interpreter

Interpreting assembly code [closed]

由 谁说我不能喝 提交于 2019-11-28 01:54:54
问题 Any assembly interpreters out there? What I'm looking for: I have some assembly firmware code I want to run, but not on the actual hardware. I would like to run the code and see what it is doing. So, is there some sort of free and easy to use assembly simulator out there? Any other pointers you can think of? 回答1: You should look into some processor emulator only that way you can "interpret" assembly, for example: Qemu or Bochs 回答2: In order to run assembly code that is designed for a

Python function calling order

由 给你一囗甜甜゛ 提交于 2019-11-28 01:50:58
问题 How does Python "read in" a program when you run it? For example, I don't understand why there wouldn't be a NameError: name 'cough' is not defined in the below code: def main(): for i in range(3): cough() def cough(): print('cough') if __name__ == '__main__': main() Basically, my question can also be stated as why do the above and below programs output the same thing: def cough(): print('cough') def main(): for i in range(3): cough() if __name__ == '__main__': main() 回答1: Python is an

How to get the full path to php interpreter / binary without shell access

由 谁说我不能喝 提交于 2019-11-27 23:33:18
问题 How can I get the full path to php interpreter from a php script (no command line access). What I need to do is: $foo = "/usr/bin/php"; echo $foo; But I need to get the path first so I can assign it to foo. If you have a solution that works on both Windows and nix even better but if not, nix would be fine. Before you ask, Asking the host is out of the question No shell access The problem is that using whatever it outputs doesn't work. For example PHP_BINDIR will output /usr/bin but using /usr

sandboxing/running python code line by line

由 谁说我不能喝 提交于 2019-11-27 20:34:51
问题 I'd love to be able to do something like these two are doing: Inventing on principle @18:20 , Live ClojureScript Game Editor If you don't wanna check the videos, my problem is this: Say I had this code: .... xs = [] for x in xrange(10): xs.append(x) ... I'd like to make an environment where I can execute the code, statement for statement and watch/trace the locals/globals as they change. Maybe give it a list of vars to keep track of in the locals/globals dictionaries. Like stepping through

Does a browser truly read JavaScript line by line OR does it make multiple passes?

由 我的未来我决定 提交于 2019-11-27 20:02:22
问题 I understand that JavaScript is interpreted and not compiled. No problem there. However, I keep reading here that JavaScript is executed "on the fly" and that lines are read one at a time. This idea is confusing me quite a bit when it comes to the following example: writeToConsole(); function writeToConsole() { console.log("This line was reached."); } For the record, this bit of code will write to the console just fine. Still, how would the browser know of the existence of exampleFunction()

How can I embed a python interpreter frame in python using tkinter?

由 白昼怎懂夜的黑 提交于 2019-11-27 18:09:57
问题 I want to add a control terminal widget to my pure python+tkinter application similar to the python interpreter provided in Blender. It should be running within the same context (process) so the user can add features and control the application that is currently running from the control widget. Ideally I'd like it to also "hijack" stdout and stderr of the current application so it will report any problems or debugging information within the running application. This is what I have come up

Implementing a language interpreter in Haskell

由 时光怂恿深爱的人放手 提交于 2019-11-27 17:11:09
I want to implement an imperative language interpreter in Haskell (for educational purposes). But it's difficult for me to create right architecture for my interpreter: How should I store variables? How can I implement nested function calls? How should I implement variable scoping? How can I add debugging possibilities in my language? Should I use monads/monad transformers/other techniques? etc. Does anybody know good articles/papers/tutorials/sources on this subject? Stefan Holdermans If you are new to writing this kind of processors, I would recommend to put off using monads for a while and

How to repeat last command in python interpreter shell?

由 本秂侑毒 提交于 2019-11-27 16:57:36
How do I repeat the last command? The usual keys: Up, Ctrl+Up, Alt-p don't work. They produce nonsensical characters. (ve)[kakarukeys@localhost ve]$ python Python 2.6.6 (r266:84292, Nov 15 2010, 21:48:32) [GCC 4.4.4 20100630 (Red Hat 4.4.4-10)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> print "hello world" hello world >>> ^[[A File "<stdin>", line 1 ^ SyntaxError: invalid syntax >>> ^[[1;5A File "<stdin>", line 1 [1;5A ^ SyntaxError: invalid syntax >>> ^[p File "<stdin>", line 1 p ^ SyntaxError: invalid syntax >>> I use the following to enable history

Why python compile the source to bytecode before interpreting?

由 元气小坏坏 提交于 2019-11-27 16:13:07
问题 Why python compile the source to bytecode before interpreting? Why not interpret from the source directly? 回答1: Nearly no interpreter really interprets code directly , line by line – it's simply too inefficient. Almost all interpreters use some intermediate representation which can be executed easily. Also, small optimizations can be performed on this intermediate code. Python furthermore stores this code which has a huge advantage for the next time this code gets executed: Python doesn't

How to fix column calculation in Python readline if using color prompt

由 眉间皱痕 提交于 2019-11-27 14:38:18
I use standard tips for customizing interactive Python session: $ cat ~/.bashrc export PYTHONSTARTUP=~/.pystartup $ cat ~/.pystartup import os import sys import atexit import readline import rlcompleter historyPath = os.path.expanduser("~/.pyhistory") def save_history(historyPath=historyPath): import readline readline.write_history_file(historyPath) if os.path.exists(historyPath): readline.read_history_file(historyPath) term_with_colors = ['xterm', 'xterm-color', 'xterm-256color', 'linux', 'screen', 'screen-256color', 'screen-bce'] if os.environ.get('TERM') in term_with_colors: green='\033[32m
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