In this quiz, you'll test your understanding of the Python Global Interpreter Lock (GIL). The GIL behaves like a mutex that allows only one thread to hold the control of the Python interpreter. This has advanta
. CPython implementation of this rule can be found hereWhen a and b are set to "wtf!" in the same line, the Python interpreter creates a new object, then references the second variable at the same time. If you do it on separate lines, it doesn't "know" that there's already "wtf...
Thus, where a compiler translates and executes the entire source code into machine code or bytecode, an interpreter does the same line by line. This difference in operation can be both an advantage and a disadvantage for programmers. Since a compiler runs the entire code at the same time, t...
How does Python's__name__variable work? The__name__variable is a special attribute managed by the Python runtime. When a developer executes a Python program, the interpreter sets several variables, including__name__.There are two outcomes for the__name__variable: If the script is run as...
In fact, when you evaluate a raw string literal in the Python REPL, the interpreter automatically escapes each backslash in the shown output:Python >>> r"Hello\nWorld" 'Hello\\nWorld' This is the canonical way of representing backslash characters in Python strings. Remember that raw strings...
This article explains what the Python code expression if __name__ == '__main__' means.A Python programme uses the condition if __name__ == '__main__' to only run the code inside the if statement when the program is run directly by the Python interpreter. The code inside the if ...
Python 3.x, the current and future incarnation of the language, has many useful and important features not found in Python 2.x, such as new syntax features (e.g., the “walrus operator”), better concurrency controls, and a more efficient interpreter. Python 3 adoption was slowed for the...
PyPy is a drop-in replacement for the stock Python interpreter, and it runs many times faster on some Python programs.
what does <__name__ == "__main__"> do? When your script is run by passing it as a command to the Python interpreter, python myscript.py all of the code that is at indentation level 0 gets executed. Functions and classes that are defined are, well, defined, but none of their ...
When working with statements like these, keep in mind that the Python interpreter does the calculation and then regards the statement as the result of the calculation. In other words, Python replaces the original statement with actual values. With more programming experience, you’ll start looking...