title: A use case for importing with blank identifier in golang
body: <p>The Go programming language specification states: "To import a package solely for its side-effects (initialization), use the blank identifier as explicit package name."</p>
  
  <p>For example:</p>
  
  <pre><code>import _ "foo/bar"
  </code></pre>
  
  <p>I am having difficulty imagining a use case for this construct. The accepted answer for <a href="https://stackoverflow.com/questions/24425002/usage-of-the-import-statement/24425363#24425363">Usage of the `import` statement</a> mentions a use case where a database driver may be loaded without the need for the importing program to use any of the exported functions of that package, but it leaves out the details to reader's imagination.</p>
  
  <p>Are there real life examples (with code snippets and explanation) that illustrate this use case?</p>