[專案實踐] 在專案實戰中提升程式碼效率的的一次應用實踐-----使用列表解析式輸出當前android裝置的CPU核數
阿新 • • 發佈:2018-11-07
1、先按照初學者思維程式碼應該是這樣的
1 #coding:utf-8 2 import os 3 text = os.popen("adb shell command cat /proc/cpuinfo",'r').read().split("\n") 4 i = 0 5 for j in text: 6 if "processor\t:" in j: 7 i += 1 8 if i == 1: 9 print ("單核") 10 elif i == 2: 11 print ("2核") 12 elif i == 3: 13 print("3核") 14 elif i == 4: 15 print ("4核") 16 elif i == 5: 17 print ("5核") 18 elif i == 6: 19 print ("6核") 20 elif i == 7: 21 print ("7核") 22 elif i == 8: 23 print ("8核")
上面的程式碼也沒啥毛病,也能得出正確的結果,但程式碼有20多行,實在是影響程式碼的執行效率了
2、接下來看這個
1 #coding:utf-8 2 import os 3 i = 0 4 cores = ["單核","2核","3核","4核","5核","6核","7核","8核"] 5 text = os.popen("adb shell command cat /proc/cpuinfo",'r').read().split("\n") 6 lst = [i+1 for j in text if "Processor\t:" in j] 7 cpu_cores = cores[len(lst)-1] 8 print (cpu_cores)
得出的結果跟上面的一樣,那這樣看看哪個的執行效率更好些