NameError: global name 'InvalidMarker' is not defined

Issue description

pipenv install results in NameError: global name 'InvalidMarker' is not defined traceback.

I’ve seen several other closed issues related to Invalid Marker, but I was unable to discover any cause from them.

Expected result

Should have created new virtualenv and installed glyphsLib 2.4.0 and its dependencies

Actual result

C:\SRC\GitHub\pysilfont>pipenv.exe --rm
Removing virtualenv (C:\Users\bobh\.virtualenvs\pysilfont-Lv_ggtc6)...

C:\SRC\GitHub\pysilfont>pipenv.exe install --verbose
Creating a virtualenv for this project...
Pipfile: C:\SRC\GitHub\pysilfont\Pipfile
Using C:\Python27\python.exe (2.7.13) to create virtualenv...
Running virtualenv with interpreter C:\Python27\python.exe
New python executable in C:\Users\bobh\.virtualenvs\pysilfont-Lv_ggtc6\Scripts\python.exe
Installing setuptools, pip, wheel...done.
Setting project for pysilfont-Lv_ggtc6 to C:\SRC\GitHub\pysilfont

Virtualenv location: C:\Users\bobh\.virtualenvs\pysilfont-Lv_ggtc6
Pipfile.lock not found, creating...
Locking [dev-packages] dependencies...
Traceback (most recent call last):
  File "c:\python27\lib\runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "c:\python27\lib\runpy.py", line 72, in _run_code
    exec code in run_globals
  File "C:\Python27\Scripts\pipenv.exe\__main__.py", line 9, in <module>
  File "c:\python27\lib\site-packages\pipenv\vendor\click\core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "c:\python27\lib\site-packages\pipenv\vendor\click\core.py", line 697, in main
    rv = self.invoke(ctx)
  File "c:\python27\lib\site-packages\pipenv\vendor\click\core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\python27\lib\site-packages\pipenv\vendor\click\core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\python27\lib\site-packages\pipenv\vendor\click\core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "c:\python27\lib\site-packages\pipenv\cli.py", line 435, in install
    selective_upgrade=selective_upgrade,
  File "c:\python27\lib\site-packages\pipenv\core.py", line 1943, in do_install
    pypi_mirror=pypi_mirror,
  File "c:\python27\lib\site-packages\pipenv\core.py", line 1312, in do_init
    pypi_mirror=pypi_mirror,
  File "c:\python27\lib\site-packages\pipenv\core.py", line 1057, in do_lock
    settings['packages'], project, r=False, include_index=True
  File "c:\python27\lib\site-packages\pipenv\utils.py", line 513, in convert_deps_to_pip
    new_dep = Requirement.from_pipfile(dep_name, dep)
  File "c:\python27\lib\site-packages\pipenv\vendor\requirementslib\models\requirements.py", line 766, in from_pipfile
    r = NamedRequirement.from_pipfile(name, pipfile)
  File "c:\python27\lib\site-packages\pipenv\vendor\requirementslib\models\requirements.py", line 88, in from_pipfile
    return cls(**creation_args)
  File "<attrs generated init a6e0ca26c49ba3dc9d3385e0a2ff78e4bcd1f859>", line 9, in __init__
  File "c:\python27\lib\site-packages\pipenv\vendor\attr\validators.py", line 106, in __call__
    self.validator(inst, attr, value)
  File "c:\python27\lib\site-packages\pipenv\vendor\requirementslib\models\utils.py", line 140, in validate_specifiers
    except (InvalidMarker, InvalidSpecifier):
NameError: global name 'InvalidMarker' is not defined
c:\python27\lib\site-packages\pipenv\_compat.py:113: ResourceWarning: Implicitly cleaning up <TemporaryDirectory 'c:\\users\\bobh\\appdata\\local\\temp\\pipenv-ai84cx-requirements'>
  warnings.warn(warn_message, ResourceWarning)

C:\SRC\GitHub\pysilfont>

Steps to replicate

pipenv.exe install --verbose

Pipfile is show within the pipenv --support output included below.

---

$ pipenv --support

Pipenv version: '2018.7.1'

Pipenv location: 'c:\\python27\\lib\\site-packages\\pipenv'

Python location: 'c:\\python27\\python.exe'

Other Python installations in PATH:

• 2.7: C:\Python27\python.exe

• 2.7.13: C:\Python27\python.exe

• 3.7.0: C:\Windows\py.exe

PEP 508 Information:

{'implementation_name': 'cpython',
 'implementation_version': '0',
 'os_name': 'nt',
 'platform_machine': 'AMD64',
 'platform_python_implementation': 'CPython',
 'platform_release': '10',
 'platform_system': 'Windows',
 'platform_version': '10.0.17134',
 'python_full_version': '2.7.13',
 'python_version': '2.7',
 'sys_platform': 'win32'}

System environment variables:

• TMP
• COMPUTERNAME
• USERDOMAIN
• PSMODULEPATH
• PYTHONDONTWRITEBYTECODE
• COMMONPROGRAMFILES
• PROCESSOR_IDENTIFIER
• VBOX_MSI_INSTALL_PATH
• PROGRAMFILES
• PROCESSOR_REVISION
• PATH
• SYSTEMROOT
• PROGRAMFILES(X86)
• COMSPEC
• DRIVERDATA
• TEMP
• COMMONPROGRAMFILES(X86)
• GDLPP_PREFS
• PROCESSOR_ARCHITECTURE
• ALLUSERSPROFILE
• LOCALAPPDATA
• HOMEPATH
• USERDOMAIN_ROAMINGPROFILE
• PROGRAMW6432
• USERNAME
• LOGONSERVER
• PROMPT
• SESSIONNAME
• PROGRAMDATA
• ONEDRIVE
• PERLLIB
• PATHEXT
• PIP_PYTHON_PATH
• ASL.LOG
• WINDIR
• APPDATA
• HOMEDRIVE
• SYSTEMDRIVE
• NUMBER_OF_PROCESSORS
• SAL_DISABLE_GRAPHITE
• PROCESSOR_LEVEL
• PROCESSOR_ARCHITEW6432
• COMMONPROGRAMW6432
• OS
• PUBLIC
• USERPROFILE

PipenvΓÇôspecific environment variables:

DebugΓÇôspecific environment variables:

• PATH: C:\Program Files (x86)\Intel\iCLS Client\;C:\Python27\;C:\Python27\Scripts;C:\DosUtils;C:\Program Files (x86)\GnuWin32\bin;C:\Program Files\Intel\iCLS Client\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\TortoiseSVN\bin;C:\Program Files\IDM Computer Solutions\UltraEdit;C:\Program Files\IDM Computer Solutions\UltraCompare;C:\Program Files\PuTTY\;C:\DosUtils\Libxml;C:\Strawberry\c\bin;C:\Strawberry\perl\site\bin;C:\Strawberry\perl\bin;C:\Program Files (x86)\Common Files\Acronis\VirtualFile\;C:\Program Files (x86)\Common Files\Acronis\VirtualFile64\;C:\Program Files (x86)\Common Files\Acronis\SnapAPI\;C:\Program Files\TortoiseHg\;C:\Program Files (x86)\Common Files\Acronis\FileProtector\;C:\Program Files (x86)\Common Files\Acronis\FileProtector64\;C:\HashiCorp\Vagrant\bin;C:\Program Files\Graphite Compiler\;C:\Program Files (x86)\Adobe\FDK\Tools\win;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Users\bobh\AppData\Local\Microsoft\WindowsApps;C:\Users\bobh\AppData\Local\atom\bin;C:\Users\bobh\AppData\Local\Microsoft\WindowsApps;C:\Users\bobh\AppData\Local\Atlassian\SourceTree\git_local\mingw32\bin\;

---

Contents of Pipfile (‘C:\SRC\GitHub\pysilfont\Pipfile’):

[[source]]
url = "https://pypi.python.org/simple"
verify_ssl = true
name = "pypi"

[packages]
glyphsLib = "2.4.0"

[dev-packages]
glyphsLib = "2.4.0"

[requires]
python_version = "2.7"

[pipenv]
allow_prereleases = true

[fmarmol]

@bobh0303 The right syntax generated by pipenv install glyphsLib==2.4.0 is:

[packages]
glyphslib = "==2.4.0"

[jwflory]

This would be helpful to include in the example documentation, either for Pipenv or Pipfile. I was stuck with the same problem and didn’t realize it was a formatting issue.