# Cannot use the Collections module

**URL:** <https://discourse.julialang.org/t/cannot-use-the-collections-module/71325>\
**Category:** New to Julia\
**Created:** [November 11, 2021, 10:48am UTC](https://discourse.julialang.org/t/cannot-use-the-collections-module/71325 "2021-11-11T10:48:42Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![magister-ludi](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/magister-ludi/32/4003_2.png) [@magister-ludi](https://discourse.julialang.org/u/magister-ludi)\
**Post date:** [November 11, 2021, 1:25pm UTC](https://discourse.julialang.org/t/cannot-use-the-collections-module/71325/2 "2021-11-11T13:25:53Z")

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It’s not really clear from just one line of code, but where does `Collections` come from? It’s not part of Julia’s `stdlib`, and doesn’t show up in [JuliaHub](https://juliahub.com/ui/Home). Is this perhaps code you’ve copied from another source?

It might be useful if you provide [a bit more context](https://discourse.julialang.org/t/please-read-make-it-easier-to-help-you/14757)

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