scons

Is there a built-in function in Python that would replace (or remove, whatever) the extension of a filename (if it has one) ? Example: print replace_extension('/home/user/somefile.txt', '.jpg') In my example: /home/user/somefile.txt would become /home/user/somefile.jpg I don't know if it matters, but I need this for a SCons module I'm writing. (So perhaps there is some SCons specific function I can use ?) I'd like something clean . Doing a simple string replacement of all occurrences of .txt within the string is obviously not clean. (This would fail if my filename is somefile.txt.txt.txt )

Following the advice on the Scons FAQ and from an old mailing list thread , I've built up a really simple SConstruct and SConscript that I thought would build an example app, but errors out with: scons: Reading SConscript files ... scons: done reading SConscript files. scons: Building targets ... nios2-linux-gnu-g++ -o src/bin/example/example.o -c src/bin/example/example.cpp sh: nios2-linux-gnu-g++: command not found scons: *** [src/bin/example/example.o] Error 127 scons: building terminated because of errors. Ugh. My SConstruct file: import os env_options = { "CC" : "nios2-linux-gnu-gcc",

scons 学习 作者：Sam(甄峰) sam_code@hotmail.com http://www.scons.org/ Sam有个好朋友是做游戏的，整天嘲笑做嵌入式的用的工具多土多原始。gdb不是图形化，DDD又没VC调试好用，只会写Makefile等等。 刚好最近有需要使用scons。所以Sam准备学习之以回击这种挑衅。呵呵。 scons简介： scons是一个Python写的自动化构建工具，从构建这个角度说，它跟GNU make是同一类的工具。 scons与其它工具最显著的差别就是：scons配置文件是Python script. 它的思想是跟GNU make完全不同的。GNU make的核心是“依赖关系”，我要做的事情，就是告诉系统，一个目标依赖什么东西，并且，当被依赖的东西发生变化时，我要做什么。 例如： all: main.c $(CC) $(CFLAGS) $(LFLAGS) main.c -o BT_remote -lbluetooth -lBluetooth_remote -lm -lpthread 意思是：all依赖于main.c。 如果main.c有了变化，作下面这些事。 这样做可以解决相当多的问题，但是也带来了一个最大的问题：我如何判别这个目标依赖什么？ 对于一个两个，甚至十几个文件，我当然还比较容易搞清楚，谁依赖谁。但是当文件有成百上千个时

I am writing something like an interactive tutorial for C++. The tutorial will consist of two parts: one is compiled into a library (I'm using Scons to build that), and the other (the lessons) is shipped with the tutorial to be compiled by the end user. I'm currently looking for a good, easy way for people to build these lessons. Basically, the second part is a directory with all the lessons in it, each in its own directory. Each lesson will have at least a lesson.cpp and a main.cpp file, there may be also other files, the existence of which I will not know until after it is shipped -- the end