Python子进程调用预编译java

Question

这可以从windows命令行执行：

c:\mallet\bin\mallet run

我试过了

subprocess.call(['c:\mallet\bin\mallet', 'run'])

得到一个错误

WindowsError: [Error 2] The system cannot find the file specified

我试过了

subprocess.call(['c:/mallet/bin/mallet', 'run'])

并得到错误

WindowsError: [Error 193] %1 is not a valid Win32 application

我必须把什么传递给subprocess.call()？

为了完整起见，我想传递的完整命令是：

bin\mallet run cc.mallet.topics.tui.DMRLoader texts.txt features.txt instance.mallet

我模糊的想法是，这是一个预编译的java类，我正在以某种方式调用它，但我真的不明白我在这里做什么。

下面是文件夹bin中的两个mallet文件

mallet.bat

@echo off

rem This batch file serves as a wrapper for several
rem  MALLET command line tools.

if not "%MALLET_HOME%" == "" goto gotMalletHome

echo MALLET requires an environment variable MALLET_HOME.
goto :eof

:gotMalletHome

set MALLET_CLASSPATH=%MALLET_HOME%\class;%MALLET_HOME%\lib\mallet-deps.jar
set MALLET_MEMORY=1G
set MALLET_ENCODING=UTF-8

set CMD=%1
shift

set CLASS=
if "%CMD%"=="import-dir" set CLASS=cc.mallet.classify.tui.Text2Vectors
if "%CMD%"=="import-file" set CLASS=cc.mallet.classify.tui.Csv2Vectors
if "%CMD%"=="import-smvlight" set CLASS=cc.mallet.classify.tui.SvmLight2Vectors
if "%CMD%"=="train-classifier" set CLASS=cc.mallet.classify.tui.Vectors2Classify
if "%CMD%"=="train-topics" set CLASS=cc.mallet.topics.tui.Vectors2Topics
if "%CMD%"=="infer-topics" set CLASS=cc.mallet.topics.tui.InferTopics
if "%CMD%"=="estimate-topics" set CLASS=cc.mallet.topics.tui.EstimateTopics
if "%CMD%"=="hlda" set CLASS=cc.mallet.topics.tui.HierarchicalLDATUI
if "%CMD%"=="prune" set CLASS=cc.mallet.classify.tui.Vectors2Vectors
if "%CMD%"=="split" set CLASS=cc.mallet.classify.tui.Vectors2Vectors
if "%CMD%"=="bulk-load" set CLASS=cc.mallet.util.BulkLoader
if "%CMD%"=="run" set CLASS=%1 & shift

if not "%CLASS%" == "" goto gotClass

echo Mallet 2.0 commands: 
echo   import-dir        load the contents of a directory into mallet instances (one per file)
echo   import-file       load a single file into mallet instances (one per line)
echo   import-svmlight   load a single SVMLight format data file into mallet instances (one per line)
echo   train-classifier  train a classifier from Mallet data files
echo   train-topics      train a topic model from Mallet data files
echo   infer-topics      use a trained topic model to infer topics for new documents
echo   estimate-topics   estimate the probability of new documents given a trained model
echo   hlda              train a topic model using Hierarchical LDA
echo   prune             remove features based on frequency or information gain
echo   split             divide data into testing, training, and validation portions
echo Include --help with any option for more information


goto :eof

:gotClass

set MALLET_ARGS=

:getArg

if "%1"=="" goto run
set MALLET_ARGS=%MALLET_ARGS% %1
shift
goto getArg

:run

java -Xmx%MALLET_MEMORY% -ea -Dfile.encoding=%MALLET_ENCODING% -classpath %MALLET_CLASSPATH% %CLASS% %MALLET_ARGS%

:eof

和mallet

#!/bin/bash


malletdir=`dirname $0`
malletdir=`dirname $malletdir`

cp=$malletdir/class:$malletdir/lib/mallet-deps.jar:$CLASSPATH
#echo $cp

MEMORY=1g

JAVA_COMMAND="java -Xmx$MEMORY -ea -Djava.awt.headless=true -Dfile.encoding=UTF-8 -server -classpath $cp"

CMD=$1
shift

help()
{
cat <<EOF
Mallet 2.0 commands: 

  import-dir         load the contents of a directory into mallet instances (one per file)
  import-file        load a single file into mallet instances (one per line)
  import-svmlight    load SVMLight format data files into Mallet instances
  train-classifier   train a classifier from Mallet data files
  classify-dir       classify data from a single file with a saved classifier
  classify-file      classify the contents of a directory with a saved classifier
  classify-svmlight  classify data from a single file in SVMLight format
  train-topics       train a topic model from Mallet data files
  infer-topics       use a trained topic model to infer topics for new documents
  evaluate-topics    estimate the probability of new documents under a trained model
  hlda               train a topic model using Hierarchical LDA
  prune              remove features based on frequency or information gain
  split              divide data into testing, training, and validation portions

Include --help with any option for more information
EOF
}

CLASS=

case $CMD in
    import-dir) CLASS=cc.mallet.classify.tui.Text2Vectors;;
    import-file) CLASS=cc.mallet.classify.tui.Csv2Vectors;;
        import-svmlight) CLASS=cc.mallet.classify.tui.SvmLight2Vectors;;
    train-classifier) CLASS=cc.mallet.classify.tui.Vectors2Classify;;
        classify-dir) CLASS=cc.mallet.classify.tui.Text2Classify;;
        classify-file) CLASS=cc.mallet.classify.tui.Csv2Classify;;
        classify-svmlight) CLASS=cc.mallet.classify.tui.SvmLight2Classify;;
    train-topics) CLASS=cc.mallet.topics.tui.Vectors2Topics;;
    infer-topics) CLASS=cc.mallet.topics.tui.InferTopics;;
    evaluate-topics) CLASS=cc.mallet.topics.tui.EvaluateTopics;;
    hlda) CLASS=cc.mallet.topics.tui.HierarchicalLDATUI;;
    prune) CLASS=cc.mallet.classify.tui.Vectors2Vectors;;
    split) CLASS=cc.mallet.classify.tui.Vectors2Vectors;;
    bulk-load) CLASS=cc.mallet.util.BulkLoader;;
    run) CLASS=$1; shift;;
    *) echo "Unrecognized command: $CMD"; help; exit 1;;
esac

$JAVA_COMMAND $CLASS $*

Answer 1

当您调用一个没有扩展的程序时，Windows将尝试几个标准扩展(.BAT，.EXE，.)以猜测您要调用的文件。

如果您想在没有shell的情况下执行程序以执行该查找阶段，则需要传递要执行的批处理的全名--包括。.BAT扩展：

subprocess.call(['c:/mallet/bin/mallet.bat', 'run'])

Answer 2

确保将shell = True参数传递给subprocess.call()。但是，它会带来安全问题，因此请确保查看文档并了解其工作方式。

subprocess.call(['c:/mallet/bin/mallet', 'run'], shell = True)

此外，当使用字符串标识包含反斜杠的路径时，请将其设置为原始字符串(r"This is a raw string!")，这样它就不会实现其他任何东西(例如换行符)。

如果我以上的建议不起作用，我只能做两件事：

1. 您要执行的文件可能不是应用程序文件(.exe文件)。我不使用Windows，所以我不确定这一点，但这可能是一种可能性。
2. 文件中的东西坏了或者类似的东西。

文档

安全问题

Answer 3

也许问题是反斜杠。

从他们的文档

反斜杠()字符用于转义具有特殊意义的字符，如换行符、反斜杠本身或引号字符。

所以你应该做：

subprocess.call(['c:\\mallet\\bin\\mallet', 'run'])