如何正確使用python訪問系統命令並使我的腳本工作？

Question

所以我的腳本是當我在i3上打開少於3個工作空間時，在屏幕上輸出更大的dzen2 conky，當我打開3個以上的工作空間時將其縮小。 這是腳本dzresize.py：

import subprocess
def main():
    #gets the number of workspaces from i3
    status = subprocess.check_output(["i3-msg", "-t", "get_workspaces"])
    #puts status in a list
    status_list = list(status)
    #sets name to 0
    name = 0
    for i in status_list:
        if i == "name":
            name +=1
    #counts the amount of name in status_list
    if len(status_list) <=3:
    #if the workspaces are less than or equal to 3, expands dzen2 with conky output
            subprocess.check_output(["conky", "-d", "-c", "~/bin/conkyrc_cli|dzen2", "-fg", "#666666", "-bg", "#333333", "-ta", "left", "-w", "725", "-x", "54", "-y", "750"])
    else:
    #if the workspaces are greater than or equal to 3 run the minimal smaller size dzen2 with conky
            subprocess.check_output(["dzconky.sh"])
main()

這是腳本的輸出：

Conky: forked to background, pid is 18519

i3-msg -t get_workspaces的示例輸出（如果我有2個工作空間打開）：

i3-msg -t get_workspaces
[{"num":1,"name":"1","visible":false,"focused":false,"rect":{"x":0,"y":0,"width":1366,"height":749},"#output":"LVDS1","urgent":false},{"num":2,"name":"2","visible":true,"focused":true,"rect":{"x":0,"y":#0,"width":1366,"height":749},"output":"LVDS1","urgent":false}]

依賴於i3，dzen2和文件〜/ bin / conkyrc_cli和〜/ bin / dzconky.sh。 〜/斌/ conkyrc_cli：

# Conky configuration for Dzen2, to be piped into i3bar
##############################################
#  Settings
##############################################
background no
out_to_console yes
update_interval 1.0
total_run_times 0
use_spacer none
TEXT
^fg(\#6699cc)Processor^fg()^fg(green)${cpu cpu0}.00%^fg()^fg(white)|^fg(\#6699cc)Memory^fg()^fg(green)${memperc}.00%^fg()^fg(white)|^fg(\#6699cc)Root^fg()^fg(green)${fs_used_perc /}.00%^fg()^fg(white)|^fg(\#6699cc)Home^fg()^fg(green)${fs_used_perc /home}.00%^fg()^fg(white)|^fg(\#6699cc)Temperature^fg()^fg(green)${hwmon temp 1}'C^fg()^fg(white)|^fg(\#6699cc)Dn^fg()^fg(green)${downspeedf wlan0}KiB^fg()^fg(white)|^fg(\#6699cc)U^fg()^fg(green)${upspeedf wlan0}KiB^fg()

〜/斌/ dzconky.sh：

#!/bin/sh
exec conky -d -c "$HOME/bin/conkyrc_cli" | dzen2 -fg "#666666" -bg "#333333" -ta left -w 607 -x 188 -y 750 &
exit 0

編輯：更新為代碼以反映新的更改和新輸出

Answer 1

你忘了,在所有subprocess.call([...])

["i3-msg", "-t", "get_workspaces"]

編輯：

if len(status_list) <=3:
    subprocess.check_output(["dzconky_for_3_workspaces.sh"])
else:
    subprocess.check_output(["dzconky.sh"])

dzconky_for_3_workspaces.sh

#!/bin/sh
exec conky -d -c "$HOME/bin/conkyrc_cli" | dzen2 -fg "#666666" -bg "#333333" -ta left -w 725 -x 54 -y 750 &
exit 0

Answer 2

你可以使用python的sh包。 它是用於shell執行的非常好的pythonic包裝器。 如果你看一看的文件 ，你會發現， sh你在幾行需要大概大多數情況下。

安裝

pip install sh

來自docs：

容易：

from sh import curl, git, ifconfig, ls
ls()
git('fetch')
ifconfig(a=True)

重定向：

ls(_out="files.list")
ls("nonexistent", _err="error.txt")
# there is also _in for stdin

管道：

# sort this directory by biggest file
print(sort(du(glob("*"), "-sb"), "-rn"))