TLSV1_ALERT_PROTOCOL_VERSION for files.pythonhosted.org on Mac OS python 2.7

[stromnet]

Might not be relevant, but https://status.python.org/incidents/btjtz01lzp88 mentions to report issues which may have relation to https://pypi.org/simple/ansible/, and at least I seem to use that..
Never had this issue before at least (re-installing ansible 2.3.2.0 after doing some tests with 2.4.0, as evident a lot of cached stuff has been fetched earlier).

$ pip --version
pip 9.0.1 from /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages (python 2.7)
$ python
Python 2.7.11 (v2.7.11:6d1b6a68f775, Dec  5 2015, 12:54:16) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.

$ pip install --user ansible==2.3.2.0 -v
Collecting ansible==2.3.2.0
  1 location(s) to search for versions of ansible:
  * https://pypi.python.org/simple/ansible/
  Getting page https://pypi.python.org/simple/ansible/
  Looking up "https://pypi.python.org/simple/ansible/" in the cache
  No cache entry available
  Starting new HTTPS connection (1): pypi.python.org
  "GET /simple/ansible/ HTTP/1.1" 302 98
  Status code 302 not in [200, 203, 300, 301]
  Looking up "https://pypi.org/simple/ansible/" in the cache
  Current age based on date: 126
  Freshness lifetime from max-age: 600
  Freshness lifetime from request max-age: 600
  The response is "fresh", returning cached response
  600 > 126
  Analyzing links from page https://pypi.org/simple/ansible/
    Found link https://files.pythonhosted.org/packages/b6/bd/f463a82c46596e73ebd8bd98f080d7bdd2d69af0a121b5fbf74d9bd41ad9/ansible-1.0.tar.gz#sha256=f5e6ee589ae78e81bf10bd1fb743d0a091ae3f6f338fd87a9a4070f8c2878601 (from https://pypi.org/simple/ansible/), version: 1.0
    Found link https://files.pythonhosted.org/packages/0d/2e/0310daffa68b57a904b0c0b13cddab2a2b3d4a0c09d390f14f7de45a0444/ansible-1.1.tar.gz#sha256=5e7d2a46715484abcd2f59f846fb12699d64b420400cca4224ae6ec358f2d0a1 (from https://pypi.org/simple/ansible/), version: 1.1
    Found link https://files.pythonhosted.org/packages/e9/b0/ac34d0cf1182005b9cb36f76dbe0536294bed617a01b243cade9f58d5a3e/ansible-1.2.tar.gz#sha256=1fb5c697b814c8b4fc4a0dd29cdb09fab190a248e8bedb5ddbf2a1283cabb911 (from https://pypi.org/simple/ansible/), version: 1.2
    Found link https://files.pythonhosted.org/packages/5e/a9/48293bf83cf48e76c0e8d1d8241285c968c11adc340ab756802ab7c433c0/ansible-1.2.1.tar.gz#sha256=8a3f33253887f14d55cbe3cfb1c7c034a283c04f22f85da642d94e9139f18aa4 (from https://pypi.org/simple/ansible/), version: 1.2.1
    Found link https://files.pythonhosted.org/packages/12/a3/7b340e274cd3e6538b55e59ee15a5b82e445ee388553cda216206dd6df7c/ansible-1.2.2.tar.gz#sha256=a6b734ae986f99f6291b4e0a92b3729298dd39a6640243070d2ef586aaae8b23 (from https://pypi.org/simple/ansible/), version: 1.2.2
    Found link https://files.pythonhosted.org/packages/84/12/f05b1f28e8f13f53cc525a5e51651e0f5f9152f1687302e4483792bd5bef/ansible-1.2.3.tar.gz#sha256=0f12d180978e73dbb85bb224f73e8dd4e0e8b7d5bbca01719a93427405208c63 (from https://pypi.org/simple/ansible/), version: 1.2.3
    Found link https://files.pythonhosted.org/packages/a2/ff/73c8d8460f21f4d0c5ad32e2a19e46fbaa25f9759f96696449ae73fe0477/ansible-1.3.0.tar.gz#sha256=876d9eb8a8ae6e4ff943eb956c46e83d53e56ac6fb7890f83a23c3cc10508864 (from https://pypi.org/simple/ansible/), version: 1.3.0
    Found link https://files.pythonhosted.org/packages/dc/d2/7cfc153b10a4d94a7031e17e5e5c8d19237cb66ca0e40ae7d229e15ac2f5/ansible-1.3.1.tar.gz#sha256=19b001e45c934fe4c7fb055ef8d97afadf060c877b49bad7181c3edc1e3acb7b (from https://pypi.org/simple/ansible/), version: 1.3.1
    Found link https://files.pythonhosted.org/packages/92/74/9ee517af77aa5445f638f8c39a469e36928a2c27333ec7440a53591a99cc/ansible-1.3.2.tar.gz#sha256=c245061d41986a2756b144933bbd55348ab3ee912b9b30539dcaca4f7e77a0fb (from https://pypi.org/simple/ansible/), version: 1.3.2
    Found link https://files.pythonhosted.org/packages/fb/ce/3af0d73bde2c4cdd5879a0d58967e0e09c9c4a76633ba53d7939148dcfa5/ansible-1.3.3.tar.gz#sha256=c38994c18c8cecfcb2b0d9a23f943b66707baca50dd80030592234b7e91403fc (from https://pypi.org/simple/ansible/), version: 1.3.3
    Found link https://files.pythonhosted.org/packages/df/b2/c9c817c0ce4b975f5199db93de3960864c48b375565523b0e542cdf12e64/ansible-1.3.4.tar.gz#sha256=703ab03147f034dbc203c71f05f1a4fdb933942f68ff1af3dd301a6497581968 (from https://pypi.org/simple/ansible/), version: 1.3.4
    Found link https://files.pythonhosted.org/packages/d6/68/91b6c9cc0856a289f76dd96b6b71a54be18f01411d3241233a62648e49f1/ansible-1.4.tar.gz#sha256=7d38d8a1db20e539f146edda97f212e86fe2906384da92a219fe9678009608d5 (from https://pypi.org/simple/ansible/), version: 1.4
    Found link https://files.pythonhosted.org/packages/ab/33/58a99082f36966d6e86affdc0fc939c96438cb0368e87611d1e6a75e1e8e/ansible-1.4.1.tar.gz#sha256=bfd1bbf96b4802a4302262e10374c6c400a3394d4dfd6ef6a8f3f7cad77b7ac9 (from https://pypi.org/simple/ansible/), version: 1.4.1
    Found link https://files.pythonhosted.org/packages/0b/2d/0e4d97d250c2f90028f96e448094e901235d39d3802898146b3d74608f9b/ansible-1.4.2.tar.gz#sha256=5722ff53a4cfc7f7344988f9fb4904d896edb8c34dbff7e7a8e430d30ed0e139 (from https://pypi.org/simple/ansible/), version: 1.4.2
    Found link https://files.pythonhosted.org/packages/06/5a/ce17cddb6fc0859a5be42fd387eba379626ae550fcd80e7d74c586284d54/ansible-1.4.3.tar.gz#sha256=899e52f206fc28a77d959cecab36ce883d1a11524f3fa189e261cd86d74d5bb6 (from https://pypi.org/simple/ansible/), version: 1.4.3
    Found link https://files.pythonhosted.org/packages/0b/7a/cc98ad3e7b1f211a2a8a212af1402c11dbd773915370101c922b12e66f8d/ansible-1.4.4.tar.gz#sha256=d320a8a848ee499f57d2852c50bbb9d9414bd1099f4105b620382096754d2e02 (from https://pypi.org/simple/ansible/), version: 1.4.4
    Found link https://files.pythonhosted.org/packages/1c/8a/46733115b6469b0ac5d557af88284904335ac3c0306e1298a877d4906151/ansible-1.4.5.tar.gz#sha256=c88b526c6e0724c26276d96ba3beafaf2f15372703cbe86fc7884ce2df1f493f (from https://pypi.org/simple/ansible/), version: 1.4.5
    Found link https://files.pythonhosted.org/packages/38/63/7bf323520a0348f0a1dfb477be7dbe77a0d2bc7fde124bcd6c75c316f1d6/ansible-1.5.tar.gz#sha256=37c46b84a5525ad027e3828cd862089a20783944603c504630d0c9c84e62df45 (from https://pypi.org/simple/ansible/), version: 1.5
    Found link https://files.pythonhosted.org/packages/17/ae/007b7a9d943eefec09330f7eed1f0cd0bd111669335667780268d13f39d7/ansible-1.5.1.tar.gz#sha256=c0b48e9dd3770868961215b7243d1ba7be21c59606d6b8ac732673f2668ef102 (from https://pypi.org/simple/ansible/), version: 1.5.1
    Found link https://files.pythonhosted.org/packages/05/b3/5db6530d56f62ff3874174697ee0fa54e95db5d0b545bd6c9dc575a9d8cb/ansible-1.5.2.tar.gz#sha256=36cf7e378137074466a07f8568c98940031e3a0b66d3844fac788907e919875a (from https://pypi.org/simple/ansible/), version: 1.5.2
    Found link https://files.pythonhosted.org/packages/8a/5f/523ddc547a84ee68d4c00e3e118442072612afcaae4289195cdf6936f4e0/ansible-1.5.3.tar.gz#sha256=25bfecb468616ae7117fce1036de663e9fc8d2a96d71cbfabe6153ca3c781a4e (from https://pypi.org/simple/ansible/), version: 1.5.3
    Found link https://files.pythonhosted.org/packages/39/b3/aba24a99152e3b27d5217c328c00e9d4d725a69b116da462f75b497348d6/ansible-1.5.4.tar.gz#sha256=39bcc5c9888828dde04ab3f0f4984a01c3eafbf6813d623dd39fc3e8b4f3e6c8 (from https://pypi.org/simple/ansible/), version: 1.5.4
    Found link https://files.pythonhosted.org/packages/2a/de/ac1ab42ba5f940a1e9cf9eb992c5a8d935101345f47799b3478dfc612444/ansible-1.5.5.tar.gz#sha256=e6414599d44ab805ffd76273db4970d1f09b50ea5837bc8dfcdeae7254d9d45f (from https://pypi.org/simple/ansible/), version: 1.5.5
    Found link https://files.pythonhosted.org/packages/b9/b5/170c1892ca52a3df6dd69da45c8f79f8d0ae812b41a6854389510039a08e/ansible-1.6.tar.gz#sha256=7f8f34e6e8a1a1348901b2e823ee74bea73c5d3b4c251d62826bf1bd6b130736 (from https://pypi.org/simple/ansible/), version: 1.6
    Found link https://files.pythonhosted.org/packages/3e/21/f8d469c0220b41f761f779f9c791fd7b49eb2c97f58c18dad0eda64dfb14/ansible-1.6.1.tar.gz#sha256=1773e4f40339a16ea6f308e008aee0c13738b3bfbd10a82689fc42bbd3eb315c (from https://pypi.org/simple/ansible/), version: 1.6.1
    Found link https://files.pythonhosted.org/packages/42/47/7e4162a49d6788679cf24fd0ca69bb44a00bf3d9d6584be8345ab67166a2/ansible-1.6.2.tar.gz#sha256=237769ca05b75a6df7ca8239357903efb54fa679d38bab0032573298a8feadc8 (from https://pypi.org/simple/ansible/), version: 1.6.2
    Found link https://files.pythonhosted.org/packages/63/72/206d4ad00c5bf6ee060a157aab609feb5ead5f1fae02fd599619762b8736/ansible-1.6.3.tar.gz#sha256=1280d93174dd1b39f72c7302a36c5e728c9e52dd3995dd815ca1a57974256d44 (from https://pypi.org/simple/ansible/), version: 1.6.3
    Found link https://files.pythonhosted.org/packages/3d/82/d2ee9c9ead96bcb44dc7e2ca9487e0369ae28f6ac00d02288782d26881e8/ansible-1.6.4.tar.gz#sha256=8822c920be476f09b18265d4e04aca4bee1ee66fdb22e462a32cf98ffb0e87c0 (from https://pypi.org/simple/ansible/), version: 1.6.4
    Found link https://files.pythonhosted.org/packages/19/ad/897a954dfc632ca710e8b541653ee47b50a219a75dcdc736a16b62660096/ansible-1.6.5.tar.gz#sha256=d19ed70298e778beab14a92a7d7739be5e7c670d3fc2ff3be9879c9a08520397 (from https://pypi.org/simple/ansible/), version: 1.6.5
    Found link https://files.pythonhosted.org/packages/e2/09/7c4f5d377ae64013735980fc1d9995cee3b58f0831c20214919fba03c3b4/ansible-1.6.6.tar.gz#sha256=bb9f5145ff051f38b0d533b86e3f661af180346945232d000aaab401f6c3f4fe (from https://pypi.org/simple/ansible/), version: 1.6.6
    Found link https://files.pythonhosted.org/packages/5a/06/40c2fed622050ddd672a53f61e760489629ffaeba3ef053c99bd352c3a47/ansible-1.6.7.tar.gz#sha256=87458f479061abcbb0d81f2e57955ed2e21a81fd8727733f5831890cfb946420 (from https://pypi.org/simple/ansible/), version: 1.6.7
    Found link https://files.pythonhosted.org/packages/73/25/08508b1d7d0834960a1b87f0e42fb2ba52d8f120eff0e8a98ceb19d95586/ansible-1.6.8.tar.gz#sha256=1a47ea5cf339572c46bc346dea6c27e4fe828be052f8b7c0f7cc1496dcd9d616 (from https://pypi.org/simple/ansible/), version: 1.6.8
    Found link https://files.pythonhosted.org/packages/49/e7/f4b2e3a6bbf90e346ca0b73271fc3b2dac973816a870e854f1495c69098e/ansible-1.6.9.tar.gz#sha256=1fe54105b593009390a7c601ccd8aafd693cdc5a8c6c478059a485d9a0eff409 (from https://pypi.org/simple/ansible/), version: 1.6.9
    Found link https://files.pythonhosted.org/packages/00/bf/f2990442bec58eb893322ea82ff8303581add25ffc429d212ae35166a41a/ansible-1.6.10.tar.gz#sha256=3d03c42073c4b6944f23dc06e150912f4f106d65fa00290c03f8972fd70e3c71 (from https://pypi.org/simple/ansible/), version: 1.6.10
    Found link https://files.pythonhosted.org/packages/2f/d4/3a76a12463aebc006bce192e5e3de3a48d2a419bccb946849b10b3e27373/ansible-1.7.tar.gz#sha256=3dc7174d8fe3f6c3cb13b988e620a52d4d8cae3b7922a46f59005a728821679e (from https://pypi.org/simple/ansible/), version: 1.7
    Found link https://files.pythonhosted.org/packages/00/33/4645cd3a251bd87740cd256cb541257ee6072b4c5e1b9dadb9413a8e0a5b/ansible-1.7.1.tar.gz#sha256=d8fa163ab3730a03d50bc0766809cb36122b6c8be880b3bcde7e25a5b5143f6a (from https://pypi.org/simple/ansible/), version: 1.7.1
    Found link https://files.pythonhosted.org/packages/5c/ed/39e054fc5add40bb94d24db0762f3483da3b190fcfe5b234ea6f0e244bdd/ansible-1.7.2.tar.gz#sha256=a17ce716b47f831ea9c88bdab33753fa3870c7ea8a1ee5e8c1287ca40c8498ac (from https://pypi.org/simple/ansible/), version: 1.7.2
    Found link https://files.pythonhosted.org/packages/f8/0b/84bdf18819878b8cd9c60633856dd0b5e57ca74c95b9c26554e2842db8a3/ansible-1.8.tar.gz#sha256=d5e4e414834e119083ee01d6a40668d9a69b044b861d78c3fdfb6beb97660b09 (from https://pypi.org/simple/ansible/), version: 1.8
    Found link https://files.pythonhosted.org/packages/9f/bd/2d950883179d708e5b5b6a26f0b47a01b19de220a3a0d9d91f93facbb667/ansible-1.8.1.tar.gz#sha256=cb69f0bd64f01260592c80d978e030051844a2abbf51c8f1e2cff262ed041eee (from https://pypi.org/simple/ansible/), version: 1.8.1
    Found link https://files.pythonhosted.org/packages/47/42/2ea090d439beb5c1d550e692f2e69d588fea2e27781b3de6042b316479cb/ansible-1.8.2.tar.gz#sha256=2cd01ff4d67acb410bae0a9438956f6fc36d01babd956b0dc3b700620f2372b9 (from https://pypi.org/simple/ansible/), version: 1.8.2
    Found link https://files.pythonhosted.org/packages/60/aa/682a7055d3987664c7d843e4eb4348a9e084be9810f2797ac9ddc6f15f9f/ansible-1.8.3.tar.gz#sha256=c2ff9638d58cd891730988e449603c09c8fadd0259a41b27545b061ff3d9e0cd (from https://pypi.org/simple/ansible/), version: 1.8.3
    Found link https://files.pythonhosted.org/packages/5b/6d/47b1969b7ae1560b24cdf093bc6bcfc93e9361abbb5078329ae3ed75f442/ansible-1.8.4.tar.gz#sha256=d37c04b3abce9b036a6c8311fccb360c5cbc3ec895445f805243b0448d239ec1 (from https://pypi.org/simple/ansible/), version: 1.8.4
    Found link https://files.pythonhosted.org/packages/c5/7f/d1fd416770775ffb216a1269bbe6daedc66dd6b3a786075711829f8ee26d/ansible-1.9.0.1.tar.gz#sha256=b2193fd9a4061ab624fa67311796419a759de06b4f321d37169b22ba3831331c (from https://pypi.org/simple/ansible/), version: 1.9.0.1
    Found link https://files.pythonhosted.org/packages/cd/e3/c2b52043b44aede4381b9eeb185554448afdfdf2608924a4b094bf6c1a03/ansible-1.9.1.tar.gz#sha256=a6f975d565723765a4d490ff40cede96833a745f38908def4950a0075f1973f5 (from https://pypi.org/simple/ansible/), version: 1.9.1
    Found link https://files.pythonhosted.org/packages/a7/1f/246f5766b51e354347f12422ab5ed04530c04d50dfe0bf14fc63a56c4c96/ansible-1.9.2.tar.gz#sha256=c25ef4738b08fdfb3094247c012f3fd1b29972acbd37f988070b2a85f5fbee00 (from https://pypi.org/simple/ansible/), version: 1.9.2
    Found link https://files.pythonhosted.org/packages/55/29/dbd3fee20def918fa401faf1666e5a139415d8b4d967086d96ea10e0af0d/ansible-1.9.3.tar.gz#sha256=2594f642fd800056a427c1026410dc6ed8dfa7c0033f5c3d187abdb2b0d4eeed (from https://pypi.org/simple/ansible/), version: 1.9.3
    Found link https://files.pythonhosted.org/packages/5b/d6/4f84e1e6e42f758ede5ba7dd3ae043c3942c9986aae618907b4269482e18/ansible-1.9.4.tar.gz#sha256=972c2face49f1577bd0ff7989440bfe2820e66fb10d7579915cc536bccfa6fe3 (from https://pypi.org/simple/ansible/), version: 1.9.4
    Found link https://files.pythonhosted.org/packages/ae/2e/3c962b3483faa35e8d5173442e7ac58eedf3633f5457f52076f4125aa5a5/ansible-1.9.5.tar.gz#sha256=6ba3539d98d993089bea0eb4ee83a04608aff900086040f11a77f2124dccbd8e (from https://pypi.org/simple/ansible/), version: 1.9.5
    Found link https://files.pythonhosted.org/packages/c3/b5/7329497d4b28d84011e47c9605a686c5f26b68719345e9174fc19084bfbe/ansible-1.9.6.tar.gz#sha256=50773781b1e76f2885bbeb2351a97cf1c6a29239d3e073da939a104e7e81ee5d (from https://pypi.org/simple/ansible/), version: 1.9.6
    Found link https://files.pythonhosted.org/packages/64/3c/b31bfc2d1ecc96922924a1deb269e42d0de886f94240daf6ceef9874c7a6/ansible-2.0.0.0.tar.gz#sha256=63a9386ae96bd6ae3e87b9e9fecef3f3f919f333ed8db22292e37df7643cb3f6 (from https://pypi.org/simple/ansible/), version: 2.0.0.0
    Found link https://files.pythonhosted.org/packages/57/b1/8027eea673afba6495806286ee25f4c6cb8c2450e43e3e46b861132caf03/ansible-2.0.0.1.tar.gz#sha256=1085c1fae3b59f8e55a64b949489f1ddcd811a0c32d9df8ac18abf44a430f3b5 (from https://pypi.org/simple/ansible/), version: 2.0.0.1
    Found link https://files.pythonhosted.org/packages/42/eb/0f78ac9b8abbc797ce08955bc9ea1b5013937e6270c4e517d369097fb658/ansible-2.0.0.2.tar.gz#sha256=27db0b99113fab85b1430c361c7790a0aa7f5c614c9af13362e2adbba07e5828 (from https://pypi.org/simple/ansible/), version: 2.0.0.2
    Found link https://files.pythonhosted.org/packages/e8/a5/db83bcaf2c823b8fb2df01f49a3835b62f5b757e27ecb31bcb472a789e9a/ansible-2.0.1.0.tar.gz#sha256=cddc4fa6af4c1be6cd1d6634de1bd0397abad921c76b32cab6722c042744ee5d (from https://pypi.org/simple/ansible/), version: 2.0.1.0
    Found link https://files.pythonhosted.org/packages/b3/0e/5f3ee8884866a3d5e3b8ba86e9caa85ecdec75adabac8924b1c122339e7f/ansible-2.0.2.0.tar.gz#sha256=373a2e50319d90da50948e3faf1c033464b7302200e0199da8981d24646d4387 (from https://pypi.org/simple/ansible/), version: 2.0.2.0
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  Using version 2.3.2.0 (newest of versions: 2.3.2.0)
  Looking up "https://files.pythonhosted.org/packages/21/dc/ad51ca12ec4f7516d0befbc14312930a484a066b22192dac9c3814e349c4/ansible-2.3.2.0.tar.gz" in the cache
  No cache entry available
  Starting new HTTPS connection (1): files.pythonhosted.org
Cleaning up...
Exception:
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/commands/install.py", line 324, in run
    requirement_set.prepare_files(finder)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/req/req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/req/req_set.py", line 620, in _prepare_file
    session=self.session, hashes=hashes)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/download.py", line 821, in unpack_url
    hashes=hashes
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/download.py", line 659, in unpack_http_url
    hashes)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/download.py", line 853, in _download_http_url
    stream=True,
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 488, in get
    return self.request('GET', url, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/download.py", line 386, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 475, in request
    resp = self.send(prep, **send_kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 596, in send
    r = adapter.send(request, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/_vendor/cachecontrol/adapter.py", line 47, in send
    resp = super(CacheControlAdapter, self).send(request, **kw)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py", line 497, in send
    raise SSLError(e, request=request)
SSLError: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590)

[ewdurbin]

@stromnet thanks for your report. Our CDN provider is deprecating support for TLS protocols 1.0 and 1.1 on June 30, 2018. In preparation for that, the new CDN endpoint for pypi.org only has support for TLSv1.2.

What is interesting here is that the initial requests to pypi.org succeeded... It's not clear to me why subsequent requests to files.pythonhosted.org are failing. cc @dstufft

[pauldmccarthy]

I am experiencing the same problem on Python 2.7, 3.4, and 3.5. Working on Python 3.6. Can I ask how long this testing period is going to last for?

[ewdurbin]

We're just over an hour in, so we'll probably back it off now. Thanks for confirming the report @pauldmccarthy

[ewdurbin]

Determination on cause of issue:

Although pypi.org and files.pythonhosted.org share a fastly service, files.pythonhosted.org is terminated by a separate TLS endpoint which does not have TLSv1.0/TLSv1.1 enabled due to being on the shared certificate provided by our CDN.

[alex]

There is a new version of pip out which should resolve this issue for macOS users.

[stromnet]

It's working again now, so cannot verify with updated pip, but indeed it looks like 9.0.2 has related changes: https://pip.pypa.io/en/stable/news/

[brainwane]

I'm writing a note to post to https://mail.python.org/mailman/listinfo/pythonmac-sig about this, to spur users of pre-10.12 macOS versions to upgrade to pip 9.0.3. Is this accurate?

---

Mac users:

If you are running macOS/OS X version 10.12 or older, you need to upgrade to the latest pip (9.0.3) to connect to the Python Package Index securely:

curl https://bootstrap.pypa.io/get-pip.py | python

Pip 9.0.3 supports TLSv1.2 when running under system Python on macOS < 10.13. Official release notes: https://pip.pypa.io/en/stable/news/

Context:

As PSF blogged last year https://pyfound.blogspot.com/2017/01/time-to-upgrade-your-python-tls-v12.html , on June 30, 2018, Python.org sites are going to entirely stop supporting TLS versions 1.0 and 1.1, because our CDN provider is deprecating support for those versions.

We are launching the new PyPI (in beta at https://pypi.org) this month and replacing the legacy PyPI (https://pypi.python.org). Here's the beta announcement for the new PyPI: https://pyfound.blogspot.com/2018/03/warehouse-all-new-pypi-is-now-in-beta.html

Warehouse, the codebase for the new PyPI, does not support TLS 1.0 or 1.1.

We're warning our users early with this message. Also, as of late March, the Python Package Index has started doing brownouts of the deprecated TLS versions. For some portion of each hour, anyone attempting to access PyPI with TLSv1.0 or TLSv1.1 will get a 403 response with an informative error. As we get closer to the deadline, we will be ramping up the amount of time the endpoint is down for the deprecated TLS versions. The ultimate goal is to have it be 100% unavailable on and after April 8th, prior to the final deadline (because we can give a good error message -- once June 30th hits, it will just be an uninformative OpenSSL error).

More info:

• TLSV1_ALERT_PROTOCOL_VERSION for files.pythonhosted.org on Mac OS python 2.7 #3293
• Finalize TLS1.0/1.1 removal on PyPI #3411
• https://status.python.org/incidents/btjtz01lzp88

Thank you. Please publicize this.

[di]

@brainwane

Warehouse does not support TLS 1.0 or 1.1.

Might be worthwhile to mention that this is due to our CDN provider deprecating support for 1.0 & 1.1.

[pfmoore]

@brainwane Looks good to me. @dstufft knows the details better than I do, but I think this covers the key points

[brainwane]

Got an ok from Donald, touched up the prose a bit, and posted to distutils-sig and a few other places.

[gvanrossum]

I have a question of clarification. What should users of MacOS 10.13 or newer do? Is pip 9.0.1 safe there, do they all have pip 9.0.3, or should they lose all hope?

[alex]

@gvanrossum System Python on macOS 10.13 should be unaffected, since Apple upgraded the OpenSSL it links against.

I think it's theoretically possible on macOS 10.13 to have virtualenvs with Pythons created under 10.12; in those cases you should either destroy and recreate the virtualenv, or upgrade pip to 9.0.3

[gvanrossum]

Also I guess if one installed any Python version from python.org one would be affected on 10.13 right? Or do I misunderstand how this works?

I noticed ensurepip in 2.7.14 still has the pip 9.0.1 bundle (though the git repo was updated). Does this require a 2.7.15 release then? (And 3.{5,6} release too?)