為什么subprocess.py拋出WindowsError？

Question

我正在嘗試使用testing.postgresql包來測試一些腳本，並且在實例化testing.postgresql.Postgresql（）或testing.postgresql.PostgresqlFactory（）時遇到此錯誤：

File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\testing\common\database.py", line 83, in __init__
  self.initialize()
File "C:\Python27\lib\site-packages\testing\postgresql.py", line 50, in initialize
  self.initdb = find_program('initdb', ['bin'])
File "C:\Python27\lib\site-packages\testing\postgresql.py", line 134, in find_program
  path = get_path_of(name)
File "C:\Python27\lib\site-packages\testing\common\database.py", line 288, in get_path_of
  stderr=subprocess.PIPE).communicate()[0]
File "C:\Python27\lib\subprocess.py", line 710, in __init__
  errread, errwrite)
File "C:\Python27\lib\subprocess.py", line 960, in _execute_child
  startupinfo)
WindowsError: [Error 2] The system cannot find the file specified

通過跟蹤和在線搜索可以發現，subprocess.py無法找到initdb.exe。 確切的原因是subprocess.py移交給擴展模塊_subprocess.c變得更加晦澀。

我已經嘗試將包含initdb的目錄添加到系統PATH中，沒有骰子。

有沒有其他人遇到過這個問題，或者對這里發生的事情有任何見解？

Answer 1

查看源代碼，似乎與Windows不兼容。 該軟件包需要UNIX風格的環境。

testing.postgresql / src / testing / postgresql.py

def find_program(name, subdirs):
     path = get_path_of(name)
     if path:
        return path

    for base_dir in SEARCH_PATHS:
        for subdir in subdirs:
            path = os.path.join(base_dir, subdir, name)
            if os.path.exists(path):
                return path

     raise RuntimeError("command not found: %s" % name)

testing.common.database

def get_path_of(name):
     path = subprocess.Popen(['/usr/bin/which', name],
                        stdout=subprocess.PIPE,
                        stderr=subprocess.PIPE).communicate()[0]
     if path:
         return path.rstrip().decode('utf-8')
     else:
         return None

進行了編輯，以根據下面的@eryksun的評論顯示問題的正確來源。