Only depend on requests[security] and ordereddict for Python 2.6

[davehunt]

We're looking into vendoring pipenv to help with managing environments in the Firefox build systems, and to assist with upgrading from Python 2.7 to Python 3.5+

According to the dependencies, requests[security] and ordereddict are required for Python versions below 3.0:

pipenv/setup.py

Lines 31 to 32 in 9ecaf85

	'requests[security];python_version<"3.0"',
	'ordereddict;python_version<"3.0"',

This means we also need to vendor these packages and their dependencies, which is causing us some additional challenges. When looking to see if I could exclude these dependencies, I found that they were recently only necessary for Python 2.6:

pipenv/setup.py

Lines 32 to 34 in 861429e

	if sys.version_info < (2, 7):
	required.append('requests[security]')
	required.append('ordereddict')

This was changed in 56d52b0#diff-2eeaed663bd0d25b7e608891384b7298 without any suggestion for why the version requirement should be raised. This leads me to suspect this was an error, and I have been able to successfully vendor and use pipenv with the clause changed to <"2.7".

I'll submit a pull request with this change.

$ python -m pipenv.help output

Pipenv version: '11.10.1.dev5'

Pipenv location: '/Users/dhunt/workspace/pipenv/pipenv'

Python location: '/Users/dhunt/.pyenv/versions/3.6.4/bin/python'

Other Python installations in PATH:

• 2.7: /Users/dhunt/.pyenv/shims/python2.7

• 2.7: /Users/dhunt/.pyenv/shims/python2.7

• 2.7: /usr/local/bin/python2.7

• 2.7: /usr/bin/python2.7

• 3.4: /Users/dhunt/.pyenv/shims/python3.4m

• 3.4: /Users/dhunt/.pyenv/shims/python3.4

• 3.5: /Users/dhunt/.pyenv/shims/python3.5m

• 3.5: /Users/dhunt/.pyenv/shims/python3.5

• 3.6: /Users/dhunt/.pyenv/versions/3.6.4/bin/python3.6m

• 3.6: /Users/dhunt/.pyenv/versions/3.6.4/bin/python3.6

• 3.6: /Users/dhunt/.pyenv/shims/python3.6

• 3.6: /usr/local/bin/python3.6

• 3.6.4: /Users/dhunt/.pyenv/versions/3.6.4/bin/python

• 3.6.4: /Users/dhunt/.pyenv/shims/python

• 2.7.14: /usr/local/bin/python

• 2.7.10: /usr/bin/python

• 2.7.13: /Users/dhunt/.pyenv/shims/python2

• 2.7.14: /usr/local/bin/python2

• 3.6.4: /Users/dhunt/.pyenv/versions/3.6.4/bin/python3

• 3.6.4: /Users/dhunt/.pyenv/shims/python3

• 3.6.5: /usr/local/bin/python3

PEP 508 Information:

{'implementation_name': 'cpython',
 'implementation_version': '3.6.4',
 'os_name': 'posix',
 'platform_machine': 'x86_64',
 'platform_python_implementation': 'CPython',
 'platform_release': '17.5.0',
 'platform_system': 'Darwin',
 'platform_version': 'Darwin Kernel Version 17.5.0: Mon Mar  5 22:24:32 PST '
                     '2018; root:xnu-4570.51.1~1/RELEASE_X86_64',
 'python_full_version': '3.6.4',
 'python_version': '3.6',
 'sys_platform': 'darwin'}

System environment variables:

• SPACESHIP_VERSION
• TERM_PROGRAM
• PYENV_ROOT
• NVM_CD_FLAGS
• TERM
• SHELL
• TMPDIR
• Apple_PubSub_Socket_Render
• TERM_PROGRAM_VERSION
• TERM_SESSION_ID
• PYENV_VERSION
• NVM_DIR
• USER
• SSH_AUTH_SOCK
• PYENV_DIR
• __CF_USER_TEXT_ENCODING
• PYENV_VIRTUALENV_INIT
• PAGER
• LSCOLORS
• PATH
• PWD
• LANG
• ITERM_PROFILE
• PYENV_HOOK_PATH
• XPC_FLAGS
• SPACESHIP_ROOT
• XPC_SERVICE_NAME
• PYENV_SHELL
• SHLVL
• HOME
• COLORFGBG
• ITERM_SESSION_ID
• LESS
• LOGNAME
• LC_CTYPE
• NVM_BIN
• COLORTERM
• PYTHONDONTWRITEBYTECODE
• PIP_PYTHON_PATH

Pipenv–specific environment variables:

Debug–specific environment variables:

• PATH: /Users/dhunt/.pyenv/versions/3.6.4/bin:/usr/local/Cellar/pyenv/1.2.3/libexec:/Users/dhunt/.nvm/versions/node/v6.11.1/bin:/Users/dhunt/.local/bin:/Users/dhunt/.cargo/bin:/usr/local/Cellar/pyenv-virtualenv/1.1.1/shims:/Users/dhunt/.pyenv/shims:/Users/dhunt/.cargo/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/MacGPG2/bin::/Users/dhunt/workspace/arcanist/bin/
• SHELL: /usr/local/bin/zsh
• LANG: en_GB.UTF-8
• PWD: /Users/dhunt/workspace/pipenv

---

Contents of Pipfile ('/Users/dhunt/workspace/pipenv/Pipfile'):

[dev-packages]
pipenv = {path = ".", editable = true}
"flake8" = ">=3.3.0,<4"
pytest = "*"
mock = "*"
sphinx = "<=1.5.5"
twine = "*"
sphinx-click = "*"
pytest-xdist = "*"
click = "*"
pytest-pypy = {path = "./tests/pytest-pypi", editable = true}
pytest-tap = "*"
flaky = "*"
stdeb = {version="*", markers="sys_platform == 'linux'"}
white = {version="*", markers="python_version >= '3.6'"}
pytz = "*"

[packages]

[scripts]
tests = "bash ./run-tests.sh"

[pipenv]
allow_prereleases = true

Contents of Pipfile.lock ('/Users/dhunt/workspace/pipenv/Pipfile.lock'):

{
    "_meta": {
        "hash": {
            "sha256": "bc81bb0e64d7ed1eed2627819b4a806d8cba554c1e0398191ba1ba32a216ed2a"
        },
        "pipfile-spec": 6,
        "requires": {},
        "sources": [
            {
                "name": "pypi",
                "url": "https://pypi.python.org/simple",
                "verify_ssl": true
            }
        ]
    },
    "default": {},
    "develop": {
        "alabaster": {
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            ],
            "version": "==0.7.10"
        },
        "apipkg": {
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                "sha256:65d2aa68b28e7d31233bb2ba8eb31cda40e4671f8ac2d6b241e358c9652a74b9"
            ],
            "version": "==1.4"
        },
        "asn1crypto": {
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                "sha256:9d5c20441baf0cb60a4ac34cc447c6c189024b6b4c6cd7877034f4965c464e49"
            ],
            "version": "==0.24.0"
        },
        "attrs": {
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                "sha256:a17a9573a6f475c99b551c0e0a812707ddda1ec9653bed04c13841404ed6f450"
            ],
            "version": "==17.4.0"
        },
        "babel": {
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            ],
            "version": "==2.5.3"
        },
        "certifi": {
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            ],
            "markers": "platform_python_implementation != 'pypy'",
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        },
        "chardet": {
            "hashes": [
                "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae",
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            ],
            "index": "pypi",
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        "colorama": {
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            ],
            "markers": "sys_platform == 'win32'",
            "version": "==0.3.9"
        },
        "configparser": {
            "hashes": [
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            "markers": "python_version < '3.2'",
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        "cryptography": {
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            ],
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        },
        "execnet": {
            "hashes": [
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            ],
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        },
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            ],
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        },
        "flaky": {
            "hashes": [
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        "itsdangerous": {
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            ],
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        "pytest-pypy": {
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            "path": "./tests/pytest-pypi"
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                "sha256:f6a531936c6fa4c6cfce1b9c10d5c4f498d16528d2a54a22ca00011205a187b5"
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        "six": {
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                "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb"
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        "snowballstemmer": {
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                "sha256:9f3bcd3c401c3e862ec0ebe6d2c069ebc012ce142cce209c098ccb5b09136e89"
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                "sha256:4064ea6c56feeb268838cb8fbbee507d0c3d5d92fa63a7df935a916b52c9e2f5"
            ],
            "index": "pypi",
            "version": "==1.5.5"
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        "sphinx-click": {
            "hashes": [
                "sha256:0eef2d55ee4b5ebc448d8aa52e6084b5085fd2e7852d7571abb090411217c4df",
                "sha256:c2680d84e8608bf47141e16924f1a981c653caff0faefe47a1d41c1438fbd5b4"
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        "virtualenv": {
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        "virtualenv-clone": {
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                "sha256:b5cfe535d14dc68dfc1d1bb4ac1209ea28235b91156e2bba8e250d291c3fb4f8"
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        "white": {
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                "sha256:bca98066256cfff6fb85ec36b95cc5913c888c170a8407c340786972b06c6f8f"
            ],
            "index": "pypi",
            "markers": "python_version >= '3.6'",
            "version": "==0.1.2"
        }
    }
}

---

Expected result

requests[security] and ordereddict are not required on Python 2.7.

Actual result

These dependencies are required.

Steps to replicate

Install pipenv under Python 2.7.