line_profiler是一款监测python的CPU密集型性能问题的强大工具,可以对函数进行逐行分析,在linux上安装时一切正常,然而今天在win10 64位系统安装失败了
pip3 install line_profiler
报错:
error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": http://landinghub.visualstudio.com/visual-cpp-build-tools
提示我需要安装 Microsoft Visual C++ 14.0
解决办法:
wheel是一个已经编译好的包,在安装时不需要编译过程,安装whl文件时要比发布的源文件安装要快,目前大部分python包都有wheel包,推荐使用wheel方式安装
从https://www.lfd.uci.edu/~gohlke/pythonlibs/网站找到line_profiler,找到对应的python版本,实测python3.6.4下win_32版本安装不成功,使用win_amd64能成功安装
简单测试:
kernprof -l -v tr1y.py
正常输出如下:
(1.800000000000033, -1.800000000000033) length of x: 1000 total elements: 1000000 Wrote profile results to tr1y.py.lprof Timer unit: 5.68888e-07 sTotal time: 2.84954 s File: tr1y.py Function: calculate_z_serial_purepython at line 48Line # Hits Time Per Hit % Time Line Contents ==============================================================48 @profile49 def calculate_z_serial_purepython(max_iter, zs, cs):50 1 7062.0 7062.0 0.1 output = [0] * len(zs)51 1000001 564275.0 0.6 11.3 for i in range(len(zs)):52 1000000 553309.0 0.6 11.0 n = 053 1000000 632514.0 0.6 12.6 z = zs[i]54 1000000 593978.0 0.6 11.9 c = cs[i]55 1485000 1365751.0 0.9 27.3 while abs(z) < 2 and n < max_iter:56 485000 344250.0 0.7 6.9 z = z * z + c57 485000 310470.0 0.6 6.2 n += 158 1000000 637342.0 0.6 12.7 output[i] = n59 1 3.0 3.0 0.0 return output