要将所有标准输出作为字符串获取:
from subprocess import check_output as qxcmd = r'C:ToolsDvb_pid_3_0.exe'output = qx(cmd)
要将stdout和stderr都作为单个字符串获取:
from subprocess import STDOUToutput = qx(cmd, stderr=STDOUT)
要将所有行作为列表:
lines = output.splitlines()
要获得子进程正在打印的行,请执行以下 *** 作:
from subprocess import Popen, PIPEp = Popen(cmd, stdout=PIPE, bufsize=1)for line in iter(p.stdout.readline, ''): print line,p.stdout.close()if p.wait() != 0: raise RuntimeError("%r failed, exit status: %d" % (cmd, p.returnpre))
添加
stderr=STDOUT到
Popen()合并stdout / stderr的调用中。
注意:如果
cmd在非交互模式下使用块缓冲,则直到缓冲区刷新后才会出现行。
winpexpect模块可能能够更快地获取输出。
要将输出保存到文件:
import subprocesswith open('output.txt', 'wb') as f: subprocess.check_call(cmd, stdout=f)# to read line by linewith open('output.txt') as f: for line in f: print line,
如果
cmd总是要求输入,即使是空的;设置
stdin:
import oswith open(os.devnull, 'rb') as DEVNULL: output = qx(cmd, stdin=DEVNULL) # use subprocess.DEVNULL on Python 3.3+
您可以结合使用以下解决方案,例如,合并stdout / stderr并将输出保存到文件中,并提供空输入:
import osfrom subprocess import STDOUT, check_call as xwith open(os.devnull, 'rb') as DEVNULL, open('output.txt', 'wb') as f: x(cmd, stdin=DEVNULL, stdout=f, stderr=STDOUT)
要将所有输入作为单个字符串提供,您可以使用
.communicate()方法:
#!/usr/bin/env pythonfrom subprocess import Popen, PIPEcmd = ["python", "test.py"]p = Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE, universal_newlines=True)stdout_text, stderr_text = p.communicate(input="1nn")print("stdout: %rnstderr: %r" % (stdout_text, stderr_text))if p.returnpre != 0: raise RuntimeError("%r failed, status pre %d" % (cmd, p.returnpre))
在哪里
test.py:
print raw_input('abc')[::-1]raw_input('press enter to exit')
如果您与程序的交互更像是对话,而不需要
winpexpect模块。这是docs的示例
pexpect:
# This connects to the openbsd ftp site and# downloads the recursive directory listing.from winpexpect import winspawn as spawnchild = spawn ('ftp ftp.openbsd.org')child.expect ('Name .*: ')child.sendline ('anonymous')child.expect ('Password:')child.sendline ('[email protected]')child.expect ('ftp> ')child.sendline ('cd pub')child.expect('ftp> ')child.sendline ('get ls-lR.gz')child.expect('ftp> ')child.sendline ('bye')
要发送特殊密钥,例如
F3,
F10在Windows上,您可能需要
SendKeys模块或其纯Python实现
SendKeys-ctypes。就像是:
from SendKeys import SendKeysSendKeys(r""" {LWIN} {PAUSE .25} r C:ToolsDvb_pid_3_0.exe{ENTER} {PAUSE 1} 1{ENTER} {PAUSE 1} 2{ENTER} {PAUSE 1} {F3} {PAUSE 1} {F10}""")
它不捕获输出。
欢迎分享,转载请注明来源:内存溢出
评论列表(0条)