Not able to install pexpect using pip

Question

I am not able to install pexpect using pip. Here is the error:

$ sudo -H pip install pexpect
Collecting pexpect
Could not find a version that satisfies the requirement pexpect (from 
versions: )
No matching distribution found for pexpect

$ sudo -H pip install --upgrade pip
Requirement already up-to-date: pip in /Library/Python/2.7/site- 
packages
$ python --version
Python 2.7.10

Could someone please point me what could be the issue? Thanks

I tried brew and easy_install as well. None of them worked:

$ sudo -H easy_install pexpect

Searching for pexpect
Reading https://pypi.python.org/simple/pexpect/
Download error on https://pypi.python.org/simple/pexpect/: [SSL: 
TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) 
-- Some packages may not be found!
Couldn't find index page for 'pexpect' (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/: [SSL: 
TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) 
-- Some packages may not be found!
No local packages or download links found for pexpect
error: Could not find suitable distribution for 
Requirement.parse('pexpect')

$ brew install pexpect
Error: No available formula with the name "pexpect"
==> Searching for a previously deleted formula (in the last month)...
Warning: homebrew/core is shallow clone. To get complete history run:
  git -C "$(brew --repo homebrew/core)" fetch --unshallow

Error: No previously deleted formula found.
==> Searching for similarly named formulae...
==> Searching local taps...
Error: No similarly named formulae found.
==> Searching taps...
==> Searching taps on GitHub...
Error: No formulae found in taps.

I checked the site: https://pypi.python.org/simple/pexpect/ . I do not see files for python 2.7 version. That could be the reason. Does anyone know how can i get pexpect for Python 2.7 or any other solution.

Install Python from either a) Python website or b) from Homebrew. — xrisk, May 18 '18 at 17:50
Possible duplicate of [Not able to install python packages \[SSL: TLSV1\_ALERT\_PROTOCOL\_VERSION\]](https://stackoverflow.com/questions/49768770/not-able-to-install-python-packages-ssl-tlsv1-alert-protocol-version) — phd, May 18 '18 at 18:37

score 0 · Answer 1 · answered Mar 11 '19 at 19:41

0

I found an odd result on a fresh install. I was unable to install anything with pip3 until I ran python once. Ran python -V and then had no problems.

answered Mar 11 '19 at 19:41

jshep321

553
5
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This is more a comment than an answer. – Reedinationer Mar 11 '19 at 20:04
Well it is not a root cause for certain, but running python -v just once fixed my problem. So at worst I'd call it a pragmatic solution. – jshep321 Jul 12 '19 at 19:53

score 0 · Answer 2 · answered Jul 01 '22 at 08:19

Like 'Ray Mo', upgrading pip2 was the solution for me. It seems that pexpect now has a version dependency on pip.

However, pip dropped support for python2 from version 21 onwards, so you need to install version 20 e.g.

sudo python2 -m pip install --upgrade pip>=20,<21

Now pexpect will install.

score -1 · Answer 3 · edited Sep 02 '19 at 18:22

-1

pip was not installing till it was upgraded.

I first had to update pip with the following command:

sudo pip install --upgrade pip

If pip does not properly upgrade on the first attempt, rerun the command.
Once pip has upgraded successfully, installing pexpect is a piece of cake.

edited Sep 02 '19 at 18:22

Trenton McKinney

56,955
33
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answered Sep 02 '19 at 17:21

Ray Mo

34
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Not able to install pexpect using pip

3 Answers3