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1966804
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2009-12-27T19:40:41.770
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2009-12-27T19:40:41.770
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Python does not automatically recurse and import subpackages. When you say: <pre><code>import packagename </code></pre> That is all it imports. If you say: <pre><code>import packagename.modulename </code></pre> Then it first imports <code>packagename</code>, then imports <code>packagename.modulename</code> and assignes a reference to it as an attribute of <code>packagename</code>. Therefore, when you say in code: <pre><code>packagename.modulename.Someclass() </code></pre> Python is just using 100% normal attribute lookups. First lookup the <code>packagename</code> variable in the current namespace. Then lookup the <code>modulename</code> attribute of the <code>packagename</code> object. Then lookup the <code>Someclass</code> attribute of the <code>modulename</code> object. If you neglected to import <code>packagename.modulename</code>, then there is plainly no attribute on <code>packagename</code> called <code>modulename</code>, and henceforth the <code>AttributeError</code>. I suggest you pop onto the command line and import something, then use <code>dir()</code> to examine it. Then import a subpackage, and use <code>dir()</code> again. You will quickly see the difference. <hr> Lastly, the syntax: <pre><code>from packagename.modulename import SomePackage </code></pre> Is essentially the same as this: <pre><code>import packagename.modulename SomePackage = packagename.modulename.SomePackage </code></pre> (of course, it's implemented differently, but more or less the same result). Does that help?
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1. POWhy I can't call packagename.modulename.foo()?
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1. USgahooa
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1. CO@gahooa: Thank you for your answer, but is there any way to import all modules from package in separate namespace? Something like "import packagename.*"
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