Question

我一直在敲打这个问题好几个小时，并在互联网上寻找答案。我怕我干了。我的程序的这一部分将检测是否安装了Python的MySQL Connector模块，如果没有，将使用PIP来安装它。 Windows和其他版本都有代码。我试图让Windows部分工作，但对于我的生活，似乎无法做到。这是代码块（原谅任何废话，我在黑暗中被刺伤）：

try:
    import mysql.connector as MySQL
except ImportError:
    print("In order to use this program, you need a MySQL connector module,")
    print("provided by MySQL. Do you wish to install this module (uses SUDO)? (y/n)")
    ans = input()
    if ans == "y":
        import subprocess
        if os.name == 'nt': # Windows users will have a different call
            try:
                subprocess.call("pip install mysql-connector-python", shell = True)
            except:
                print("Unable to install module...exiting")
                exit(1)
                raise SystemExit
        else:
            try:
                subprocess.call("sudo pip3 install --allow-external mysql-connector-python mysql-connector-python", shell = True)
            except:
                print("Unable to install module...exiting")
                exit(1)
                raise SystemExit
        print("The MySQL Connector module was unable to be installed...exiting.")
        exit(1)
        raise SystemExit
    else:
        print("The module mysql-connector-python needs to be installed to use this program.")
        print("Module was not installed. Exiting...")
        raise SystemExit

运行程序后，这是我在控制台中输出的输出：

Please choose either the 'O' or 'D' option. Print 'H' or 'HELP' for help. Print 'Q' to quit.
-->  d
In order to use this program, you need a MySQL connector module,
provided by MySQL. Do you wish to install this module (uses SUDO)? (y/n)
y
Fatal Python error: Py_Initialize: unable to load the file system codec
  File "C:\Python27\lib\encodings\__init__.py", line 123
    raise CodecRegistryError,\
                            ^
SyntaxError: invalid syntax
The MySQL Connector module was unable to be installed...exiting.

我很确定问题不在于CodecRegistryError，但是我很难尝试使用＆＃39; subprocess＆＃39;启动pip安装。和Windows命令提示符。非常兴奋您的意见！

更新：提醒我忘记发布系统规格。我正在使用PyDev插件（3.6.0.201406232321）运行Eclipse 4.4（Luna）。我的操作系统是Windows 8.1 Professional 64位，我安装了Python 2.7和Python 3.4。我的默认Python版本目前是2.7。

Answer 1

#!/usr/bin/env python
from subprocess import check_output
print check_output("dir c:;pwd;", shell=True)

如何使用Python子进程启动Windows命令提示符？

1 个答案: