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我正在尝试使用 Python 通过命令行与另一个程序进行交互。我遇到的主要问题是具有多个后续提示的特定调用。最初,命令行调用会询问项目名称,然后继续询问我是否要查看项目的任何子文件夹。我需要按顺序对每一个回答 y/n,不幸的是,每个答案都不是 y 或 n。此外,如果不阅读单独的提示,我就无法知道问题的答案,因此我无法一次发送一组“y”或“n”。
这是命令行调用:
si viewproject
输入命令后,命令行提示:
输入项目名称:
一个示例响应是:
输入项目名称:c:/test.pj
进入项目后,提示如下:
是否要递归到子项目 test_subprj.pj 中? [ynYN](n)
在这一点上,我需要用 y 或 n 来响应,具体取决于我是否需要该子项目。同样,对这个问题的回答取决于子项目。我需要能够阅读此提示中的子项目,以便用“y”或“n”来响应它
目前我需要手动输入项目以及每个 y 和 n 。我的目标是使用 Python 自动化这个过程。
有没有办法自动响应这些命令行提示?
现在的进展
子流程策略
project_path = "c:/test.pj"
with Popen(["si", "viewproject", "--project=" + project_path],
stdin=PIPE, stdout=PIPE, universal_newlines=True) as p:
for line in p.stdout:
if line.startswith("Do you want"):
answer = 'n'
else:
continue # skip it
print(answer, file=p.stdin) # provide answer
p.stdin.flush()
import re
import sys
from functools import partial
import winpexpect
project_path = "c:/test.pj"
p = winpexpect.winspawn('si viewproject --project=' + project_path)
p.logfile = sys.stdout
patterns = [re.compile('ynYN'), winpexpect.EOF]
for found in iter(partial(p.expect, patterns), 1): # until EOF
if found == 0:
answer = 'n'
p.sendline(answer)
Traceback (most recent call last):
File "C:\Python33\lib\site-packages\winpexpect-1.5-py3.3.egg\winpexpect.py", line 541, in read_nonblocking
handle, status, data = self.child_output.get(timeout=timeout)
File "C:\Python33\lib\queue.py", line 175, in get
raise Empty
queue.Empty
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Python33\lib\site-packages\winpexpect-1.5-py3.3.egg\pexpect.py", line 1378, in expect_loop
c = self.read_nonblocking (self.maxread, timeout)
File "C:\Python33\lib\site-packages\winpexpect-1.5-py3.3.egg\winpexpect.py", line 543, in read_nonblocking
raise TIMEOUT('Timeout exceeded in read_nonblocking().')
pexpect.TIMEOUT: Timeout exceeded in read_nonblocking().
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "K:\eclipse_3.6.0\plugins\org.python.pydev_2.6.0.2012062818\pysrc\pydev_runfiles.py", line 432, in __get_module_from_str
mod = __import__(modname)
File "C:\workspace\Test_prj\Test_prj.py", line 19, in <module>
for found in iter(partial(p.expect, patterns), 1): # until EOF
File "C:\Python33\lib\site-packages\winpexpect-1.5-py3.3.egg\pexpect.py", line 1311, in expect
return self.expect_list(compiled_pattern_list, timeout, searchwindowsize)
File "C:\Python33\lib\site-packages\winpexpect-1.5-py3.3.egg\pexpect.py", line 1325, in expect_list
return self.expect_loop(searcher_re(pattern_list), timeout, searchwindowsize)
File "C:\Python33\lib\site-packages\winpexpect-1.5-py3.3.egg\pexpect.py", line 1409, in expect_loop
raise TIMEOUT (str(e) + '\n' + str(self))
pexpect.TIMEOUT: Timeout exceeded in read_nonblocking().
<winpexpect.winspawn object at 0x0144AE50>
version: 2.3 ($Revision: 399 $)
command: si
args: ['si', 'viewproject', '--project=c:/test.pj']
searcher: searcher_re:
0: re.compile("ynYN")
1: EOF
buffer (last 100 chars):
before (last 100 chars):
after: <class 'pexpect.TIMEOUT'>
match: None
match_index: None
exitstatus: None
flag_eof: False
pid: 6448
child_fd: 4
closed: False
timeout: 30
delimiter: <class 'pexpect.EOF'>
logfile: <_io.TextIOWrapper name='<stdout>' mode='w' encoding='Cp1252'>
logfile_read: None
logfile_send: None
maxread: 2000
ignorecase: False
searchwindowsize: None
delaybeforesend: 0.05
delayafterclose: 0.1
delayafterterminate: 0.1
ERROR: Module: Test_prj could not be imported (file: C:\workspace\Test_prj\Test_prj.py).
distribute_setup.py <http://python-distribute.org/distribute_setup.py>
_
Downloading http://pypi.python.org/packages/source/d/distribute/distribute-0.6.36.tar.gz
Traceback (most recent call last):
File "C:\Python33\lib\urllib\request.py", line 1252, in do_open
h.request(req.get_method(), req.selector, req.data, headers) File "C:\Python33\lib\http\client.py", line 1049, in request
self._send_request(method, url, body, headers)
File "C:\Python33\lib\http\client.py", line 1087, in _send_request
self.endheaders(body)
File "C:\Python33\lib\http\client.py", line 1045, in endheaders
self._send_output(message_body)
File "C:\Python33\lib\http\client.py", line 890, in _send_output
self.send(msg)
File "C:\Python33\lib\http\client.py", line 828, in send
self.connect()
File "C:\Python33\lib\http\client.py", line 806, in connect
self.timeout, self.source_address)
File "C:\Python33\lib\socket.py", line 406, in create_connection
for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno 11001] getaddrinfo failed
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\workspace\PythonTest\distribute_setup.py", line 553, in <module>
sys.exit(main())
File "C:\workspace\PythonTest\distribute_setup.py", line 549, in main
tarball = download_setuptools(download_base=options.download_base)
File "C:\workspace\PythonTest\distribute_setup.py", line 204, in download_setuptools
src = urlopen(url)
File "C:\Python33\lib\urllib\request.py", line 160, in urlopen
return opener.open(url, data, timeout)
File "C:\Python33\lib\urllib\request.py", line 473, in open
response = self._open(req, data)
File "C:\Python33\lib\urllib\request.py", line 491, in _open
'_open', req)
File "C:\Python33\lib\urllib\request.py", line 451, in _call_chain
result = func(*args)
File "C:\Python33\lib\urllib\request.py", line 1272, in http_open
return self.do_open(http.client.HTTPConnection, req)
File "C:\Python33\lib\urllib\request.py", line 1255, in do_open
raise URLError(err)
urllib.error.URLError: <urlopen error [Errno 11001] getaddrinfo failed>
running test
running build_py
running egg_info
creating c:\documents and settings\slz1fh\desktop\winpexpect\geertj-winpexpect-76df3cfcb143\build\lib\winpexpect.egg-info
writing c:\documents and settings\slz1fh\desktop\winpexpect\geertj-winpexpect-76df3cfcb143\build\lib\winpexpect.egg-info\PKG-INFO
writing dependency_links to c:\documents and settings\slz1fh\desktop\winpexpect\geertj-winpexpect-76df3cfcb143\build\lib\winpexpect.egg-info\dependency_links.txt
writing top-level names to c:\documents and settings\slz1fh\desktop\winpexpect\geertj-winpexpect-76df3cfcb143\build\lib\winpexpect.egg-info\top_level.txt
writing requirements to c:\documents and settings\slz1fh\desktop\winpexpect\geertj-winpexpect-76df3cfcb143\build\lib\winpexpect.egg-info\requires.txt
writing manifest file 'c:\documents and settings\slz1fh\desktop\winpexpect\geertj-winpexpect-76df3cfcb143\build\lib\winpexpect.egg-info\SOURCES.txt'
reading manifest file 'c:\documents and settings\slz1fh\desktop\winpexpect\geertj-winpexpect-76df3cfcb143\build\lib\winpexpect.egg-info\SOURCES.txt'
writing manifest file 'c:\documents and settings\slz1fh\desktop\winpexpect\geertj-winpexpect-76df3cfcb143\build\lib\winpexpect.egg-info\SOURCES.txt'
running build_ext
Traceback (most recent call last):
File "C:\Documents and Settings\SLZ1FH\Desktop\winpexpect\geertj-winpexpect-76df3cfcb143\setup.py", line 35, in <module>
use_2to3 = True
File "C:\Python33\lib\distutils\core.py", line 148, in setup
dist.run_commands()
File "C:\Python33\lib\distutils\dist.py", line 917, in run_commands
self.run_command(cmd)
File "C:\Python33\lib\distutils\dist.py", line 936, in run_command
cmd_obj.run()
File "C:\Python33\lib\site-packages\distribute-0.6.36-py3.3.egg\setuptools\command\test.py", line 138, in run
self.with_project_on_sys_path(self.run_tests)
File "C:\Python33\lib\site-packages\distribute-0.6.36-py3.3.egg\setuptools\command\test.py", line 118, in with_project_on_sys_path
func()
File "C:\Python33\lib\site-packages\distribute-0.6.36-py3.3.egg\setuptools\command\test.py", line 164, in run_tests
testLoader = cks
File "C:\Python33\lib\unittest\main.py", line 124, in __init__
self.parseArgs(argv)
File "C:\Python33\lib\unittest\main.py", line 168, in parseArgs
self.createTests()
File "C:\Python33\lib\unittest\main.py", line 175, in createTests
self.module)
File "C:\Python33\lib\unittest\loader.py", line 137, in loadTestsFromNames
suites = [self.loadTestsFromName(name, module) for name in names]
File "C:\Python33\lib\unittest\loader.py", line 137, in <listcomp>
suites = [self.loadTestsFromName(name, module) for name in names]
File "C:\Python33\lib\unittest\loader.py", line 96, in loadTestsFromName
module = __import__('.'.join(parts_copy))
File "C:\Python33\lib\site-packages\nose-1.3.0-py3.3.egg\nose\__init__.py", line 1, in <module>
from nose.core import collector, main, run, run_exit, runmodule
File "C:\Python33\lib\site-packages\nose-1.3.0-py3.3.egg\nose\core.py", line 143
print "%s version %s" % (os.path.basename(sys.argv[0]), __version__)
^
SyntaxError: invalid syntax
最佳答案
在您提到的评论中 xx viewproject < answers.txt > output.txt
有效,但您不能使用它,因为答案取决于子流程的输出。
一般情况 pexpect
类似模块,例如 winpexpect
(对于 Windows)可以使用。就像是:
import re
import sys
from functools import partial
from winpexpect import EOF, winspawn as spawn
p = spawn('xx viewproject')
p.logfile = sys.stdout
patterns = ['the project:', re.escape('? [ynYN](n)'), EOF]
for found in iter(partial(p.expect, patterns), 2): # until EOF
if found == 0:
p.sendline(project_name)
elif found == 1:
filename = get_filename_from_prompt(p.before) # a regex could be used
answer = yes_or_no_from_subproject.get(filename, 'no') # a dict
p.sendline(answer)
subprocess
逐行阅读直接模块:
from subprocess import Popen, PIPE
with Popen(["xx", "viewproject"], stdin=PIPE, stdout=PIPE,
universal_newlines=True) as p:
for line in p.stdout:
if line.startswith("Please enter the name of the project"):
answer = project_name
elif line.startswith("Would you like to recurse into the subproject"):
filename = get_filename_from_prompt(line) # a regex could be used
answer = yes_or_no_from_subproject.get(filename, 'n') # a dict
else:
continue # skip it
print(answer, file=p.stdin) # provide answer
p.stdin.flush()
xx
中读取某些内容使用
subprocess
:
from subprocess import Popen, PIPE, STDOUT
with Popen(["xx", "viewproject"], bufsize=0,
stdin=PIPE, stdout=PIPE, stderr=STDOUT) as p:
print(repr(p.stdout.read(1)))
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