[项目实践] 在项目实战中提升代码效率的的一次应用实践-----使用列表解析式输出当前android设备的CPU核数

提示：扫一扫查出行
【扫一扫了解最新限行尾号】
复制提示

1、先按照初学者思维代码应该是这样的

 #coding:utf-8

 import os

 text = os.popen("adb shell command cat /proc/cpuinfo",'r').read().split("\n")

 i = 0

 for j in text:

     if "processor\t:" in j:

         i += 1

 if i == 1:

     print ("单核")

 elif i == 2:

     print ("2核")

 elif i == 3:

     print ("3核")

 elif i == 4:

     print ("4核")

 elif i == 5:

     print ("5核")

 elif i == 6:

     print ("6核")

 elif i == 7:

     print ("7核")

 elif i == 8:

     print ("8核")

上面的代码也没啥毛病，也能得出正确的结果，但代码有20多行，实在是影响代码的执行效率了

2、接下来看这个

 #coding:utf-8

 import os

 i = 0

 cores = ["单核","2核","3核","4核","5核","6核","7核","8核"]

 text = os.popen("adb shell command cat /proc/cpuinfo",'r').read().split("\n")

 lst = [i+1 for j in text if "Processor\t:" in j]

 cpu_cores = cores[len(lst)-1]

 print (cpu_cores)

得出的结果跟上面的一样，那这样看看哪个的执行效率更好些