If speed is an issue, it’s way faster to bypass inspect module. testing depth: 50 (CPython 3.7.3) stacksize4b() | depth: 50 | 2.0 µs stacksize4b(200) | depth: 50 | 2.2 µs stacksize3a() | depth: 50 | 2.4 µs stacksize2a() | depth: 50 | 2.9 µs stackdepth2() | depth: 50 | 3.0 µs stackdepth1() | depth: … Read more
Just read the PyCharm’s Docs. https://www.jetbrains.com/pycharm/quickstart/configuring_interpreter.html Step by step: Go to Settings. Go to the section Project Interpreter . Click on the plus (+) button and select the Local option. Search for the interpreter, in Linux it is used to be in /usr/bin/python or /usr/bin/pythonX.Y where X and Y are the version. In Windows, it … Read more
CPython is the implementation of Python in C. It’s the first implementation, and still the main one that people mean when they talk about Python. It compiles .py files to .pyc files. .pyc files contain bytecodes. The CPython implementation also interprets those bytecodes. CPython is not written in C++, it is C. The compilation from … Read more
Short answer: The fundamental reading list for a lisp interpreter is SICP. I would not at all call it overkill, if you feel you are overqualified for the first parts of the book jump to chapter 4 and start interpreting away (although I feel this would be a loss since chapters 1-3 really are that … Read more
Estimating how long something like that might take is dependent on many different factors. For example, an experienced programmer can easily knock out a simple arithmetic expression evaluator in a couple of hours, with unit tests. But a novice programmer may have to learn about parsing techniques, recursive descent, abstract representation of expression trees, tree-walking … Read more
For the case of Python, source files are compiled before being executed (the .pyc files), and the comments are stripped in the process. So comments could slow down the compilation time if you have gazillions of them, but they won’t impact the execution time.
Of course, you can use scala -cp whatever and manually manage your dependencies. But that gets quite tedious, especially if you have multiple dependencies. A more flexible approach is to use sbt to manage your dependencies. Search for the library you want to use on search.maven.org. Algebird for example is available by simply searching for … Read more
In IDLE, go to Options -> Configure IDLE -> Keys and there select history-next and then history-previous to change the keys. Then click on Get New Keys for Selection and you are ready to choose whatever key combination you want.
In the Python interactive prompt, if you return a string, it will be displayed with quotes around it, mainly so that you know it’s a string. If you just print the string, it will not be shown with quotes (unless the string has quotes in it). >>> 1 # just a number, so no quotes … Read more
There are two different issues: First: Dynamic binding as a bug Not sure what he means, but generally in McCarthy’s EVAL the use of dynamic binding can be seen as a bug. He does not implement lexical scope for variables. The bug shows up for example here: http://www-formal.stanford.edu/jmc/recursive/node3.html See the functions maplist and diff. Both … Read more