https://www.bilibili.com/video/av77410524?p=29
ls = line.split () action is to this line of code elements of each row are separated by spaces, into a list coexist
The document read into a string reserved
Time into the character string in txt
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The second part of the loop
try code if an error occurs, the following code will be executed except
If there is no error, then the normal program execution, except it will not execute code section
The data and calculation of avg
Cnt to calculate the number of lines of log files
avg / cnt obtain an average temperature
Modify the code to try to obtain the light, the average value of the voltage
#sensor_reader.py
#读取日志文件代码
try:
f = open("sensor_data.txt","r")
avg, count=0, 0
voltage = 0
light = 0
for line in f:
ls = line.split()
count += 1
avg += ls[2]
voltage += ls[-1]
light += ls[-2]
print("平均温度值是：{:.2f}".format(avg/count))
print("平均光照是：{:.2f}".format(light/count))
print("平均voltage是：{:.2f}".format(voltage/count))
f.close()
except:
print("文件打开错误")
