#java #class #immutable How to create an Immutable class ?

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Python namespaces & LEGB rule in Python

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What are Python namespaces? What is the LEGB rule in Python? A namespace in Python ensures that object names in a program are unique and can be used without any conflict. Python implements these namespaces as dictionaries with 'name as key' mapped to a corresponding 'object as value'. This allows for multiple namespaces to use the same name and map it to a separate object. A few examples of namespaces are as follows: Local Namespace  includes local names inside a function. the namespace is temporarily created for a function call and gets cleared when the function returns. Global Namespace  includes names from various imported packages/ modules that are being used in the current project. This namespace is created when the package is imported in the script and lasts until the execution of the script. Built-in Namespace  includes built-in functions of core Python and built-in names for various types of exceptions. The  lifecycle of a namespace  depends upon the sco...
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