Question

通过pip尝试安装pexpect时出现以下错误：

# pip install pexpect
Collecting pexpect
do_ypcall: clnt_call: RPC: Unable to receive; errno = Connection refused
/usr/lib/python2.6/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Using cached pexpect-4.0.tar.gz
Collecting ptyprocess>=0.5 (from pexpect)
  Using cached ptyprocess-0.5.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 20, in <module>
      File "/tmp/pip-build-2X4It7/ptyprocess/setup.py", line 10, in <module>
        "Only python 2.7 and later is supported by ptyprocess.")
    AssertionError: Only python 2.7 and later is supported by ptyprocess.

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-2X4It7/ptyprocess

很明显，下载的ptyprocess仅适用于python 2.7，但pip不应下载与已安装的python版本兼容的正确软件包版本吗？

我的系统信息：

pip -V: pip 7.1.2 from /usr/lib/python2.6/site-packages (python 2.6)

python -V: Python 2.6.6

OS: CentOS 6.3

BTW：yum install pexpect成功安装了pexpect包

谢谢

Answer 1

yum将安装pexpect v2.3.6。

easy_install或pip将于今天安装pexpect v4.0.1。

您可以使用pexpect版本3.3，它不依赖于ptyprocess版本。

# easy_install pexpect==3.3

或

# pip install pexpect==3.3

Answer 2

AssertionError: Only python 2.7 and later is supported by ptyprocess.

pyexpect取决于ptyprocess>=0.5（https://github.com/pexpect/pexpect/blob/master/setup.py#L66）

您需要安装ptyprocess版本，其中＆gt; = 0.5但首先使用python 2.6，然后安装pyexpect。

编辑看起来好运，0.5需要python 2.7（https://github.com/pexpect/ptyprocess/blob/master/setup.py#L9-L10）。你的系统软件包已修补它与2.6一起使用，所以你必须使用它。

“AssertionError：ptyprocess只支持python 2.7及更高版本”，在python 2.6上通过pip安装pexpect时

2 个答案: