--- a/env/lib/python3.7/site-packages/distlib/markers.py	Thu May 14 16:47:39 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,131 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2012-2017 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-"""
-Parser for the environment markers micro-language defined in PEP 508.
-"""
-
-# Note: In PEP 345, the micro-language was Python compatible, so the ast
-# module could be used to parse it. However, PEP 508 introduced operators such
-# as ~= and === which aren't in Python, necessitating a different approach.
-
-import os
-import sys
-import platform
-import re
-
-from .compat import python_implementation, urlparse, string_types
-from .util import in_venv, parse_marker
-
-__all__ = ['interpret']
-
-def _is_literal(o):
-    if not isinstance(o, string_types) or not o:
-        return False
-    return o[0] in '\'"'
-
-class Evaluator(object):
-    """
-    This class is used to evaluate marker expessions.
-    """
-
-    operations = {
-        '==': lambda x, y: x == y,
-        '===': lambda x, y: x == y,
-        '~=': lambda x, y: x == y or x > y,
-        '!=': lambda x, y: x != y,
-        '<':  lambda x, y: x < y,
-        '<=':  lambda x, y: x == y or x < y,
-        '>':  lambda x, y: x > y,
-        '>=':  lambda x, y: x == y or x > y,
-        'and': lambda x, y: x and y,
-        'or': lambda x, y: x or y,
-        'in': lambda x, y: x in y,
-        'not in': lambda x, y: x not in y,
-    }
-
-    def evaluate(self, expr, context):
-        """
-        Evaluate a marker expression returned by the :func:`parse_requirement`
-        function in the specified context.
-        """
-        if isinstance(expr, string_types):
-            if expr[0] in '\'"':
-                result = expr[1:-1]
-            else:
-                if expr not in context:
-                    raise SyntaxError('unknown variable: %s' % expr)
-                result = context[expr]
-        else:
-            assert isinstance(expr, dict)
-            op = expr['op']
-            if op not in self.operations:
-                raise NotImplementedError('op not implemented: %s' % op)
-            elhs = expr['lhs']
-            erhs = expr['rhs']
-            if _is_literal(expr['lhs']) and _is_literal(expr['rhs']):
-                raise SyntaxError('invalid comparison: %s %s %s' % (elhs, op, erhs))
-
-            lhs = self.evaluate(elhs, context)
-            rhs = self.evaluate(erhs, context)
-            result = self.operations[op](lhs, rhs)
-        return result
-
-def default_context():
-    def format_full_version(info):
-        version = '%s.%s.%s' % (info.major, info.minor, info.micro)
-        kind = info.releaselevel
-        if kind != 'final':
-            version += kind[0] + str(info.serial)
-        return version
-
-    if hasattr(sys, 'implementation'):
-        implementation_version = format_full_version(sys.implementation.version)
-        implementation_name = sys.implementation.name
-    else:
-        implementation_version = '0'
-        implementation_name = ''
-
-    result = {
-        'implementation_name': implementation_name,
-        'implementation_version': implementation_version,
-        'os_name': os.name,
-        'platform_machine': platform.machine(),
-        'platform_python_implementation': platform.python_implementation(),
-        'platform_release': platform.release(),
-        'platform_system': platform.system(),
-        'platform_version': platform.version(),
-        'platform_in_venv': str(in_venv()),
-        'python_full_version': platform.python_version(),
-        'python_version': platform.python_version()[:3],
-        'sys_platform': sys.platform,
-    }
-    return result
-
-DEFAULT_CONTEXT = default_context()
-del default_context
-
-evaluator = Evaluator()
-
-def interpret(marker, execution_context=None):
-    """
-    Interpret a marker and return a result depending on environment.
-
-    :param marker: The marker to interpret.
-    :type marker: str
-    :param execution_context: The context used for name lookup.
-    :type execution_context: mapping
-    """
-    try:
-        expr, rest = parse_marker(marker)
-    except Exception as e:
-        raise SyntaxError('Unable to interpret marker syntax: %s: %s' % (marker, e))
-    if rest and rest[0] != '#':
-        raise SyntaxError('unexpected trailing data in marker: %s: %s' % (marker, rest))
-    context = dict(DEFAULT_CONTEXT)
-    if execution_context:
-        context.update(execution_context)
-    return evaluator.evaluate(expr, context)