Python 循环和子流程中的列表，标准输出

我想在for循环中调用一个子流程，并将垂直行水平放置在列表中，以便通过逗号分隔打印它们。 我的代码是这样的

import serial
import time
import subprocess                                                               #test
subprocess.call(['echo','I am Learning to use Subprocesses'])   #when Using subprocess.call([*1,*2])   *1 is the first argument and it is the bash code, *2 is the opti$
ser = serial.Serial("/dev/ttyUSB0", 4800, timeout = 1)
file = open("/home/pi/GPSWIFIMODIFIED.csv", "a")
file.write('\n')

for i in range(0,50):
       date = time.time()
       val = ser.readline();
       if val.find("GPGGA")==-1: continue
####      subprocess.call([iwlist, scan and the stuff
###       iwlout = sys.stdout(((( output on the screen)))))) the output which iwlist wlan0 scan will put on the screen
###       line = iwlout.readline()
###       for j in range (1,40):
###             if line.find("Cell +j")==-1:
####                    mylistofwifi = [line.find("Address"),line.find("Quality"),line.find("IEEE"),line.find("Pairwise")]


####    ########################### ######Here there must be iwlist scan, and the gathering must be done

       print >> file ,date,',',val[:42],',','WIFI DATA WILL BE HERE'#     print mylistofwifi will be here
file.close()

目前工作的行逐行存储数据，我想要的是将我从iwlist scan输出中选择的行添加到有时间和GPGGA数据的行的末尾

问题是，我是Python新手，不能有效地使用列表、解析或子流程

如有任何建议，我们将不胜感激，提前感谢

sudo wlan0 iwlist的输出scan:

 Cell 01 - Address: 00:26:99:4D:0F:34
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=18/100  Signal level=18/100
                    Encryption key:on
                    ESSID:"STAFF"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=0000000db0b79259
                    Extra: Last beacon: 0ms ago
                    IE: Unknown: 00055354414646
                    IE: Unknown: 010882040B0C12161824
                    IE: Unknown: 03010B
                    IE: Unknown: 0706494520010D14
                    IE: Unknown: 0B0504000E8D5B
                    IE: Unknown: 2A0100
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (2) : 802.1x Proprietary
                    IE: Unknown: 32043048606C
                    IE: Unknown: 851E06008F000F00FF03590045452D472D303100000000000000000004000027
                    IE: Unknown: 9606004096000E00
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
                    IE: Unknown: DD06004096010104
                    IE: Unknown: DD050040960305
                    IE: Unknown: DD050040960B09
                    IE: Unknown: DD050040961401
          Cell 02 - Address: 00:26:99:4D:0D:35
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=21/100  Signal level=21/100
                    Encryption key:on
                    ESSID:"eduroam"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000001021e097bd4
                    Extra: Last beacon: 0ms ago
                    IE: Unknown: 0007656475726F616D
                    IE: Unknown: 010882848B0C12961824
                    IE: Unknown: 03010B
                    IE: Unknown: 0706494520010D14
                    IE: Unknown: 0B0503000C8D5B
                    IE: Unknown: 2A0100
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (2) : 802.1x Proprietary
                    IE: Unknown: 32043048606C
                    IE: Unknown: 851E02008F000F00FF03590045452D472D303200000000000000000003000027
                    IE: Unknown: 9606004096000B00
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (2) : 802.1x Proprietary
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
                    IE: Unknown: DD06004096010104
                    IE: Unknown: DD050040960305
                    IE: Unknown: DD050040960B09
                    IE: Unknown: DD050040961401
          Cell 03 - Address: 00:26:99:4D:0D:30
                    Channel:11
                    Frequency:2.462 GHz (Channel 11)
                    Quality=21/100  Signal level=21/100
                    Encryption key:on
                    ESSID:"CONF"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000001021e0e36dd
                    Extra: Last beacon: 0ms ago
                    IE: Unknown: 0004434F4E46
                    IE: Unknown: 010882848B0C12961824
                    IE: Unknown: 03010B
                    IE: Unknown: 0706494520010D14
                    IE: Unknown: 0B0503000C8D5B
                    IE: Unknown: 2A0100
                    IE: Unknown: 32043048606C
                    IE: Unknown: 851E02008F000F00FF03590045452D472D303200000000000000000003000027
                    IE: Unknown: 9606004096000B00
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101800003A4000027A4000042435E0062322F00
                    IE: Unknown: DD06004096010104
                    IE: Unknown: DD050040960305
                    IE: Unknown: DD050040960B09
                    IE: Unknown: DD050040961400

在没有

子进程调用的情况下运行文件的输出（[iwlist和stuff

（不包括注释行）

您可以使用获取进程的输出：

from subprocess import check_output
iwout = check_output(['wlan0', 'iwlist', 'scan']).splitlines()

然后在打印时：

print >> file, date, ',', val[:42], ',', ', '.join(iwout)

您可以将

iwout

替换为

map（strip，iwout）

以删除不必要的空白

---

正如您所看到的，我删除了

sudo

，因为它可能会阻止请求密码的执行，所以您不应该在脚本中包含

sudo

调用，除非它们是交互式的，否则您应该以root权限运行所有命令，然后在不使用

sudo
的情况下执行所有调用。您想要全部吗线路？谢谢你的回答，但我需要使用sudo，否则我看不到所有的单元格，我只能看到我连接的单元格------但问题是我只需要“sudo wlan0 iwlist scan”中的特定线路输出，包含第一个小区的ESSID、质量、加密、802.11的行，第二个小区相同，第三个小区相同，直到最后一个小区，选择器代码可以添加到check_输出中，还是可以重定向？
print >> file, date, ',', val[:42], ',', ', '.join(iwout)