subprocess.Popen：'OSError：[Errno 2]没有这样的文件或目录'仅在Linux上 [英] subprocess.Popen: 'OSError: [Errno 2] No such file or directory' only on Linux

问题描述

这不是 subprocess.Popen： OSError：[Errno 13]权限被拒绝仅在Linux上，因为该问题是由于错误的权限导致的。该问题已得到解决，这是一个完全不同的问题。

This is not a duplicate of subprocess.Popen: 'OSError: [Errno 13] Permission denied' only on Linux as that problem occurred due to wrong permissions. That has been fixed and this is an entirely different problem.

当我的代码（如下所示）在Windows（我的笔记本电脑和AppVeyor CI），它可以完成预期的工作。但是在Linux（TravisCI上的VM）上，它使我抛出文件未找到错误。

When my code (given below) executes on Windows (both my laptop and AppVeyor CI), it does what it's supposed to do. But on Linux (VM on TravisCI), it throws me a file not found error.

我正在 / home / travis / build /中执行sayak-brm / espeak4py / 。

ls -l <​​/ code>输出：

ls -l outputs:

$ ls -l
total 48
-rw-rw-r-- 1 travis travis   500 Sep 29 20:14 appveyor.yml
drwxrwxr-x 3 travis travis  4096 Sep 29 20:14 espeak4py
-rw-rw-r-- 1 travis travis 32400 Sep 29 20:14 LICENSE.md
-rw-rw-r-- 1 travis travis  2298 Sep 29 20:14 README.md
-rw-rw-r-- 1 travis travis     0 Sep 29 20:14 requirements.txt
-rw-rw-r-- 1 travis travis   759 Sep 29 20:14 test.py

$ ls -l espeak4py
total 592
-rwxr-xr-x 1 travis travis 276306 Sep 30 06:42 espeak
drwxrwxr-x 5 travis travis   4096 Sep 29 20:14 espeak-data
-rw-rw-r-- 1 travis travis 319488 Sep 29 20:14 espeak.exe
-rw-rw-r-- 1 travis travis   1125 Sep 29 20:14 __init__.py

$ ls -l /home/travis/build/sayak-brm/espeak4py/espeak4py
total 592
-rwxr-xr-x 1 travis travis 276306 Sep 30 06:42 espeak
drwxrwxr-x 5 travis travis   4096 Sep 30 06:42 espeak-data
-rw-rw-r-- 1 travis travis 319488 Sep 30 06:42 espeak.exe
-rw-rw-r-- 1 travis travis   1216 Sep 30 06:42 __init__.py

表示文件应该在该位置。

which shows that the files are where they are supposed to be.

espeak 文件是Linux ELF二进制文件。

The espeak file is a Linux ELF Binary.

错误：

$ python3 test.py
Testing espeak4py
Testing wait4prev
Traceback (most recent call last):
  File "test.py", line 10, in <module>
    mySpeaker.say('Hello, World!')
  File "/home/travis/build/sayak-brm/espeak4py/espeak4py/__init__.py", line 38, in say
    self.prevproc = subprocess.Popen(cmd, executable=self.executable, cwd=os.path.dirname(os.path.abspath(__file__)))
  File "/opt/python/3.2.6/lib/python3.2/subprocess.py", line 744, in __init__
    restore_signals, start_new_session)
  File "/opt/python/3.2.6/lib/python3.2/subprocess.py", line 1394, in _execute_child
    raise child_exception_type(errno_num, err_msg)
OSError: [Errno 2] No such file or directory: '/home/travis/build/sayak-brm/espeak4py/espeak4py/espeak'

---

代码：

espeak4py / __ init __。py ：

#! python3
import subprocess
import os
import platform

class Speaker:
    """
    Speaker class for differentiating different speech properties.
    """
    def __init__(self, voice="en", wpm=120, pitch=80):
        self.prevproc = None
        self.voice = voice
        self.wpm = wpm
        self.pitch = pitch
        if platform.system() == 'Windows': self.executable = os.path.dirname(os.path.abspath(__file__)) + "/espeak.exe"
        else: self.executable = os.path.dirname(os.path.abspath(__file__)) + "/espeak"

    def generateCommand(self, phrase):
        cmd = [
            self.executable,
            "--path=.",
            "-v", self.voice,
            "-p", self.pitch,
            "-s", self.wpm,
            phrase
        ]
        cmd = [str(x) for x in cmd]
        return cmd

    def say(self, phrase, wait4prev=False):
        cmd=self.generateCommand(phrase)
        if wait4prev:
            try: self.prevproc.wait()
            except AttributeError: pass
        else:
            try: self.prevproc.terminate()
            except AttributeError: pass
        self.prevproc = subprocess.Popen(cmd, executable=self.executable, cwd=os.path.dirname(os.path.abspath(__file__)))

test.py ：

#! python3
import espeak4py
import time

print('Testing espeak4py\n')
print('Testing wait4prev')

mySpeaker = espeak4py.Speaker()

mySpeaker.say('Hello, World!')
time.sleep(1)
mySpeaker.say('Interrupted!')
time.sleep(3)

mySpeaker.say('Hello, World!')
time.sleep(1)
mySpeaker.say('Not Interrupted.', wait4prev=True)
time.sleep(5)

print('Testing pitch')

myHighPitchedSpeaker = espeak4py.Speaker(pitch=120)
myHighPitchedSpeaker.say('I am a demo of the say function')
time.sleep(5)

print('Testing wpm')

myFastSpeaker = espeak4py.Speaker(wpm=140)
myFastSpeaker.say('I am a demo of the say function')
time.sleep(5)

print('Testing voice')

mySpanishSpeaker = espeak4py.Speaker(voice='es')
mySpanishSpeaker.say('Hola. Como estas?')

print('Testing Completed.')

---

我不这样做吨下理解为什么它只能在一个平台上运行而不能在另一个平台上运行。

---

I don't understand why it works only on one platform and not the other.

Travis CI日志： https://travis-ci.org/sayak-brm/espeak4py

Travis CI Logs: https://travis-ci.org/sayak-brm/espeak4py

AppVeyor日志： https://ci.appveyor.com/project/sayak-brm/espeak4py

AppVeyor Logs: https://ci.appveyor.com/project/sayak-brm/espeak4py

GitHub： https：//sayak-brm.github .io / espeak4py

推荐答案

与回购协议打包的Linux二进制文件与Travis Build Architecture和Travis Build Architecture不兼容。

The Linux binary packaged with the repo is not compatible with the Travis Build Architecture and the binary needs t be built from source before it is executed.

构建说明：
https://github.com/rhdunn/espeak#building-1

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