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Yes, Python 3 is considered a general-purpose language because it can be used for a wide variety of applications, from web development to scientific computing, making it versatile and adaptable to different tasks.

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In Python, to define a block of code we use indentation. Indentation refers to whitespaces at the beginning of the line.

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Many languages have been implemented using both compilers and interpreters, including C, Pascal, and Python.

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The def keyword is used to create, (or define) a function in python.

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Standard libraries in Python provide a rich set of modules and functions that allow developers to perform common tasks without needing to write code from scratch. This enhances productivity and makes Python suitable for a broad range of applications.

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Python supports the creation of anonymous functions (i.e. functions that are not bound to a name) at runtime, using a construct called lambda. Lambda functions are restricted to a single expression. They can be used wherever normal functions can be used.

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The binary form of 1 is 0001. The expression x<<2 implies we are performing bitwise left shift on x. This shift yields the value: 0100, which is the binary form of the number 4.

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‘.py’ is the correct extension of the Python file. Python programs can be written in any text editor. To save these programs we need to save in files with file extension ‘.py’.

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Python's interpreted nature allows for quick iteration and prototyping, which is invaluable in research and development phases. Developers can test and modify their code on the fly without the need for a separate compilation step.

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SyntaxError, there shouldn’t be a space between + and = in +=.