Python调试执行模式

Question

我使用Android NDK 9d为Android（4.4.4）交叉编译python 2.7.2。

将编译后的项加载到目标后，我遇到了可执行文件可以工作的问题，但是除了打印版本或帮助菜单外，其他所有操作都返回错误代码1。

我复制了整个东西

/system/usr/bin/python2.7 
/system/usr/lib/libpython2.7.so 
/system/usr/lib/python2.7/* 

PYTHONHOME=/system/usr/ 
PATH=/system/usr/bin:/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin 
PYTHONPATH=/system/usr/lib/python2.7/lib-dynload:/system/usr/lib/python2.7 
LD_LIBRARY_PATH=/vendor/lib:/system/lib:/system/usr/lib:/system/usr/lib:/system/usr/lib/python2.7:/system/usr/lib/python2.7/lib-dynload 

有没有办法让Python更详细的了解为什么它返回一个错误代码，并拒绝工作（如进入交互模式），这样我就可以知道如果这是某种配置问题，或者我必须自己编辑代码来弄清楚发生了什么？

shell@devicex:/ # python2.7 --version 
Python 2.7.2 
shell@devicex:/ # python2.7 --help 
usage: python2.7 [option] ... [-c cmd | -m mod | file | -] [arg] ... 
Options and arguments (and corresponding environment variables): 
-B  : don't write .py[co] files on import; also PYTHONDONTWRITEBYTECODE=x 
-c cmd : program passed in as string (terminates option list) 
-d  : debug output from parser; also PYTHONDEBUG=x 
-E  : ignore PYTHON* environment variables (such as PYTHONPATH) 
-h  : print this help message and exit (also --help) 
-i  : inspect interactively after running script; forces a prompt even 
     if stdin does not appear to be a terminal; also PYTHONINSPECT=x 
-m mod : run library module as a script (terminates option list) 
-O  : optimize generated bytecode slightly; also PYTHONOPTIMIZE=x 
-OO : remove doc-strings in addition to the -O optimizations 
-Q arg : division options: -Qold (default), -Qwarn, -Qwarnall, -Qnew 
-s  : don't add user site directory to sys.path; also PYTHONNOUSERSITE 
-S  : don't imply 'import site' on initialization 
-t  : issue warnings about inconsistent tab usage (-tt: issue errors) 
-u  : unbuffered binary stdout and stderr; also PYTHONUNBUFFERED=x 
     see man page for details on internal buffering relating to '-u' 
-v  : verbose (trace import statements); also PYTHONVERBOSE=x 
     can be supplied multiple times to increase verbosity 
-V  : print the Python version number and exit (also --version) 
-W arg : warning control; arg is action:message:category:module:lineno 
     also PYTHONWARNINGS=arg 
-x  : skip first line of source, allowing use of non-Unix forms of #!cmd 
-3  : warn about Python 3.x incompatibilities that 2to3 cannot trivially fix 
file : program read from script file 
-  : program read from stdin (default; interactive mode if a tty) 
arg ...: arguments passed to program in sys.argv[1:] 

Other environment variables: 
PYTHONSTARTUP: file executed on interactive startup (no default) 
PYTHONPATH : ':'-separated list of directories prefixed to the 
       default module search path. The result is sys.path. 
PYTHONHOME : alternate <prefix> directory (or <prefix>:<exec_prefix>). 
       The default module search path uses <prefix>/pythonX.X. 
PYTHONCASEOK : ignore case in 'import' statements (Windows). 
PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr. 
shell@devicex:/ # 
shell@devicex:/ # python2.7; echo $? 
1 
shell@devicex:/ # 

由于

Answer 1

在代码黑客一点后，我意识到，蟒要求/system/usr/include/python2.7文件夹内容是存在于装置上。复制完成后，它现在可以正常工作。

至于没有看到任何调试输出的原始问题，在仔细研究代码后，我还发现stdout和stderr被重定向到sdcard日志文件，这就是为什么我没有看到错误的输出。解决这个问题后，输出前端的一切都很好。