Subprocess.call 或 Subprocess.Popen 不能使用 PATH (Linux/Windows) 中的可执行文件 [英] Subprocess.call or Subprocess.Popen cannot use executables that are in PATH (Linux/Windows)

问题描述

我正在编写一个程序，它需要在 Linux 和 Windows 上运行并使用路径中存在的可执行文件(带参数).(假设)

I'm writing a programme that needs to run on both Linux and Windows and use executables (with parameters) that exist in the path. (Assumed)

目前我在使用 Subprocess.Call 和 Subprocess.Popen 在 Windows 中运行可执行文件时遇到问题.

Currently I'm having trouble running executables in windows using Subprocess.Call and Subprocess.Popen.

对于这样的代码，在 windows 8 中

For a code like this, in windows 8

def makeBlastDB(inFile, inputType, dbType, title, outDir):
    strProg = 'makeblastdb'
    strInput = '-in ' + inFile
    strInputType = '-input_type ' + inputType
    strDBType = '-dbtype ' + dbType
    strTitle = '-title ' + title
    strOut = '-out ' + os.path.join(os.sep, outDir, title)
    cmd = [strProg, strInput, strInputType, strDBType, strTitle, strOut]
    result = Popen(cmd, shell=True)

我在控制台收到错误消息

I get the error message in console

'makeblastdb' is not recognized as an internal or external command,
operable program or batch file.

即使我可以使用 cmd.exe 运行相同的命令我得到与 shell=False 相同的响应.

Even though I can run the same command using cmd.exe I get the same response with shell=False.

假设可执行文件在 PATH 环境变量中，关于如何运行命令的任何想法?谢谢

Any ideas on how I can run the command assuming that the executable is in PATH environment variable? Thanks

推荐答案

好的，这就是我让它工作的方式.

Ok here is how I got it to work.

env = os.environ
proc = subprocess.Popen(args, env=env)

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