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copied!<p><strong>Essential Libraries</strong></p> <p>The main challenge for an experienced programmer coming from another language to Python is figuring out how one language maps to another. Here are a few essential libraries and how they relate to Java equivalents.</p> <pre><code>os, os.path </code></pre> <p>Has functionality like in java.io.File, java.lang.Process, and others. But cleaner and more sophisticated, with a Unix flavor. Use os.path instead of os for higher-level functionality.</p> <pre><code>sys </code></pre> <p>Manipulate the sys.path (which is like the classpath), register exit handlers (like in java Runtime object), and access the standard I/O streams, as in java.lang.System. </p> <pre><code>unittest </code></pre> <p>Very similar (and based on) jUnit, with test fixtures and runnable harnesses.</p> <pre><code>logging </code></pre> <p>Functionality almost identical to log4j with loglevels and loggers. ( logging is also in the standard java.util.Logging library)</p> <pre><code>datetime </code></pre> <p>Allows parsing and formatting dates and times, like in java.text.DateFormat, java.util.Date and related.</p> <pre><code>ConfigParser </code></pre> <p>Allows persistant configuration as in a java Properties file (but also allows nesting). Use this when you don't want the complexity of XML or a database backend.</p> <pre><code>socket, urllib </code></pre> <p>Similar functionality to what is in java.net, for working with either sockets, or retrieving content via URLs/URIs.</p> <p>Also, keep in mind that a lot of basic functionality, such as reading files, and working with collections, is in the core python language, whereas in Java it lives in packages. </p>

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