"python manage.py runserver" outputs the following error

[biabbas]

Watching for file changes with StatReloader
Performing system checks...

Exception in thread django-main-thread:
Traceback (most recent call last):
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/threading.py", line 932, in _bootstrap_inner
self.run()
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/utils/autoreload.py", line 53, in wrapper
fn(*args, **kwargs)
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/core/management/commands/runserver.py", line 117, in inner_run
self.check(display_num_errors=True)
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/core/management/base.py", line 392, in check
all_issues = self._run_checks(
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/core/management/base.py", line 382, in _run_checks
return checks.run_checks(**kwargs)
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/core/checks/registry.py", line 72, in run_checks
new_errors = check(app_configs=app_configs)
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/core/checks/urls.py", line 13, in check_url_config
return check_resolver(resolver)
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/core/checks/urls.py", line 23, in check_resolver
return check_method()
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/urls/resolvers.py", line 407, in check
for pattern in self.url_patterns:
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/utils/functional.py", line 48, in get
res = instance.dict[self.name] = self.func(instance)
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/urls/resolvers.py", line 588, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/utils/functional.py", line 48, in get
res = instance.dict[self.name] = self.func(instance)
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/lib/python3.8/site-packages/django/urls/resolvers.py", line 581, in urlconf_module
return import_module(self.urlconf_name)
File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/importlib/init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1014, in _gcd_import
File "", line 991, in _find_and_load
File "", line 975, in _find_and_load_unlocked
File "", line 671, in _load_unlocked
File "", line 783, in exec_module
File "", line 219, in _call_with_frames_removed
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/museum/urls.py", line 19, in
from myapp.views import *
File "/Users/mdabbas/Desktop/Museum-Management-System/museum/myapp/views.py", line 142
except Exception,e:
^
TabError: inconsistent use of tabs and spaces in indentation