无法安装tabula-py

Question

我没有太多使用Python的经验，需要一些帮助。我正在尝试安装不同的包，但没有成功。最近，我尝试使用pip install tabula-py安装tabula-py，但总是得到相同的响应。

如何解决这个问题？

Collecting tabula-py
  WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000026AEB39CDC8>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/tabula-py/
  WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000026AEB3B0888>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/tabula-py/
  WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000026AEB3BF088>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/tabula-py/
  WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000026AEB3BF888>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/tabula-py/
  WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError(<pip._vendor.urllib3.connection.VerifiedHTTPSConnection object at 0x0000026AEB3BF6C8>, 'Connection to pypi.org timed out. (connect timeout=15)')': /simple/tabula-py/
  ERROR: Could not find a version that satisfies the requirement tabula-py (from versions: none)
ERROR: No matching distribution found for tabula-py

Answer 1

导致该错误的原因是pip无法连接到pypi.org服务器并下载必要的软件包并进行安装。

首先，尝试检查是否可以连接到pypi.org (从cmd或shell)：

ping pypi.org

如果您通过常规外壳建立连接，则python3中的internet设置可能会出现问题。您可以检查是否可以通过此脚本进行连接：

import urllib.request


with urllib.request.urlopen('http://pypi.org/') as response:
    status = response.status
    if 500 > status >= 400:
        print("Connection Error from Client: " + str(status))
    elif 600 > status >= 500:
        print("Connection Error from Server: " + str(status))
    else:
        print("Connection Successful")

如果有连接问题，可以考虑tabula-py的downloading a wheel file，并在本地安装：

pip install /path/to/tabula_py-1.4.2-py3-none-any.whl

对于No matching distribution found...：请仔细检查您的python版本。在某些计算机上，您可能会发现多个版本的python，有时由第三方软件(如Microsoft Visual Studio)安装。使用以下命令检查您的pip版本：

pip -V