python--终端工具之subprocess

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一、

subprocess.getstatusoutput

import subprocess
cmd = 'ifconfig'
def cmds(cmd,print_msg=True):
status,result = subprocess.getstatusoutput(cmd)
if status > 0:
return {"status":"failed","msg":result}
return {"status":"succeed","msg":result}

可以将执行之后的状态和执行结果反馈，但是痛点：result是一次性返回，简单的说就是，比如你执行一条ping www.baidu.com的命令，程序一直是在执行状态，无任何输出，只当执行结束后返回status和result

二、

subprocess.Popen

import subprocess
cmd = 'ping www.baidu.com'
def cmds(cmd,print_msg=True):
p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
print(p.stderr)
lines = []
for line in iter(p.stdout.readline, b''):
line = line.rstrip().decode('utf8')
if print_msg:
print(">>>", line)
if __name__ == '__main__': cmds(cmd)

成功解决之前的问题，可将命令的执行结果实时更新，但是在执行结束之后并不能得知其执行状态是成功或失败

def cmds(self,cmds, print_msg=True):
compilePopen = subprocess.Popen(cmds,shell=True,stdout=subprocess.PIPE,close_fds=True,stderr=subprocess.STDOUT)
compilePopen.wait() # 没有这个无法得知compilePopen.returncode状态是否成功
for line in iter(compilePopen.stdout.readline, b''):
msg = line.rstrip().decode('utf8')if print_msg:
self.ws.send(json.dumps({
"progress": "run_script",
"msg": msg,
'ctime': time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()),
'user': self.task.username
}))
# if compilePopen.returncode >= 0: # 执行成功

# else: # 执行失败

重新调整了之后可以将实时内容和执行状态都做拿到，但是亲测感觉效率并不好，还有没有更好的办法呢？

或者

def sh(self,cmds, print_msg=True):
print('sh')
msgStr = []
env = Business_Env_Assets.objects.filter(id=self.apps.env).first().name
compilePopen = subprocess.Popen(cmds,shell=True,stdout=subprocess.PIPE,close_fds=True,stderr=subprocess.STDOUT)
returnMsg = ''
for line in iter(compilePopen.stdout.readline, b''):
line = line.rstrip().decode('utf8')
print(line)
stdout, stderr = compilePopen.communicate()
returncode = compilePopen.returncode
if returncode > 0:
result = {"status": "failed", "msg": returnMsg}
result = {"status": "succeed", "msg": returnMsg}
self.handle_result("post_deploy", result)