diff --git a/src/azure-cli-core/azure/cli/core/__init__.py b/src/azure-cli-core/azure/cli/core/__init__.py
index fc4dcae82c1..4fa55c0bfd4 100644
--- a/src/azure-cli-core/azure/cli/core/__init__.py
+++ b/src/azure-cli-core/azure/cli/core/__init__.py
@@ -9,9 +9,7 @@
 import os
 import sys
 import json
-import timeit
-import concurrent.futures
-from concurrent.futures import ThreadPoolExecutor
+import time
 
 from knack.cli import CLI
 from knack.commands import CLICommandsLoader
@@ -322,14 +320,14 @@ def _update_command_table_from_modules(args, command_modules=None):
                 except ImportError as e:
                     logger.warning(e)
 
-            start_time = timeit.default_timer()
+            start_time = time.perf_counter()
             logger.debug("Loading command modules...")
             results = self._load_modules(args, command_modules)
 
             count, cumulative_group_count, cumulative_command_count = \
                 self._process_results_with_timing(results)
 
-            total_elapsed_time = timeit.default_timer() - start_time
+            total_elapsed_time = time.perf_counter() - start_time
             # Summary line
             logger.debug(self.item_format_string,
                          "Total ({})".format(count), total_elapsed_time,
@@ -404,7 +402,7 @@ def _filter_modname(extensions):
                     # Add to the map. This needs to happen before we load commands as registering a command
                     # from an extension requires this map to be up-to-date.
                     # self._mod_to_ext_map[ext_mod] = ext_name
-                    start_time = timeit.default_timer()
+                    start_time = time.perf_counter()
                     extension_command_table, extension_group_table, extension_command_loader = \
                         _load_extension_command_loader(self, args, ext_mod)
                     import_extension_breaking_changes(ext_mod)
@@ -427,7 +425,7 @@ def _filter_modname(extensions):
                     self.command_table.update(extension_command_table)
                     self.command_group_table.update(extension_group_table)
 
-                    elapsed_time = timeit.default_timer() - start_time
+                    elapsed_time = time.perf_counter() - start_time
                     logger.debug(self.item_ext_format_string, ext_name, elapsed_time,
                                  len(extension_group_table), len(extension_command_table),
                                  ext_dir)
@@ -667,6 +665,8 @@ def load_arguments(self, command=None):
 
     def _load_modules(self, args, command_modules):
         """Load command modules using ThreadPoolExecutor with timeout protection."""
+        import concurrent.futures
+        from concurrent.futures import ThreadPoolExecutor
         from azure.cli.core.commands import BLOCKED_MODS
 
         results = []
@@ -708,10 +708,10 @@ def _load_single_module(self, mod, args):
         from azure.cli.core.commands import _load_module_command_loader
         import traceback
         try:
-            start_time = timeit.default_timer()
+            start_time = time.perf_counter()
             module_command_table, module_group_table, command_loader = _load_module_command_loader(self, args, mod)
             import_module_breaking_changes(mod)
-            elapsed_time = timeit.default_timer() - start_time
+            elapsed_time = time.perf_counter() - start_time
             return ModuleLoadResult(mod, module_command_table, module_group_table, elapsed_time, command_loader=command_loader)
         except Exception as ex:  # pylint: disable=broad-except
             tb_str = traceback.format_exc()
@@ -1227,7 +1227,7 @@ def update(self, command_table):
 
         :param command_table: The command table built by azure.cli.core.MainCommandsLoader.load_command_table
         """
-        start_time = timeit.default_timer()
+        start_time = time.perf_counter()
         self.INDEX[self._COMMAND_INDEX_VERSION] = __version__
         self.INDEX[self._COMMAND_INDEX_CLOUD_PROFILE] = self.cloud_profile
         from collections import defaultdict
@@ -1242,7 +1242,7 @@ def update(self, command_table):
             if module_name not in index[top_command]:
                 index[top_command].append(module_name)
 
-        elapsed_time = timeit.default_timer() - start_time
+        elapsed_time = time.perf_counter() - start_time
         self.INDEX[self._COMMAND_INDEX] = index
 
         self.update_extension_index(command_table)
diff --git a/src/azure-cli-core/azure/cli/core/_help_loaders.py b/src/azure-cli-core/azure/cli/core/_help_loaders.py
index 7be465e1b97..d97fe3c3833 100644
--- a/src/azure-cli-core/azure/cli/core/_help_loaders.py
+++ b/src/azure-cli-core/azure/cli/core/_help_loaders.py
@@ -11,8 +11,6 @@
 from knack.util import CLIError
 from knack.log import get_logger
 
-import yaml
-
 logger = get_logger(__name__)
 
 try:
@@ -132,6 +130,8 @@ def _get_yaml_help_files_list(nouns, cmd_loader_map_ref):
 
     @staticmethod
     def _parse_yaml_from_string(text, help_file_path):
+        import yaml
+
         dir_name, base_name = os.path.split(help_file_path)
         pretty_file_path = os.path.join(os.path.basename(dir_name), base_name)
 
diff --git a/src/azure-cli-core/azure/cli/core/aaz/_client.py b/src/azure-cli-core/azure/cli/core/aaz/_client.py
index 4d39bedaab0..0455bc7679c 100644
--- a/src/azure-cli-core/azure/cli/core/aaz/_client.py
+++ b/src/azure-cli-core/azure/cli/core/aaz/_client.py
@@ -8,7 +8,6 @@
 from azure.core.polling.base_polling import LocationPolling, StatusCheckPolling
 from abc import abstractmethod
 
-from ._poller import AAZNoPolling, AAZBasePolling
 from azure.cli.core.cloud import (CloudEndpointNotSetException, CloudSuffixNotSetException,
                                   CloudNameEnum as _CloudNameEnum)
 
@@ -111,6 +110,7 @@ def send_request(self, request, stream=False, **kwargs):  # pylint: disable=argu
     def build_lro_polling(self, no_wait, initial_session, deserialization_callback, error_callback,
                           lro_options=None, path_format_arguments=None):
         from azure.core.polling.base_polling import OperationResourcePolling
+        from ._poller import AAZNoPolling, AAZBasePolling
         if no_wait == True:  # noqa: E712, pylint: disable=singleton-comparison
             polling = AAZNoPolling()
         else:
@@ -233,6 +233,7 @@ def _build_per_call_policies(cls, ctx, **kwargs):
     def build_lro_polling(self, no_wait, initial_session, deserialization_callback, error_callback,
                           lro_options=None, path_format_arguments=None):
         from azure.mgmt.core.polling.arm_polling import AzureAsyncOperationPolling, BodyContentPolling
+        from ._poller import AAZNoPolling, AAZBasePolling
         if no_wait == True:  # noqa: E712, pylint: disable=singleton-comparison
             polling = AAZNoPolling()
         else:
diff --git a/src/azure-cli-core/azure/cli/core/aaz/_command.py b/src/azure-cli-core/azure/cli/core/aaz/_command.py
index 577d8a7cf45..e47c461315e 100644
--- a/src/azure-cli-core/azure/cli/core/aaz/_command.py
+++ b/src/azure-cli-core/azure/cli/core/aaz/_command.py
@@ -22,7 +22,6 @@
 from ._base import AAZUndefined, AAZBaseValue
 from ._field_type import AAZObjectType
 from ._paging import AAZPaged
-from ._poller import AAZLROPoller
 from ._command_ctx import AAZCommandCtx
 from .exceptions import AAZUnknownFieldError, AAZUnregisteredArg
 from .utils import get_aaz_profile_module_name
@@ -235,6 +234,7 @@ def processor(schema, result):
     def build_lro_poller(self, executor, extract_result):
         """ Build AAZLROPoller instance to support long running operation
         """
+        from ._poller import AAZLROPoller
         polling_generator = executor()
         if self.ctx.lro_no_wait:
             # run until yield the first polling
diff --git a/src/azure-cli-core/azure/cli/core/commands/__init__.py b/src/azure-cli-core/azure/cli/core/commands/__init__.py
index a9dc9cfbc43..2700595662a 100644
--- a/src/azure-cli-core/azure/cli/core/commands/__init__.py
+++ b/src/azure-cli-core/azure/cli/core/commands/__init__.py
@@ -29,7 +29,6 @@
     get_command_type_kwarg, read_file_content, get_arg_list, poller_classes)
 from azure.cli.core.local_context import LocalContextAction
 from azure.cli.core import telemetry
-from azure.cli.core.commands.progress import IndeterminateProgressBar
 
 from knack.arguments import CLICommandArgument
 from knack.commands import CLICommand, CommandGroup, PREVIEW_EXPERIMENTAL_CONFLICT_ERROR
@@ -1035,10 +1034,20 @@ def __init__(self, cli_ctx, start_msg='', finish_msg='', poller_done_interval_ms
         self.deploy_dict = {}
         self.last_progress_report = datetime.datetime.now()
 
-        self.progress_bar = None
+        self._progress_bar = None
         disable_progress_bar = self.cli_ctx.config.getboolean('core', 'disable_progress_bar', False)
-        if not disable_progress_bar and not cli_ctx.only_show_errors:
-            self.progress_bar = progress_bar if progress_bar is not None else IndeterminateProgressBar(cli_ctx)
+        self.disable_progress_bar = disable_progress_bar or cli_ctx.only_show_errors
+        if not self.disable_progress_bar:
+            self._progress_bar = progress_bar
+
+    @property
+    def progress_bar(self):
+        if self.disable_progress_bar:
+            return None
+        if self._progress_bar is None:
+            from azure.cli.core.commands.progress import IndeterminateProgressBar
+            self._progress_bar = IndeterminateProgressBar(self.cli_ctx)
+        return self._progress_bar
 
     def _delay(self):
         time.sleep(self.poller_done_interval_ms / 1000.0)
diff --git a/src/azure-cli-core/azure/cli/core/commands/parameters.py b/src/azure-cli-core/azure/cli/core/commands/parameters.py
index c098d1a42a1..ad09007fbb3 100644
--- a/src/azure-cli-core/azure/cli/core/commands/parameters.py
+++ b/src/azure-cli-core/azure/cli/core/commands/parameters.py
@@ -5,7 +5,7 @@
 
 
 import argparse
-import platform
+import sys
 
 from azure.cli.core import EXCLUDED_PARAMS
 from azure.cli.core.commands.constants import CLI_PARAM_KWARGS, CLI_POSITIONAL_PARAM_KWARGS
@@ -274,7 +274,7 @@ def get_location_type(cli_ctx):
     validator=generate_deployment_name
 )
 
-quotes = '""' if platform.system() == 'Windows' else "''"
+quotes = '""' if sys.platform == 'win32' else "''"
 quote_text = 'Use {} to clear existing tags.'.format(quotes)
 
 tags_type = CLIArgumentType(
diff --git a/src/azure-cli-core/azure/cli/core/commands/progress.py b/src/azure-cli-core/azure/cli/core/commands/progress.py
index 4a68389c619..f6ec6abfa5e 100644
--- a/src/azure-cli-core/azure/cli/core/commands/progress.py
+++ b/src/azure-cli-core/azure/cli/core/commands/progress.py
@@ -4,8 +4,6 @@
 # --------------------------------------------------------------------------------------------
 import sys
 
-from humanfriendly.terminal.spinners import Spinner
-
 BAR_LEN = 70
 EMPTY_LINE = ' ' * BAR_LEN
 
@@ -114,6 +112,7 @@ def write(self, args):
         :param args: dictionary containing key 'message'
         """
         if self.spinner is None:
+            from humanfriendly.terminal.spinners import Spinner
             self.spinner = Spinner(  # pylint: disable=no-member
                 label='In Progress', stream=self.out, hide_cursor=False)
         msg = args.get('message', 'In Progress')
@@ -178,10 +177,15 @@ def __init__(self, cli_ctx, message="Running"):
         self.message = message
         self.hook = self.cli_ctx.get_progress_controller(
             det=False,
-            spinner=Spinner(  # pylint: disable=no-member
-                label='Running',
-                stream=sys.stderr,
-                hide_cursor=False))
+            spinner=self._create_spinner())
+
+    @staticmethod
+    def _create_spinner():
+        from humanfriendly.terminal.spinners import Spinner
+        return Spinner(  # pylint: disable=no-member
+            label='Running',
+            stream=sys.stderr,
+            hide_cursor=False)
 
     def begin(self):
         self.hook.begin()
diff --git a/src/azure-cli-core/azure/cli/core/commands/validators.py b/src/azure-cli-core/azure/cli/core/commands/validators.py
index 466fb284bfe..43a02a1f13d 100644
--- a/src/azure-cli-core/azure/cli/core/commands/validators.py
+++ b/src/azure-cli-core/azure/cli/core/commands/validators.py
@@ -5,7 +5,6 @@
 
 import argparse
 import time
-import random
 
 from azure.cli.core.profiles import ResourceType
 
@@ -67,6 +66,7 @@ def validate_key_value_pairs(string):
 
 def generate_deployment_name(namespace):
     if not namespace.deployment_name:
+        import random
         namespace.deployment_name = \
             'azurecli{}{}'.format(str(time.time()), str(random.randint(1, 100000)))
 
diff --git a/src/azure-cli-core/azure/cli/core/decorators.py b/src/azure-cli-core/azure/cli/core/decorators.py
index d59d0316912..71d7c37a0b1 100644
--- a/src/azure-cli-core/azure/cli/core/decorators.py
+++ b/src/azure-cli-core/azure/cli/core/decorators.py
@@ -10,7 +10,6 @@
 that it doesn't import modules other than those in the Python Standard Library
 """
 
-import hashlib
 from functools import wraps
 
 from knack.log import get_logger
@@ -43,6 +42,7 @@ def call_once(factory_func):
     def _wrapped(*args, **kwargs):
         if not factory_func.executed:
             factory_func.cached_result = factory_func(*args, **kwargs)
+            factory_func.executed = True
 
         return factory_func.cached_result
 
@@ -57,6 +57,7 @@ def hash256_result(func):
 
     @wraps(func)
     def _decorator(*args, **kwargs):
+        import hashlib
         val = func(*args, **kwargs)
         if val is None:
             raise ValueError('Return value is None')
diff --git a/src/azure-cli-core/azure/cli/core/extension/__init__.py b/src/azure-cli-core/azure/cli/core/extension/__init__.py
index 627f3fdd5c7..53afb00ecd9 100644
--- a/src/azure-cli-core/azure/cli/core/extension/__init__.py
+++ b/src/azure-cli-core/azure/cli/core/extension/__init__.py
@@ -10,7 +10,6 @@
 import re
 from sysconfig import get_path
 
-import pkginfo
 from knack.config import CLIConfig
 from knack.log import get_logger
 from azure.cli.core._config import GLOBAL_CONFIG_DIR, ENV_VAR_PREFIX
@@ -134,6 +133,7 @@ def get_version(self):
 
     def get_metadata(self):
         from glob import glob
+        import pkginfo
 
         metadata = {}
         ext_dir = self.path or get_extension_path(self.name)
@@ -213,6 +213,8 @@ def get_version(self):
         return self.metadata.get('version')
 
     def get_metadata(self):
+        import pkginfo
+
         metadata = {}
         ext_dir = self.path
         if not ext_dir or not os.path.isdir(ext_dir):
diff --git a/src/azure-cli-core/azure/cli/core/extension/operations.py b/src/azure-cli-core/azure/cli/core/extension/operations.py
index 83576a83d5f..e20aed58b03 100644
--- a/src/azure-cli-core/azure/cli/core/extension/operations.py
+++ b/src/azure-cli-core/azure/cli/core/extension/operations.py
@@ -13,7 +13,6 @@
 import traceback
 import hashlib
 from subprocess import check_output, STDOUT, CalledProcessError
-from urllib.parse import urlparse
 
 from packaging.version import parse
 
@@ -85,6 +84,7 @@ def _validate_whl_extension(ext_file):
 
 
 def _get_extension_info_from_source(source):
+    from urllib.parse import urlparse
     url_parse_result = urlparse(source)
     is_url = (url_parse_result.scheme == 'http' or url_parse_result.scheme == 'https')
     whl_filename = os.path.basename(url_parse_result.path) if is_url else os.path.basename(source)
@@ -96,6 +96,7 @@ def _get_extension_info_from_source(source):
 
 
 def _add_whl_ext(cli_ctx, source, ext_sha256=None, pip_extra_index_urls=None, pip_proxy=None, system=None):  # pylint: disable=too-many-statements
+    from urllib.parse import urlparse
     cli_ctx.get_progress_controller().add(message='Analyzing')
     if not source.endswith('.whl'):
         raise ValueError('Unknown extension type. Only Python wheels are supported.')
diff --git a/src/azure-cli-core/azure/cli/core/local_context.py b/src/azure-cli-core/azure/cli/core/local_context.py
index 1983c5ddc31..e2fa9f5d0e7 100644
--- a/src/azure-cli-core/azure/cli/core/local_context.py
+++ b/src/azure-cli-core/azure/cli/core/local_context.py
@@ -4,7 +4,6 @@
 # --------------------------------------------------------------------------------------------
 
 import os
-import shutil
 import configparser
 import enum
 
@@ -132,6 +131,7 @@ def delete_file(self, recursive=False):
                 os.remove(local_context_file.config_path)
                 parent_dir = os.path.dirname(local_context_file.config_path)
                 if not os.listdir(parent_dir):
+                    import shutil
                     shutil.rmtree(parent_dir)
                 logger.warning('Parameter persistence file in working directory %s is deleted.',
                                os.path.dirname(local_context_file.config_dir))
diff --git a/src/azure-cli-core/azure/cli/core/telemetry.py b/src/azure-cli-core/azure/cli/core/telemetry.py
index 21d79ecef36..aeb06ba35f2 100644
--- a/src/azure-cli-core/azure/cli/core/telemetry.py
+++ b/src/azure-cli-core/azure/cli/core/telemetry.py
@@ -131,6 +131,8 @@ def generate_payload(self):
         return _remove_symbols(payload)
 
     def _get_base_properties(self):
+        uname = platform.uname()
+
         return {
             'Reserved.ChannelUsed': 'AI',
             'Reserved.EventId': self.event_id,
@@ -151,9 +153,10 @@ def _get_base_properties(self):
                 self.product_version, self.module_version),
             'Context.Default.VS.Core.MacAddressHash': _get_hash_mac_address(),
             'Context.Default.VS.Core.Machine.Id': _get_hash_machine_id(),
-            'Context.Default.VS.Core.OS.Type': platform.system().lower(),  # eg. darwin, windows
-            'Context.Default.VS.Core.OS.Version': platform.version().lower(),  # eg. 10.0.14942
-            'Context.Default.VS.Core.OS.Platform': platform.platform().lower(),  # eg. windows-10-10.0.19041-sp0
+            'Context.Default.VS.Core.OS.Type': uname.system.lower(),  # eg. darwin, windows
+            'Context.Default.VS.Core.OS.Version': uname.version.lower(),  # eg. 10.0.14942
+            'Context.Default.VS.Core.OS.Platform': '{}-{}-{}-{}'.format(
+                uname.system, uname.release, uname.version, uname.machine).lower(),  # eg. windows-10-10.0.19041-sp0
             # the distro info is complement of platform info for linux
             'Context.Default.VS.Core.Distro.Name': _get_distro_name(),  # eg. 'CentOS Linux 8'
             'Context.Default.VS.Core.Distro.Id': _get_distro_id(),  # eg. 'centos'
diff --git a/src/azure-cli-core/azure/cli/core/util.py b/src/azure-cli-core/azure/cli/core/util.py
index ce64858bd09..b693ee00518 100644
--- a/src/azure-cli-core/azure/cli/core/util.py
+++ b/src/azure-cli-core/azure/cli/core/util.py
@@ -4,18 +4,12 @@
 # --------------------------------------------------------------------------------------------
 # pylint: disable=too-many-lines
 
-import base64
-import binascii
-import getpass
 import json
-import yaml
 import logging
 import os
 import platform
 import re
-import ssl
 import sys
-from urllib.request import urlopen
 
 from knack.log import get_logger
 from knack.util import CLIError, to_snake_case, to_camel_case
@@ -569,6 +563,7 @@ def get_file_json(file_path, throw_on_empty=True, preserve_order=False):
 
 
 def get_file_yaml(file_path, throw_on_empty=True):
+    import yaml  # Lazy-load: only needed when parsing YAML files
     content = read_file_content(file_path)
     if not content:
         if throw_on_empty:
@@ -593,6 +588,7 @@ def read_file_content(file_path, allow_binary=False):
 
     if allow_binary:
         try:
+            import base64
             with open(file_path, 'rb') as input_file:
                 logger.debug("attempting to read file %s as binary", file_path)
                 return base64.b64encode(input_file.read()).decode("utf-8")
@@ -643,6 +639,7 @@ def b64encode(s):
     :return: base64 encoded string
     :rtype: str
     """
+    import base64
     encoded = base64.b64encode(s.encode("latin-1"))
     return encoded.decode('latin-1')
 
@@ -654,6 +651,7 @@ def b64decode(s):
     :return: decoded string
     :rtype: str
     """
+    import base64
     encoded = base64.b64decode(s.encode("latin-1"))
     return encoded.decode('latin-1')
 
@@ -665,6 +663,8 @@ def b64_to_hex(s):
     :return: uppercase hex string
     :rtype: str
     """
+    import base64
+    import binascii
     decoded = base64.b64decode(s)
     hex_data = binascii.hexlify(decoded).upper()
     if isinstance(hex_data, bytes):
@@ -883,6 +883,7 @@ def reload_module(module):
 
 def get_default_admin_username():
     try:
+        import getpass
         username = getpass.getuser()
     except KeyError:
         username = None
@@ -1200,10 +1201,12 @@ def __exit__(self, exc_type, exc_val, exc_tb):
 
 
 def _ssl_context():
+    import ssl
     return ssl.create_default_context()
 
 
 def urlretrieve(url):
+    from urllib.request import urlopen
     req = urlopen(url, context=_ssl_context())
     return req.read()
 
@@ -1332,17 +1335,19 @@ def handle_version_update():
     """
     try:
         from azure.cli.core._session import VERSIONS
-        from packaging.version import parse  # pylint: disable=import-error,no-name-in-module
         from azure.cli.core import __version__
         if not VERSIONS['versions']:
             get_cached_latest_versions()
-        elif parse(VERSIONS['versions']['core']['local']) != parse(__version__):
-            logger.debug("Azure CLI has been updated.")
-            logger.debug("Clean up versions and refresh cloud endpoints information in local files.")
-            VERSIONS['versions'] = {}
-            VERSIONS['update_time'] = ''
-            from azure.cli.core.cloud import refresh_known_clouds
-            refresh_known_clouds()
+        elif VERSIONS['versions']['core']['local'] != __version__:
+            # Lazy import packaging.version
+            from packaging.version import parse  # pylint: disable=import-error,no-name-in-module
+            if parse(VERSIONS['versions']['core']['local']) != parse(__version__):
+                logger.debug("Azure CLI has been updated.")
+                logger.debug("Clean up versions and refresh cloud endpoints information in local files.")
+                VERSIONS['versions'] = {}
+                VERSIONS['update_time'] = ''
+                from azure.cli.core.cloud import refresh_known_clouds
+                refresh_known_clouds()
     except Exception as ex:  # pylint: disable=broad-except
         logger.warning(ex)
 
diff --git a/src/azure-cli-telemetry/azure/cli/telemetry/__init__.py b/src/azure-cli-telemetry/azure/cli/telemetry/__init__.py
index b9eb7ec1f86..fcc931d536f 100644
--- a/src/azure-cli-telemetry/azure/cli/telemetry/__init__.py
+++ b/src/azure-cli-telemetry/azure/cli/telemetry/__init__.py
@@ -5,8 +5,6 @@
 
 import sys
 import os
-import subprocess
-import portalocker
 
 from azure.cli.telemetry.util import save_payload
 
@@ -16,6 +14,7 @@
 
 
 def _start(config_dir, cache_dir):
+    import subprocess
     from azure.cli.telemetry.components.telemetry_logging import get_logger
 
     logger = get_logger('process')
@@ -100,6 +99,7 @@ def main():
         logger.info('Attempt start. Configuration directory [%s]. Cache directory [%s].', sys.argv[1], sys.argv[2])
 
         try:
+            import portalocker
             collection = RecordsCollection(cache_dir)
             collection.snapshot_and_read()
 
diff --git a/src/azure-cli-telemetry/azure/cli/telemetry/components/telemetry_client.py b/src/azure-cli-telemetry/azure/cli/telemetry/components/telemetry_client.py
index 5caeed563dc..b654da5526d 100644
--- a/src/azure-cli-telemetry/azure/cli/telemetry/components/telemetry_client.py
+++ b/src/azure-cli-telemetry/azure/cli/telemetry/components/telemetry_client.py
@@ -6,9 +6,6 @@
 import json
 import datetime
 
-import urllib.request as http_client_t
-from urllib.error import HTTPError
-
 from applicationinsights import TelemetryClient
 from applicationinsights.channel import SynchronousSender, SynchronousQueue, TelemetryChannel
 
@@ -92,6 +89,9 @@ def __init__(self):
 
     def send(self, data_to_send):
         """ Override the default resend mechanism in SenderBase. Stop resend when it fails."""
+        import urllib.request as http_client_t
+        from urllib.error import HTTPError
+
         request_payload = json.dumps([a.write() for a in data_to_send])
 
         content = bytearray(request_payload, 'utf-8')
diff --git a/src/azure-cli-telemetry/azure/cli/telemetry/util.py b/src/azure-cli-telemetry/azure/cli/telemetry/util.py
index 8c0a44a81e1..d9e72ed3f04 100644
--- a/src/azure-cli-telemetry/azure/cli/telemetry/util.py
+++ b/src/azure-cli-telemetry/azure/cli/telemetry/util.py
@@ -5,7 +5,6 @@
 
 import os
 import logging
-import logging.handlers
 
 
 def save_payload(config_dir, payload):
@@ -25,6 +24,7 @@ def save_payload(config_dir, payload):
 
 
 def _create_rotate_file_logger(log_dir):
+    from logging.handlers import RotatingFileHandler
     from datetime import datetime
     now = datetime.now()
     cache_name = os.path.join(log_dir, 'telemetry', now.strftime('%Y%m%d%H%M%S%f')[:-3], 'cache')
@@ -32,7 +32,7 @@ def _create_rotate_file_logger(log_dir):
         if not os.path.exists(os.path.dirname(cache_name)):
             os.makedirs(os.path.dirname(cache_name))
 
-        handler = logging.handlers.RotatingFileHandler(cache_name, maxBytes=128 * 1024, backupCount=100)
+        handler = RotatingFileHandler(cache_name, maxBytes=128 * 1024, backupCount=100)
         handler.setLevel(logging.INFO)
         handler.setFormatter(logging.Formatter(fmt='%(asctime)s,%(message)s',
                                                datefmt='%Y-%m-%dT%H:%M:%S'))