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我帮儿子用App Inventor 2给遥控车装了"蓝牙大脑"，手机一划车就...
...手朋友的建议：先跑通demo再改自己的项目！蓝牙SPP Demo 下载后直接打开就能用，把通信机制跑通了，再往自己的App里移植会少走很多弯路。
How to run multiple Python versions on Windows
I had two versions of Python installed on my machine (versions 2.6 and 2.5). I want to run 2.6 for one project and 2.5 for another.
...
How do I get the user agent with Flask?
...calls to getting this information out of the application context.
https://pythonhosted.org/Flask-Track-Usage/
Usage gets stored in this format:
[
{
'url': str,
'user_agent': {
'browser': str,
'language': str,
'platform': ...
How to redirect the output of the time command to a file in Linux?
Just a little question about timing programs on Linux: the time command allows to
measure the execution time of a program:
...
Number of processors/cores in command line
... am running the following command to get the number of processors/cores in Linux:
10 Answers
...
Why does Windows64 use a different calling convention from all other OSes on x86-64?
...t is concerned, the "higher" regs are ordered, and both Microsoft and UN*X/Linux went for R8 / R9 as the first ones.
Keeping that in mind, Microsoft's choice of RAX (return value) and RCX, RDX, R8, R9 (arg[0..3]) are an understandable selection if you choose four registers for arguments.
I don't kno...
static linking only some libraries
..."int main() {}" > test.cpp
# c++ test.cpp /usr/lib/libX11.a
# ldd a.out
linux-vdso.so.1 => (0x00007fff385cc000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f9a5b233000)
libm.so.6 => /lib/libm.so.6 (0x00007f9a5afb0000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00007f9a5ad99000)
lib...
fatal error: Python.h: No such file or directory
...e you haven't properly installed the header files and static libraries for python dev. Use your package manager to install them system-wide.
For apt (Ubuntu, Debian...):
sudo apt-get install python-dev # for python2.x installs
sudo apt-get install python3-dev # for python3.x installs
For y...
Running Python on Windows for Node.js dependencies
... variable.
The error clearly says this:
gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
And in your comment, you say you did this:
set PYTHONPATH=%PYTHONPATH%;C:\My_python_lib
That's nice, but that doesn't set the PYTHON variable, it sets the ...
Convert dmesg timestamp to custom date format
... What command accepts -T ? My dmesg doesn't, neither manpage tells it. (Linux Mint Debian Edition).
– gyorgyabraham
Jun 4 '13 at 8:34
1
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