(RunningFast) ➜ stable pip install boto3 Collecting boto3 Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f30c47e8710>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/boto3/ Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f30c306b550>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/boto3/ Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f30c306b950>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/boto3/ Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f30c306b610>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/boto3/ Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f30c306b5d0>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/boto3/ Could not find a version that satisfies the requirement boto3 (from versions: ) No matching distribution found for boto3 |
Failed to establish a new connection Errno -2 Name or service not known
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f30c47e8710>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/boto3/
pip install Failed to establish a new connection Errno -2 Name or service not known
pip install Retrying Retry total
NewConnectionError · Issue #3899 · pypa/pip · GitHub
pip 6.0 unconditionally uses the network to check for update · Issue #2269 · pypa/pip · GitHub
chef – Connection to pypi.python.org timed out – Stack Overflow
pip install Retrying Retry total after connection broken by NewConnectionError
pip search更是出错：
(RunningFast) ➜ stable pip search boto Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f12e6e4e3d0>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /pypi Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f12e6e4e550>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /pypi Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f12e6e4e5d0>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /pypi Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f12e6e4e750>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /pypi Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f12e6e4e8d0>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /pypi Exception: Traceback (most recent call last): File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/basecommand.py”, line 215, in main status = self.run(options, args) File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/commands/search.py”, line 43, in run pypi_hits = self.search(query, options) File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/commands/search.py”, line 60, in search hits = pypi.search({‘name’: query, ‘summary’: query}, ‘or’) File “/usr/local/lib/python2.7/xmlrpclib.py”, line 1243, in __call__ return self.__send(self.__name, args) File “/usr/local/lib/python2.7/xmlrpclib.py”, line 1602, in __request verbose=self.__verbose File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/download.py”, line 764, in request headers=headers, stream=True) File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py”, line 518, in post return self.request(‘POST’, url, data=data, json=json, **kwargs) File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/download.py”, line 378, in request return super(PipSession, self).request(method, url, *args, **kwargs) File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py”, line 475, in request resp = self.send(prep, **send_kwargs) File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py”, line 585, in send r = adapter.send(request, **kwargs) File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/_vendor/cachecontrol/adapter.py”, line 46, in send resp = super(CacheControlAdapter, self).send(request, **kw) File “/root/Envs/RunningFast/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py”, line 467, in send raise ConnectionError(e, request=request) ConnectionError: HTTPSConnectionPool(host=’pypi.python.org’, port=443): Max retries exceeded with url: /pypi (Caused by NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f12e6e4ea10>: Failed to establish a new connection: [Errno -2] Name or service not known’,)) (RunningFast) ➜ stable |
Pip Proxy Error – Stack Overflow
(RunningFast) ➜ stable pip –version pip 8.1.2 from /root/Envs/RunningFast/lib/python2.7/site-packages (python 2.7) |
(RunningFast) ➜ stable pip install –upgrade pip Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f1308a65050>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/pip/ Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f1308a651d0>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/pip/ Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f1308a65350>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/pip/ Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f1308a654d0>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/pip/ Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f1308a65650>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/pip/ Requirement already up-to-date: pip in /root/Envs/RunningFast/lib/python2.7/site-packages |
linux – I can ping but cannot download from the internet – Super User
(RunningFast) ➜ stable echo $http_proxy (RunningFast) ➜ stable echo $https_proxy |
pip install after connection broken by NewConnectionError
算了。暂时放弃。
尝试
自己下载包，从本地安装。
结果出错：
(RunningFast) ➜ stable rz rz waiting to receive. Starting zmodem transfer. Press Ctrl+C to cancel. Transferring boto3-1.4.2.zip… 100% 291 KB 291 KB/sec 00:00:01 0 Errors (RunningFast) ➜ stable ll total 404K -rw-r–r– 1 root root 1.5K Nov 10 15:20 api_manual.md -rw-r–r– 1 root root 292K Dec 13 22:00 boto3-1.4.2.zip -rw-r–r– 1 root root 1.1K Dec 13 21:11 config.py -rw-r–r– 1 root root 575 Dec 13 21:12 config.pyc -rw-r–r– 1 root root 2.4K Oct 18 09:48 db_create.py -rw-r–r– 1 root root 383 Oct 17 21:59 db_manager.py drwxr-xr-x 2 root root 4.0K Oct 18 14:36 instance drwxr-xr-x 2 root root 4.0K Dec 12 18:15 logs drwxr-xr-x 3 root root 4.0K Oct 18 14:36 migrations -rw-r–r– 1 root root 3.3K Nov 11 15:40 README.md -rw-r–r– 1 root root 46K Sep 3 21:59 redis.conf -rw-r–r– 1 root root 605 Nov 10 15:30 requirements.txt drwxr-xr-x 6 root root 4.0K Dec 13 21:12 runningfast -rw-r–r– 1 root root 516 Nov 1 10:50 run.py -rw-r–r– 1 root root 600 Nov 1 10:56 run.pyc -rw-r–r– 1 root root 9.3K Nov 4 14:39 supervisor.conf (RunningFast) ➜ stable ls boto3-1.4.2.zip boto3-1.4.2.zip (RunningFast) ➜ stable pwd /root/RunningFast/stable (RunningFast) ➜ stable pip install boto3 –no-index –find-links file:///root/RunningFast/stable/boto3-1.4.2.zip Ignoring indexes: https://pypi.python.org/simple Collecting boto3 Collecting botocore<1.5.0,>=1.4.1 (from boto3) Could not find a version that satisfies the requirement botocore<1.5.0,>=1.4.1 (from boto3) (from versions: ) No matching distribution found for botocore<1.5.0,>=1.4.1 (from boto3) |
需要：
botocore
然后去：
unzip boto3-1.4.2.zip
cd boto3-1.4.2
python setup.py install
但是还是失败：
(RunningFast) ➜ boto3-1.4.2 python setup.py install running install running bdist_egg running egg_info creating boto3.egg-info writing requirements to boto3.egg-info/requires.txt writing boto3.egg-info/PKG-INFO writing top-level names to boto3.egg-info/top_level.txt writing dependency_links to boto3.egg-info/dependency_links.txt writing manifest file ‘boto3.egg-info/SOURCES.txt’ reading manifest file ‘boto3.egg-info/SOURCES.txt’ reading manifest template ‘MANIFEST.in’ writing manifest file ‘boto3.egg-info/SOURCES.txt’ installing library code to build/bdist.linux-x86_64/egg running install_lib running build_py creating build creating build/lib creating build/lib/boto3 copying boto3/exceptions.py -> build/lib/boto3 copying boto3/utils.py -> 。。。 byte-compiling build/bdist.linux-x86_64/egg/boto3/resources/collection.py to collection.pyc byte-compiling build/bdist.linux-x86_64/egg/boto3/compat.py to compat.pyc creating build/bdist.linux-x86_64/egg/EGG-INFO copying boto3.egg-info/PKG-INFO -> build/bdist.linux-x86_64/egg/EGG-INFO copying boto3.egg-info/SOURCES.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying boto3.egg-info/dependency_links.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying boto3.egg-info/requires.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying boto3.egg-info/top_level.txt -> build/bdist.linux-x86_64/egg/EGG-INFO zip_safe flag not set; analyzing archive contents… boto3.session: module references __file__ boto3.docs.service: module references __file__ creating dist creating ‘dist/boto3-1.4.2-py2.7.egg’ and adding ‘build/bdist.linux-x86_64/egg’ to it removing ‘build/bdist.linux-x86_64/egg’ (and everything under it) Processing boto3-1.4.2-py2.7.egg creating /root/Envs/RunningFast/lib/python2.7/site-packages/boto3-1.4.2-py2.7.egg Extracting boto3-1.4.2-py2.7.egg to /root/Envs/RunningFast/lib/python2.7/site-packages Adding boto3 1.4.2 to easy-install.pth file Installed /root/Envs/RunningFast/lib/python2.7/site-packages/boto3-1.4.2-py2.7.egg Processing dependencies for boto3==1.4.2 Searching for s3transfer<0.2.0,>=0.1.0 Reading https://pypi.python.org/simple/s3transfer/ Downloading https://pypi.python.org/packages/e6/e0/61bf352050b0d687755cd1a41ead378e6b1b48f8754076c413e816fcc1ee/s3transfer-0.1.9.tar.gz#md5=036d467e77e0d4dfa65448d63a9208bc Best match: s3transfer 0.1.9 Processing s3transfer-0.1.9.tar.gz Writing /tmp/easy_install-8AcA4k/s3transfer-0.1.9/setup.cfg Running s3transfer-0.1.9/setup.py -q bdist_egg –dist-dir /tmp/easy_install-8AcA4k/s3transfer-0.1.9/egg-dist-tmp-HphqRg zip_safe flag not set; analyzing archive contents… Moving s3transfer-0.1.9-py2.7.egg to /root/Envs/RunningFast/lib/python2.7/site-packages Adding s3transfer 0.1.9 to easy-install.pth file Installed /root/Envs/RunningFast/lib/python2.7/site-packages/s3transfer-0.1.9-py2.7.egg Searching for jmespath<1.0.0,>=0.7.1 Reading https://pypi.python.org/simple/jmespath/ Download error on https://pypi.python.org/simple/jmespath/: [Errno -2] Name or service not known — Some packages may not be found! Couldn’t find index page for ‘jmespath’ (maybe misspelled?) Scanning index of all packages (this may take a while) Reading https://pypi.python.org/simple/ Download error on https://pypi.python.org/simple/: [Errno -2] Name or service not known — Some packages may not be found! No local packages or working download links found for jmespath<1.0.0,>=0.7.1 error: Could not find suitable distribution for Requirement.parse(‘jmespath<1.0.0,>=0.7.1’) (RunningFast) ➜ boto3-1.4.2 |
换了个时间，结果又好了：
(RunningFast) ➜ staging pip search boto bchelpers (0.3.0) – Handy helpers to make botocore easier to use hazinses (0.5.2) – A simple Django app for connecting AMAZON SES-CELERY AND BOTO. tornado-botocore (1.0.2) – Use tornado’s AsyncHTTPClient inside botocore. pyboto3 (1.3) – Pythonic Interface for AWS boto3 that gives you autocomplete on every service whistletips (0.0.1) – AWS/boto3 helper library and reference tools boto_addins (0.2) – Async proxy libraries for AWS services. botocorev063p (0.63.2) – Low-level, data-driven core of boto 3. moto (0.4.30) – A library that allows your python tests to easily mock out the boto library boto3 (1.4.2) – The AWS SDK for Python INSTALLED: 1.4.2 (latest) txboto (0.1.0) – AWS implementation for Twisted, based on Boto django-simple-s3storage (0.1) – A simple django storage backend for Amazon S3 built ontop of Boto. boto3_policygen (0.2) – Generates policy documents from calls to boto3 / botocore awscatalyst (0.0.9) – boto3 wrapper to make AWS DevOps’ life easier yieldfrom.botocore (0.1.7) – asyncio port of botocore, the low-level, data-driven core of boto 3. django-boto (0.3.9) – Wrapper of boto package for django wolphin (1.0) – Wolphin is a cousin of Boto. It can manage Amazon ec2 instances for your project. django-s3-folder-storage (0.5) – Quick extension of django-storages’ S3BotoStorage to allow separate folders for uploaded and static media within an S3 bucket. s3stash (1.2.1) – Very simple module that uses boto3 to stash a file in S3 gcs-oauth2-boto-plugin (1.14) – Auth plugin allowing use the use of OAuth 2.0 credentials for Google Cloud Storage in the Boto library. botogram (0.3.4) – A Python framework for Telegram bots botocore (1.4.85) – Low-level, data-driven core of boto 3. ec2util (0.1.5) – Performs common ec2 tasks on the command line. Written in Python, based on boto. bynamodb (0.1.7) – High-Level DynamoDB Interface for Pythonwrapping Low-Level Interface of boto pyramid_boto3 (0.1) – Adapt boto3 to pyramid aiobotocore-mirror (0.0.4) – UNKNOWN bcdoc (0.16.0) – ReST document generation tools for botocore. gcs-oauth2-boto-plugin-grow (1.14) – Auth plugin allowing use the use of OAuth 2.0 credentials for Google Cloud Storage in the Boto library. django-amazon-ses (0.1.3) – A Django email backend that uses Boto3 to interact withAmazon Simple Email Service (SES). bespin (0.5.9.2) – Opinionated wrapper around boto that reads yaml boto3helper (0.1.4) – boto3 helper classes boto-mangrove (0.0.1) – An amazon aws services connexion pool on top of boto python library s3-encryption (0.1.3) – Thin wrapper around boto3 S3 client which supports client side encryption compatable with ruby aws-sdk-core botornot (0.3) – Check Twitter accounts for bot behavior moto-ext (0.4.26) – A library that allows your python tests to easily mock out the boto library aiobotocore (0.0.6) – troposphere_sugar (0.0.5) – Common utilities on top of troposphere and boto for ease of clouformation template creation boto3facade (0.4.7) – A simple facade for Boto3 krux-boto (0.0.4) – Library for interacting with boto built on krux-stdlib motoboto (0.0.0) – A plugin replacement for the s3 part of boto easyboto (0.2.1) – Amazon Cloud made easy botornado (0.0.4) – boto on tornado – an asynchronous Amazon Web Service (AWS) client Flask-BotoSQS (0.2.0) – Boto3 SQS integration for Flask zone53 (0.3.3) – A convenient Python API to manage AWS route53 (requires boto) ssan (0.0.1) – ssan is a simple boto3 S3 wrapper that provide very basic put, get, delete conventional method zc.botokeyring (0.1.0) – Integration of boto and keyring boto-patch (2.38.0) – Amazon Web Services Library XStatic-roboto-fontface (0.5.0.0) – roboto-fontface 0.5.0 (XStatic packaging standard) boto3_retry (0.1.2) – A tool for easily retring failed AWS requests via boto3 based on the error code boto-scripts (0.0.0) – Does something foo pymangrove (1.0.0) – a boto connexion pool gae_boto (13.10.1) – A recreation of Amazon Boto library that is is compatible with Google App Engine and easier to use. awsmanager (0.3.6) – Simple boto wrapper script Flask-Boto3 (0.2.2) – Flask extension that ties boto3 to the application botocore_paste (0.2) – Adapt botocore to paste awslib (0.6) – Small library providing Amazon Web Services utility functions on top of boto botox (0.1.1) – High level Boto (AWS) wrapper. Gives boto a facelift! merkle-tree (0.2) – CLI to calculate Merkle Tree based on botocore implementation. awstestutils (1.0.0) – Artifacts to test dependencies with AWS using boto3 iboto (0.20.2) – Amazon EC2 shell for managing multiple accounts and regions easily gcs-oauth2-boto-env-plugin (0.1.3) – Google Storage auth2 plugin with support for passing service key via environment placebo (0.8.1) – Make boto3 calls that look real but have no effect kotocore (0.1.2) – Utility for botocore. boto-s3-shim (0.1.1) – Inject an alternative S3 server into any boto-based project boto (2.44.0) – Amazon Web Services Library botools (0.0.1) – Utilities to automate common AWS tasks, like uploading to S3 django-djaboto (0.0.6a3) – A Django app and assorted tools to help create, deploy and manage Django projects on AWS servers botoweb (1.5.5) – Boto based webapp framework dynamo_db_dict (0.2.4) – Simple Python interface to Amazon DynamoDB, adding some dict-like sugar to boto.dynamodb.layer2. robotonotebook (0.0.1.post3) – A Mezzanine CMS theme intended for publishing a personal blog with a minimalist design typeset with the Roboto typeface. pysqes (0.2.1) – A simple queue service using Amazon SQS and boto btx (0.1) – A botocore helper class botool (0.1.1) – A botocore helper lib boto3_paste (0.1) – Adapt boto3 to paste botocore-tornado (0.93.1) – botocore subclasses that uses AsyncHTTPClient boto_rsync (0.8.1) – An rsync-like wrapper for boto’s S3 and Google Storage interfaces. boto_utils (0.3) – Command-line tools based on Boto floto (0.0.1) – Workflow orchestration using AWS Simple Workflow and boto3 s3rap (0.6) – AWS S3 convenience functions based on boto3. botor (0.0.1dev8) – A thin wrapper around boto3 botodeploy (0.0.2) – AWS Deployment Tools botoflow (0.8) – Botoflow is an asynchronous framework for Amazon SWF that helps you build SWF applications using Python You are using pip version 8.1.2, however version 9.0.1 is available. You should consider upgrading via the ‘pip install –upgrade pip’ command. |
去试试：
(RunningFast) ➜ staging pip install –upgrade pip Collecting pip Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB) 100% |████████████████████████████████| 1.3MB 169kB/s Installing collected packages: pip Found existing installation: pip 8.1.2 Uninstalling pip-8.1.2: Successfully uninstalled pip-8.1.2 Successfully installed pip-9.0.1 (RunningFast) ➜ staging pip –version pip 9.0.1 from /root/Envs/RunningFast/lib/python2.7/site-packages (python 2.7) (RunningFast) ➜ staging pip install boto3 Requirement already satisfied: boto3 in /root/Envs/RunningFast/lib/python2.7/site-packages/boto3-1.4.2-py2.7.egg Collecting botocore<1.5.0,>=1.4.1 (from boto3) Downloading botocore-1.4.85-py2.py3-none-any.whl (3.1MB) 100% |████████████████████████████████| 3.1MB 254kB/s Collecting jmespath<1.0.0,>=0.7.1 (from boto3) Downloading jmespath-0.9.0-py2.py3-none-any.whl Requirement already satisfied: s3transfer<0.2.0,>=0.1.0 in /root/Envs/RunningFast/lib/python2.7/site-packages/s3transfer-0.1.9-py2.7.egg (from boto3) Collecting docutils>=0.10 (from botocore<1.5.0,>=1.4.1->boto3) Downloading docutils-0.13.1-py2-none-any.whl (537kB) 100% |████████████████████████████████| 542kB 237kB/s Requirement already satisfied: python-dateutil<3.0.0,>=2.1 in /root/Envs/RunningFast/lib/python2.7/site-packages (from botocore<1.5.0,>=1.4.1->boto3) Collecting futures<4.0.0,>=2.2.0 (from s3transfer<0.2.0,>=0.1.0->boto3) Downloading futures-3.0.5-py2-none-any.whl Requirement already satisfied: six>=1.5 in /root/Envs/RunningFast/lib/python2.7/site-packages (from python-dateutil<3.0.0,>=2.1->botocore<1.5.0,>=1.4.1->boto3) Installing collected packages: jmespath, docutils, botocore, futures Successfully installed botocore-1.4.85 docutils-0.13.1 futures-3.0.5 jmespath-0.9.0 |
安装了boto3，以及依赖的库：
botocore-1.4.85 docutils-0.13.1 futures-3.0.5 jmespath-0.9.0
【总结】
之前用pip install boto3，出错：
Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by ‘NewConnectionError(‘<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f30c47e8710>: Failed to establish a new connection: [Errno -2] Name or service not known’,)’: /simple/boto3/
确定是：
当时，（服务器是）阿里云，连接到pip的官网的网络有问题，导致连不上
解决办法：
后来换了个时间，第二天早上，网络正常了，再去pip install boto3，就可以了。
转载请注明：在路上 » 【已解决】pip install失败：Failed to establish a new connection Errno -2 Name or service not known