diff --git a/news/9891612D-8317-4A33-B373-9AAAD1CDA4DA.trivial b/news/9891612D-8317-4A33-B373-9AAAD1CDA4DA.trivial
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/src/pip/_internal/cli/cmdoptions.py b/src/pip/_internal/cli/cmdoptions.py
index 3033cd4b5e6..7a2fcbff6b2 100644
--- a/src/pip/_internal/cli/cmdoptions.py
+++ b/src/pip/_internal/cli/cmdoptions.py
@@ -22,10 +22,13 @@
 from pip._internal.utils.ui import BAR_TYPES
 
 if MYPY_CHECK_RUNNING:
-    from typing import Any  # noqa: F401
+    from typing import Any, Callable, Dict, List, Optional, Union  # noqa: F401
+    from optparse import OptionParser, Values  # noqa: F401
+    from pip._internal.cli.parser import ConfigOptionParser  # noqa: F401
 
 
 def make_option_group(group, parser):
+    # type: (Dict[str, Any], ConfigOptionParser) -> OptionGroup
     """
     Return an OptionGroup object
     group  -- assumed to be dict with 'name' and 'options' keys
@@ -38,6 +41,7 @@ def make_option_group(group, parser):
 
 
 def check_install_build_global(options, check_options=None):
+    # type: (Values, Optional[Values]) -> None
     """Disable wheels if per-setup.py call options are set.
 
     :param options: The OptionParser options to update.
@@ -60,6 +64,7 @@ def getname(n):
 
 
 def check_dist_restriction(options, check_target=False):
+    # type: (Values, bool) -> None
     """Function for determining if custom platform options are allowed.
 
     :param options: The OptionParser options.
@@ -108,7 +113,7 @@ def check_dist_restriction(options, check_target=False):
     dest='help',
     action='help',
     help='Show help.',
-)  # type: Any
+)  # type: partial[Option]
 
 isolated_mode = partial(
     Option,
@@ -120,7 +125,7 @@ def check_dist_restriction(options, check_target=False):
         "Run pip in an isolated mode, ignoring environment variables and user "
         "configuration."
     ),
-)
+)  # type: partial[Option]
 
 require_virtualenv = partial(
     Option,
@@ -130,7 +135,7 @@ def check_dist_restriction(options, check_target=False):
     action='store_true',
     default=False,
     help=SUPPRESS_HELP
-)  # type: Any
+)  # type: partial[Option]
 
 verbose = partial(
     Option,
@@ -139,7 +144,7 @@ def check_dist_restriction(options, check_target=False):
     action='count',
     default=0,
     help='Give more output. Option is additive, and can be used up to 3 times.'
-)
+)  # type: partial[Option]
 
 no_color = partial(
     Option,
@@ -148,7 +153,7 @@ def check_dist_restriction(options, check_target=False):
     action='store_true',
     default=False,
     help="Suppress colored output",
-)
+)  # type: partial[Option]
 
 version = partial(
     Option,
@@ -156,7 +161,7 @@ def check_dist_restriction(options, check_target=False):
     dest='version',
     action='store_true',
     help='Show version and exit.',
-)  # type: Any
+)  # type: partial[Option]
 
 quiet = partial(
     Option,
@@ -169,7 +174,7 @@ def check_dist_restriction(options, check_target=False):
         ' times (corresponding to WARNING, ERROR, and CRITICAL logging'
         ' levels).'
     ),
-)  # type: Any
+)  # type: partial[Option]
 
 progress_bar = partial(
     Option,
@@ -182,7 +187,7 @@ def check_dist_restriction(options, check_target=False):
         'Specify type of progress to be displayed [' +
         '|'.join(BAR_TYPES.keys()) + '] (default: %default)'
     ),
-)  # type: Any
+)  # type: partial[Option]
 
 log = partial(
     Option,
@@ -190,7 +195,7 @@ def check_dist_restriction(options, check_target=False):
     dest="log",
     metavar="path",
     help="Path to a verbose appending log."
-)  # type: Any
+)  # type: partial[Option]
 
 no_input = partial(
     Option,
@@ -200,7 +205,7 @@ def check_dist_restriction(options, check_target=False):
     action='store_true',
     default=False,
     help=SUPPRESS_HELP
-)  # type: Any
+)  # type: partial[Option]
 
 proxy = partial(
     Option,
@@ -209,7 +214,7 @@ def check_dist_restriction(options, check_target=False):
     type='str',
     default='',
     help="Specify a proxy in the form [user:passwd@]proxy.server:port."
-)  # type: Any
+)  # type: partial[Option]
 
 retries = partial(
     Option,
@@ -219,7 +224,7 @@ def check_dist_restriction(options, check_target=False):
     default=5,
     help="Maximum number of retries each connection should attempt "
          "(default %default times).",
-)  # type: Any
+)  # type: partial[Option]
 
 timeout = partial(
     Option,
@@ -229,7 +234,7 @@ def check_dist_restriction(options, check_target=False):
     type='float',
     default=15,
     help='Set the socket timeout (default %default seconds).',
-)  # type: Any
+)  # type: partial[Option]
 
 skip_requirements_regex = partial(
     Option,
@@ -239,10 +244,11 @@ def check_dist_restriction(options, check_target=False):
     type='str',
     default='',
     help=SUPPRESS_HELP,
-)  # type: Any
+)  # type: partial[Option]
 
 
 def exists_action():
+    # type: () -> Option
     return Option(
         # Option when path already exist
         '--exists-action',
@@ -264,7 +270,7 @@ def exists_action():
     type='str',
     metavar='path',
     help="Path to alternate CA bundle.",
-)  # type: Any
+)  # type: partial[Option]
 
 client_cert = partial(
     Option,
@@ -275,7 +281,7 @@ def exists_action():
     metavar='path',
     help="Path to SSL client certificate, a single file containing the "
          "private key and the certificate in PEM format.",
-)  # type: Any
+)  # type: partial[Option]
 
 index_url = partial(
     Option,
@@ -287,7 +293,7 @@ def exists_action():
          "This should point to a repository compliant with PEP 503 "
          "(the simple repository API) or a local directory laid out "
          "in the same format.",
-)  # type: Any
+)  # type: partial[Option]
 
 
 def extra_index_url():
@@ -310,10 +316,11 @@ def extra_index_url():
     action='store_true',
     default=False,
     help='Ignore package index (only looking at --find-links URLs instead).',
-)  # type: Any
+)  # type: partial[Option]
 
 
 def find_links():
+    # type: () -> Option
     return Option(
         '-f', '--find-links',
         dest='find_links',
@@ -327,6 +334,7 @@ def find_links():
 
 
 def trusted_host():
+    # type: () -> Option
     return Option(
         "--trusted-host",
         dest="trusted_hosts",
@@ -346,10 +354,11 @@ def trusted_host():
     action="store_true",
     default=False,
     help="Enable the processing of dependency links.",
-)  # type: Any
+)  # type: partial[Option]
 
 
 def constraints():
+    # type: () -> Option
     return Option(
         '-c', '--constraint',
         dest='constraints',
@@ -362,6 +371,7 @@ def constraints():
 
 
 def requirements():
+    # type: () -> Option
     return Option(
         '-r', '--requirement',
         dest='requirements',
@@ -374,6 +384,7 @@ def requirements():
 
 
 def editable():
+    # type: () -> Option
     return Option(
         '-e', '--editable',
         dest='editables',
@@ -394,15 +405,17 @@ def editable():
     help='Directory to check out editable projects into. '
     'The default in a virtualenv is "<venv path>/src". '
     'The default for global installs is "<current dir>/src".'
-)  # type: Any
+)  # type: partial[Option]
 
 
 def _get_format_control(values, option):
+    # type: (Values, Option) -> Any
     """Get a format_control object."""
     return getattr(values, option.dest)
 
 
 def _handle_no_binary(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
     existing = _get_format_control(parser.values, option)
     FormatControl.handle_mutual_excludes(
         value, existing.no_binary, existing.only_binary,
@@ -410,6 +423,7 @@ def _handle_no_binary(option, opt_str, value, parser):
 
 
 def _handle_only_binary(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
     existing = _get_format_control(parser.values, option)
     FormatControl.handle_mutual_excludes(
         value, existing.only_binary, existing.no_binary,
@@ -417,6 +431,7 @@ def _handle_only_binary(option, opt_str, value, parser):
 
 
 def no_binary():
+    # type: () -> Option
     format_control = FormatControl(set(), set())
     return Option(
         "--no-binary", dest="format_control", action="callback",
@@ -432,6 +447,7 @@ def no_binary():
 
 
 def only_binary():
+    # type: () -> Option
     format_control = FormatControl(set(), set())
     return Option(
         "--only-binary", dest="format_control", action="callback",
@@ -454,7 +470,7 @@ def only_binary():
     default=None,
     help=("Only use wheels compatible with <platform>. "
           "Defaults to the platform of the running system."),
-)
+)  # type: partial[Option]
 
 
 python_version = partial(
@@ -469,7 +485,7 @@ def only_binary():
           "version (e.g. '2') can be specified to match all "
           "minor revs of that major version.  A minor version "
           "(e.g. '34') can also be specified."),
-)
+)  # type: partial[Option]
 
 
 implementation = partial(
@@ -483,7 +499,7 @@ def only_binary():
           " or 'ip'. If not specified, then the current "
           "interpreter implementation is used.  Use 'py' to force "
           "implementation-agnostic wheels."),
-)
+)  # type: partial[Option]
 
 
 abi = partial(
@@ -498,10 +514,11 @@ def only_binary():
           "you will need to specify --implementation, "
           "--platform, and --python-version when using "
           "this option."),
-)
+)  # type: partial[Option]
 
 
 def prefer_binary():
+    # type: () -> Option
     return Option(
         "--prefer-binary",
         dest="prefer_binary",
@@ -518,7 +535,7 @@ def prefer_binary():
     default=USER_CACHE_DIR,
     metavar="dir",
     help="Store the cache data in <dir>."
-)
+)  # type: partial[Option]
 
 no_cache = partial(
     Option,
@@ -526,7 +543,7 @@ def prefer_binary():
     dest="cache_dir",
     action="store_false",
     help="Disable the cache.",
-)
+)  # type: partial[Option]
 
 no_deps = partial(
     Option,
@@ -535,7 +552,7 @@ def prefer_binary():
     action='store_true',
     default=False,
     help="Don't install package dependencies.",
-)  # type: Any
+)  # type: partial[Option]
 
 build_dir = partial(
     Option,
@@ -547,7 +564,7 @@ def prefer_binary():
          'The location of temporary directories can be controlled by setting '
          'the TMPDIR environment variable (TEMP on Windows) appropriately. '
          'When passed, build directories are not cleaned in case of failures.'
-)  # type: Any
+)  # type: partial[Option]
 
 ignore_requires_python = partial(
     Option,
@@ -555,7 +572,7 @@ def prefer_binary():
     dest='ignore_requires_python',
     action='store_true',
     help='Ignore the Requires-Python information.'
-)  # type: Any
+)  # type: partial[Option]
 
 no_build_isolation = partial(
     Option,
@@ -566,7 +583,7 @@ def prefer_binary():
     help='Disable isolation when building a modern source distribution. '
          'Build dependencies specified by PEP 518 must be already installed '
          'if this option is used.'
-)  # type: Any
+)  # type: partial[Option]
 
 install_options = partial(
     Option,
@@ -579,7 +596,7 @@ def prefer_binary():
          "bin\"). Use multiple --install-option options to pass multiple "
          "options to setup.py install. If you are using an option with a "
          "directory path, be sure to use absolute path.",
-)  # type: Any
+)  # type: partial[Option]
 
 global_options = partial(
     Option,
@@ -589,7 +606,7 @@ def prefer_binary():
     metavar='options',
     help="Extra global options to be supplied to the setup.py "
          "call before the install command.",
-)  # type: Any
+)  # type: partial[Option]
 
 no_clean = partial(
     Option,
@@ -597,7 +614,7 @@ def prefer_binary():
     action='store_true',
     default=False,
     help="Don't clean up build directories."
-)  # type: Any
+)  # type: partial[Option]
 
 pre = partial(
     Option,
@@ -606,7 +623,7 @@ def prefer_binary():
     default=False,
     help="Include pre-release and development versions. By default, "
          "pip only finds stable versions.",
-)  # type: Any
+)  # type: partial[Option]
 
 disable_pip_version_check = partial(
     Option,
@@ -616,7 +633,7 @@ def prefer_binary():
     default=False,
     help="Don't periodically check PyPI to determine whether a new version "
          "of pip is available for download. Implied with --no-index.",
-)  # type: Any
+)  # type: partial[Option]
 
 
 # Deprecated, Remove later
@@ -626,10 +643,11 @@ def prefer_binary():
     dest='always_unzip',
     action='store_true',
     help=SUPPRESS_HELP,
-)  # type: Any
+)  # type: partial[Option]
 
 
 def _merge_hash(option, opt_str, value, parser):
+    # type: (Option, str, str, OptionParser) -> None
     """Given a value spelled "algo:digest", append the digest to a list
     pointed to in a dict by the algo name."""
     if not parser.values.hashes:
@@ -657,7 +675,7 @@ def _merge_hash(option, opt_str, value, parser):
     type='string',
     help="Verify that the package's archive matches this "
          'hash before installing. Example: --hash=sha256:abcdef...',
-)  # type: Any
+)  # type: partial[Option]
 
 
 require_hashes = partial(
@@ -669,7 +687,7 @@ def _merge_hash(option, opt_str, value, parser):
     help='Require a hash to check each requirement against, for '
          'repeatable installs. This option is implied when any package in a '
          'requirements file has a --hash option.',
-)  # type: Any
+)  # type: partial[Option]
 
 
 ##########
@@ -700,7 +718,7 @@ def _merge_hash(option, opt_str, value, parser):
         disable_pip_version_check,
         no_color,
     ]
-}
+}  # type: Dict[str, Any]
 
 index_group = {
     'name': 'Package Index Options',
@@ -711,4 +729,4 @@ def _merge_hash(option, opt_str, value, parser):
         find_links,
         process_dependency_links,
     ]
-}
+}  # type: Dict[str, Any]
diff --git a/src/pip/_internal/models/format_control.py b/src/pip/_internal/models/format_control.py
index 27488563669..126519827cc 100644
--- a/src/pip/_internal/models/format_control.py
+++ b/src/pip/_internal/models/format_control.py
@@ -1,5 +1,10 @@
 from pip._vendor.packaging.utils import canonicalize_name
 
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Optional, Set  # noqa: F401
+
 
 class FormatControl(object):
     """A helper class for controlling formats from which packages are installed.
@@ -9,6 +14,7 @@ class FormatControl(object):
     are listed, with any given package only showing up in one field at a time.
     """
     def __init__(self, no_binary=None, only_binary=None):
+        # type: (Optional[Set], Optional[Set]) -> None
         self.no_binary = set() if no_binary is None else no_binary
         self.only_binary = set() if only_binary is None else only_binary
 
@@ -27,6 +33,7 @@ def __repr__(self):
 
     @staticmethod
     def handle_mutual_excludes(value, target, other):
+        # type: (str, Optional[Set], Optional[Set]) -> None
         new = value.split(',')
         while ':all:' in new:
             other.clear()