在python中将变量写入txt会引发一些错误
守则:在python中将变量写入txt会引发一些错误,python,linux,python-3.x,global-variables,Python,Linux,Python 3.x,Global Variables,守则: import os from time import * import socket import time global diskspace ##################### #display temp #uses shell script to find out temp then uses python to display it #python uses os module to run line of shell script os.system("cat /
import os
from time import *
import socket
import time
global diskspace
#####################
#display temp
#uses shell script to find out temp then uses python to display it
#python uses os module to run line of shell script
os.system("cat /sys/class/thermal/thermal_zone0/temp > sysTemp")
temp = open("sysTemp") # Open a file
str = temp.read(); # read characters in sysTemp
temp.close() # close opened file
t=eval(str) # convert string into number
t2=t*2 # multiply by 2, evaluated number
t3=(t/1000.00) # convert five figure temp (milli-degrees) to degrees to two decimal places
print ("temp is:")
temperature = int(t3)
print(temperature)
def temp():
if temperature > 60:
print("The temp is over 60. Cool down")
elif temperature < 40:
print("temp is below 40")
check()
#find name
##################
#check for internet connection
###################
#Display disk space
###################
def getDiskSpace():
p = os.popen("df -h /")
i = 0
while 1:
i = i +1
line = p.readline()
if i==2:
diskspace = (line.split()[4:5])
ds = diskspace[0]
print("The disk space used is:")
print(ds)
global ds
#Display CPU usage
###################
def getCPUuse():
print(os.popen("top -n1 | awk '/Cpu\(s\):/ {print $2}'").readline().strip())
#Display IP
###################
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.connect(("gmail.com",80))
IP = (s.getsockname()[0])
s.close()
print("The Ip is:" + IP)
getDiskSpace()
###################
#writing it to a .txt file
f = open("data.txt","w") #opens file with name of "test.txt"
f.write("raspberry pi data.\n")
f.write("ip:\n")
f.write(IP + "\n")
#f.write("Disk usage:" + str(ds))
f.write("temp: {0}".format(t3))
f.write("disk usage: {0}".format(ds))
f.close()
temp()
getCPUuse()
print("...")
time.sleep(10)
它说它没有定义,我尝试过很多方法,比如在def为空之前创建它,但是在文本文件中没有为diskspace写入任何内容。其他东西会写入文本文件,但不会写入此文件
输出:
温度为:
58
Ip为:192.168.1.36
回溯(最近一次呼叫最后一次):
文件“temp.py”,第74行,在
f、 写入(“磁盘使用:”+diskspace)
NameError:未定义全局名称“diskspace”
如果删除关于写入位的位,{'40%']通常会为磁盘空间打印
我添加了一些已更改的代码,这些代码打印数据,不会抛出错误,但不会写入数据。在实际使用getDiskSpace()方法之前,您正在尝试编写这些代码 在执行此操作之前,请尝试运行getDiskSpace()
f.write("Disk usage:" + diskspace + "\n")
您需要在getDiskSpace的函数定义中使用全局定义。您不能在主程序中全局定义它,也不能在函数中进行扩展。如果
i!=2
,会发生什么情况?diskspace
何时定义?diskspace不会被打印,并且通常会抛出错误。它不会被忽略也不会写入文本文件。它仍然不会写入文本文件
f.write("Disk usage:" + diskspace + "\n")