package HTTP"错误？

Question

我正在使用 Julia v1.5.2 并使用此代码添加 Plots 包

import Pkg
Pkg.add("Plots")

我收到下面给出的错误消息。
我尝试重新安装 Julia 并尝试使用其他稳定版本 (v1.0)，但我仍然收到相同类型的错误消息。我什至尝试使用 Pkg 管理器而不是使用 import Pkg ，但似乎也没什么区别。

ERROR: Unsatisfiable requirements detected for package HTTP [cd3eb016]:
 HTTP [cd3eb016] log:
 ├─HTTP [cd3eb016] has no known versions!
 └─found to have no compatible versions left with Pluto [c3e4b0f8]
   └─Pluto [c3e4b0f8] log:
     ├─possible versions are: [0.2.0, 0.3.0-0.3.6, 0.4.0-0.4.3, 0.5.0-0.5.21, 0.6.0-0.6.4, 0.7.0-0.7.10, 0.8.0-0.8.10, 0.9.0-0.9.11, 0.10.0-0.10.13, 0.11.0-0.11.14, 0.12.0-0.12.3] or uninstalled
     └─restricted to versions * by an explicit requirement, leaving only versions [0.2.0, 0.3.0-0.3.6, 0.4.0-0.4.3, 0.5.0-0.5.21, 0.6.0-0.6.4, 0.7.0-0.7.10, 0.8.0-0.8.10, 0.9.0-0.9.11, 0.10.0-0.10.13, 0.11.0-0.11.14, 0.12.0-0.12.3]
Stacktrace:
 [1] propagate_constraints!(::Pkg.Resolve.Graph, ::Set{Int64}; log_events::Bool) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Resolve\graphtype.jl:1005
 [2] propagate_constraints! at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Resolve\graphtype.jl:946 [inlined] (repeats 2 times)
 [3] simplify_graph!(::Pkg.Resolve.Graph, ::Set{Int64}; clean_graph::Bool) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Resolve\graphtype.jl:1460
 [4] simplify_graph! at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Resolve\graphtype.jl:1460 [inlined] (repeats 2 times)
 [5] resolve_versions!(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:375
 [6] targeted_resolve at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:1114 [inlined]
 [7] tiered_resolve(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:1100
 [8] _resolve at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:1120 [inlined]
 [9] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}, ::Array{Base.UUID,1}; preserve::Pkg.Types.PreserveLevel, platform::Pkg.BinaryPlatforms.Windows) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Operations.jl:1135
 [10] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}; preserve::Pkg.Types.PreserveLevel, platform::Pkg.BinaryPlatforms.Windows, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:188
 [11] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:139
 [12] #add#21 at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]
 [13] add at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]
 [14] #add#20 at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]
 [15] add at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]
 [16] add(::String; kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65
 [17] add(::String) at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65
 [18] top-level scope at REPL[19]:1

Answer 1

尝试删除 Pluto

using Pkg
pkg"rm Pluto"
pkg"add Plots"

然后更新包:

pkg"update"

我现在也会尝试明确安装 Http并检查它的版本:

pkg"add HTTP"
pkg"status HTTP"

冥王星似乎至少需要 HTTP版本 0.8.8这看起来没什么特别的。所以现在你应该可以安装回 Pluto

pkg"add Pluto"

如果有什么问题，请写出来。可以肯定的是 Pluto 正在与 Plots 一起工作。这是我的包裹状态(您可以提供类似的信息):

julia> Pkg.status.(["Pluto","HTTP","Plots"]);
Status `C:\JuliaPkg\Julia1.5.2\environments\v1.5\Project.toml`
  [c3e4b0f8] Pluto v0.12.3
Status `C:\JuliaPkg\Julia1.5.2\environments\v1.5\Project.toml`
  [cd3eb016] HTTP v0.8.19
Status `C:\JuliaPkg\Julia1.5.2\environments\v1.5\Project.toml`
  [91a5bcdd] Plots v1.6.9

有时其他一些包可能会抑制所有版本。