diff --git a/frappe/__init__.py b/frappe/__init__.py
index 86f8be35ea..7d3de64eb7 100644
--- a/frappe/__init__.py
+++ b/frappe/__init__.py
@@ -978,8 +978,7 @@ def delete_doc(doctype=None, name=None, force=0, ignore_doctypes=None, for_reloa
 
 def delete_doc_if_exists(doctype, name, force=0):
 	"""Delete document if exists."""
-	if db.exists(doctype, name):
-		delete_doc(doctype, name, force=force)
+	delete_doc(doctype, name, force=force, ignore_missing=True)
 
 def reload_doctype(doctype, force=False, reset_permissions=False):
 	"""Reload DocType from model (`[module]/[doctype]/[name]/[name].json`) files."""
@@ -1252,9 +1251,10 @@ def get_newargs(fn, kwargs):
 	if hasattr(fn, 'fnargs'):
 		fnargs = fn.fnargs
 	else:
-		fnargs = inspect.getfullargspec(fn).args
-		fnargs.extend(inspect.getfullargspec(fn).kwonlyargs)
-		varkw = inspect.getfullargspec(fn).varkw
+		fullargspec = inspect.getfullargspec(fn)
+		fnargs = fullargspec.args
+		fnargs.extend(fullargspec.kwonlyargs)
+		varkw = fullargspec.varkw
 
 	newargs = {}
 	for a in kwargs:
diff --git a/frappe/core/doctype/communication/test_communication.py b/frappe/core/doctype/communication/test_communication.py
index d933c2f494..8012d8facf 100644
--- a/frappe/core/doctype/communication/test_communication.py
+++ b/frappe/core/doctype/communication/test_communication.py
@@ -4,8 +4,8 @@ import unittest
 from urllib.parse import quote
 
 import frappe
-from frappe.email.doctype.email_queue.email_queue import EmailQueue
 from frappe.core.doctype.communication.communication import get_emails
+from frappe.email.doctype.email_queue.email_queue import EmailQueue
 
 test_records = frappe.get_test_records('Communication')
 
@@ -202,7 +202,7 @@ class TestCommunication(unittest.TestCase):
 
 		self.assertIn(("Note", note.name), doc_links)
 
-	def parse_emails(self):
+	def test_parse_emails(self):
 		emails = get_emails(
 			[
 				'comm_recipient+DocType+DocName@example.com',
diff --git a/frappe/core/doctype/file/test_file.py b/frappe/core/doctype/file/test_file.py
index d8e748a518..fb98a18d6e 100644
--- a/frappe/core/doctype/file/test_file.py
+++ b/frappe/core/doctype/file/test_file.py
@@ -382,7 +382,7 @@ class TestFile(unittest.TestCase):
 		}).insert(ignore_permissions=True)
 
 		test_file.make_thumbnail()
-		self.assertEquals(test_file.thumbnail_url, '/files/image_small.jpg')
+		self.assertEqual(test_file.thumbnail_url, '/files/image_small.jpg')
 
 		# test web image without extension
 		test_file = frappe.get_doc({
@@ -399,7 +399,7 @@ class TestFile(unittest.TestCase):
 		test_file.reload()
 		test_file.file_url = "/files/image_small.jpg"
 		test_file.make_thumbnail(suffix="xs", crop=True)
-		self.assertEquals(test_file.thumbnail_url, '/files/image_small_xs.jpg')
+		self.assertEqual(test_file.thumbnail_url, '/files/image_small_xs.jpg')
 
 		frappe.clear_messages()
 		test_file.db_set('thumbnail_url', None)
@@ -407,7 +407,7 @@ class TestFile(unittest.TestCase):
 		test_file.file_url = frappe.utils.get_url('unknown.jpg')
 		test_file.make_thumbnail(suffix="xs")
 		self.assertEqual(json.loads(frappe.message_log[0]).get("message"), f"File '{frappe.utils.get_url('unknown.jpg')}' not found")
-		self.assertEquals(test_file.thumbnail_url, None)
+		self.assertEqual(test_file.thumbnail_url, None)
 
 	def test_file_unzip(self):
 		file_path = frappe.get_app_path('frappe', 'www/_test/assets/file.zip')
diff --git a/frappe/core/doctype/user/user.py b/frappe/core/doctype/user/user.py
index d08755f9a8..1ad977547c 100644
--- a/frappe/core/doctype/user/user.py
+++ b/frappe/core/doctype/user/user.py
@@ -253,8 +253,8 @@ class User(Document):
 				self.email_new_password(new_password)
 
 		except frappe.OutgoingEmailError:
-			print(frappe.get_traceback())
-			pass # email server not set, don't send email
+			# email server not set, don't send email
+			frappe.log_error(frappe.get_traceback())
 
 	@Document.hook
 	def validate_reset_password(self):
diff --git a/frappe/database/database.py b/frappe/database/database.py
index 1251a323d3..82a7e6f919 100644
--- a/frappe/database/database.py
+++ b/frappe/database/database.py
@@ -119,6 +119,9 @@ class Database(object):
 		if not run:
 			return query
 
+		# remove \n \t from start and end of query
+		query = re.sub(r'^\s*|\s*$', '', query)
+
 		if re.search(r'ifnull\(', query, flags=re.IGNORECASE):
 			# replaces ifnull in query with coalesce
 			query = re.sub(r'ifnull\(', 'coalesce(', query, flags=re.IGNORECASE)
@@ -384,7 +387,7 @@ class Database(object):
 		"""
 
 		ret = self.get_values(doctype, filters, fieldname, ignore, as_dict, debug,
-			order_by, cache=cache, for_update=for_update, run=run, pluck=pluck, distinct=distinct)
+			order_by, cache=cache, for_update=for_update, run=run, pluck=pluck, distinct=distinct, limit=1)
 
 		if not run:
 			return ret
@@ -393,7 +396,7 @@ class Database(object):
 
 	def get_values(self, doctype, filters=None, fieldname="name", ignore=None, as_dict=False,
 		debug=False, order_by="KEEP_DEFAULT_ORDERING", update=None, cache=False, for_update=False,
-		run=True, pluck=False, distinct=False):
+		run=True, pluck=False, distinct=False, limit=None):
 		"""Returns multiple document properties.
 
 		:param doctype: DocType name.
@@ -423,14 +426,15 @@ class Database(object):
 
 		if isinstance(filters, list):
 			out = self._get_value_for_many_names(
-				doctype,
-				filters,
-				fieldname,
-				order_by,
+				doctype=doctype,
+				names=filters,
+				field=fieldname,
+				order_by=order_by,
 				debug=debug,
 				run=run,
 				pluck=pluck,
 				distinct=distinct,
+				limit=limit,
 			)
 
 		else:
@@ -444,17 +448,18 @@ class Database(object):
 					if order_by:
 						order_by = "modified" if order_by == "KEEP_DEFAULT_ORDERING" else order_by
 					out = self._get_values_from_table(
-						fields,
-						filters,
-						doctype,
-						as_dict,
-						debug,
-						order_by,
-						update,
+						fields=fields,
+						filters=filters,
+						doctype=doctype,
+						as_dict=as_dict,
+						debug=debug,
+						order_by=order_by,
+						update=update,
 						for_update=for_update,
 						run=run,
 						pluck=pluck,
-						distinct=distinct
+						distinct=distinct,
+						limit=limit,
 					)
 				except Exception as e:
 					if ignore and (frappe.db.is_missing_column(e) or frappe.db.is_table_missing(e)):
@@ -623,6 +628,7 @@ class Database(object):
 		run=True,
 		pluck=False,
 		distinct=False,
+		limit=None,
 	):
 		field_objects = []
 
@@ -641,6 +647,7 @@ class Database(object):
 			field_objects=field_objects,
 			fields=fields,
 			distinct=distinct,
+			limit=limit,
 		)
 		if (
 			fields == "*"
@@ -654,7 +661,7 @@ class Database(object):
 		)
 		return r
 
-	def _get_value_for_many_names(self, doctype, names, field, order_by, debug=False, run=True, pluck=False, distinct=False):
+	def _get_value_for_many_names(self, doctype, names, field, order_by, debug=False, run=True, pluck=False, distinct=False, limit=None):
 		names = list(filter(None, names))
 		if names:
 			return self.get_all(
@@ -667,6 +674,7 @@ class Database(object):
 				as_list=1,
 				run=run,
 				distinct=distinct,
+				limit_page_length=limit
 			)
 		else:
 			return {}
@@ -882,27 +890,39 @@ class Database(object):
 		return self.sql("select name from `tab{doctype}` limit 1".format(doctype=doctype))
 
 	def exists(self, dt, dn=None, cache=False):
-		"""Returns true if document exists.
+		"""Return the document name of a matching document, or None.
 
-		:param dt: DocType name.
-		:param dn: Document name or filter dict."""
-		if isinstance(dt, str):
-			if dt!="DocType" and dt==dn:
-				return True # single always exists (!)
-			try:
-				return self.get_value(dt, dn, "name", cache=cache)
-			except Exception:
-				return None
+		Note: `cache` only works if `dt` and `dn` are of type `str`.
 
-		elif isinstance(dt, dict) and dt.get('doctype'):
-			try:
-				conditions = []
-				for d in dt:
-					if d == 'doctype': continue
-					conditions.append([d, '=', dt[d]])
-				return self.get_all(dt['doctype'], filters=conditions, as_list=1)
-			except Exception:
-				return None
+		## Examples
+
+		Pass doctype and docname (only in this case we can cache the result)
+
+		```
+		exists("User", "jane@example.org", cache=True)
+		```
+
+		Pass a dict of filters including the `"doctype"` key:
+
+		```
+		exists({"doctype": "User", "full_name": "Jane Doe"})
+		```
+
+		Pass the doctype and a dict of filters:
+
+		```
+		exists("User", {"full_name": "Jane Doe"})
+		```
+		"""
+		if dt != "DocType" and dt == dn:
+			# single always exists (!)
+			return dn
+
+		if isinstance(dt, dict):
+			dt = dt.copy() # don't modify the original dict
+			dt, dn = dt.pop("doctype"), dt
+
+		return self.get_value(dt, dn, ignore=True, cache=cache)
 
 	def count(self, dt, filters=None, debug=False, cache=False):
 		"""Returns `COUNT(*)` for given DocType and filters."""
diff --git a/frappe/email/doctype/auto_email_report/auto_email_report.py b/frappe/email/doctype/auto_email_report/auto_email_report.py
index 5ffde0c37b..abeb681a25 100644
--- a/frappe/email/doctype/auto_email_report/auto_email_report.py
+++ b/frappe/email/doctype/auto_email_report/auto_email_report.py
@@ -15,8 +15,6 @@ from frappe.utils.csvutils import to_csv
 from frappe.utils.xlsxutils import make_xlsx
 from frappe.desk.query_report import build_xlsx_data
 
-max_reports_per_user = frappe.local.conf.max_reports_per_user or 3
-
 
 class AutoEmailReport(Document):
 	def autoname(self):
@@ -46,6 +44,8 @@ class AutoEmailReport(Document):
 	def validate_report_count(self):
 		'''check that there are only 3 enabled reports per user'''
 		count = frappe.db.sql('select count(*) from `tabAuto Email Report` where user=%s and enabled=1', self.user)[0][0]
+		max_reports_per_user = frappe.local.conf.max_reports_per_user or 3
+
 		if count > max_reports_per_user + (-1 if self.flags.in_insert else 0):
 			frappe.throw(_('Only {0} emailed reports are allowed per user').format(max_reports_per_user))
 
diff --git a/frappe/email/doctype/notification/test_notification.py b/frappe/email/doctype/notification/test_notification.py
index f05d35be3e..f6f216ada2 100644
--- a/frappe/email/doctype/notification/test_notification.py
+++ b/frappe/email/doctype/notification/test_notification.py
@@ -240,7 +240,7 @@ class TestNotification(unittest.TestCase):
 		self.assertTrue(email_queue)
 
 		# check if description is changed after alert since set_property_after_alert is set
-		self.assertEquals(todo.description, 'Changed by Notification')
+		self.assertEqual(todo.description, 'Changed by Notification')
 
 		recipients = [d.recipient for d in email_queue.recipients]
 		self.assertTrue('test2@example.com' in recipients)
diff --git a/frappe/handler.py b/frappe/handler.py
old mode 100755
new mode 100644
index 3fd1c096e4..ebc72da937
--- a/frappe/handler.py
+++ b/frappe/handler.py
@@ -225,11 +225,10 @@ def ping():
 
 def run_doc_method(method, docs=None, dt=None, dn=None, arg=None, args=None):
 	"""run a whitelisted controller method"""
-	import json
-	import inspect
+	from inspect import getfullargspec
 
-	if not args:
-		args = arg or ""
+	if not args and arg:
+		args = arg
 
 	if dt: # not called from a doctype (from a page)
 		if not dn:
@@ -237,9 +236,7 @@ def run_doc_method(method, docs=None, dt=None, dn=None, arg=None, args=None):
 		doc = frappe.get_doc(dt, dn)
 
 	else:
-		if isinstance(docs, str):
-			docs = json.loads(docs)
-
+		docs = frappe.parse_json(docs)
 		doc = frappe.get_doc(docs)
 		doc._original_modified = doc.modified
 		doc.check_if_latest()
@@ -248,16 +245,16 @@ def run_doc_method(method, docs=None, dt=None, dn=None, arg=None, args=None):
 		throw_permission_error()
 
 	try:
-		args = json.loads(args)
+		args = frappe.parse_json(args)
 	except ValueError:
-		args = args
+		pass
 
 	method_obj = getattr(doc, method)
 	fn = getattr(method_obj, '__func__', method_obj)
 	is_whitelisted(fn)
 	is_valid_http_method(fn)
 
-	fnargs = inspect.getfullargspec(method_obj).args
+	fnargs = getfullargspec(method_obj).args
 
 	if not fnargs or (len(fnargs)==1 and fnargs[0]=="self"):
 		response = doc.run_method(method)
diff --git a/frappe/model/base_document.py b/frappe/model/base_document.py
index 3564b1ae11..57b4777355 100644
--- a/frappe/model/base_document.py
+++ b/frappe/model/base_document.py
@@ -963,7 +963,7 @@ class BaseDocument(object):
 			from frappe.model.meta import get_default_df
 			df = get_default_df(fieldname)
 
-		if not currency and df:
+		if df.fieldtype == "Currency" and not currency:
 			currency = self.get(df.get("options"))
 			if not frappe.db.exists('Currency', currency, cache=True):
 				currency = None
diff --git a/frappe/permissions.py b/frappe/permissions.py
index af17faba01..a6c17fb59f 100644
--- a/frappe/permissions.py
+++ b/frappe/permissions.py
@@ -594,4 +594,4 @@ def is_parent_valid(child_doctype, parent_doctype):
 	from frappe.core.utils import find
 	parent_meta = frappe.get_meta(parent_doctype)
 	child_table_field_exists = find(parent_meta.get_table_fields(), lambda d: d.options == child_doctype)
-	return not parent_meta.istable and child_table_field_exists
\ No newline at end of file
+	return not parent_meta.istable and child_table_field_exists
diff --git a/frappe/public/js/frappe/form/controls/attach.js b/frappe/public/js/frappe/form/controls/attach.js
index bd66225171..a91058a208 100644
--- a/frappe/public/js/frappe/form/controls/attach.js
+++ b/frappe/public/js/frappe/form/controls/attach.js
@@ -37,8 +37,8 @@ frappe.ui.form.ControlAttach = class ControlAttach extends frappe.ui.form.Contro
 		if(this.frm) {
 			me.parse_validate_and_set_in_model(null);
 			me.refresh();
-			me.frm.attachments.remove_attachment_by_filename(me.value, function() {
-				me.parse_validate_and_set_in_model(null);
+			me.frm.attachments.remove_attachment_by_filename(me.value, async () => {
+				await me.parse_validate_and_set_in_model(null);
 				me.refresh();
 				me.frm.doc.docstatus == 1 ? me.frm.save('Update') : me.frm.save();
 			});
@@ -110,9 +110,9 @@ frappe.ui.form.ControlAttach = class ControlAttach extends frappe.ui.form.Contro
 		return this.value || null;
 	}
 
-	on_upload_complete(attachment) {
+	async on_upload_complete(attachment) {
 		if(this.frm) {
-			this.parse_validate_and_set_in_model(attachment.file_url);
+			await this.parse_validate_and_set_in_model(attachment.file_url);
 			this.frm.attachments.update_attachment(attachment);
 			this.frm.doc.docstatus == 1 ? this.frm.save('Update') : this.frm.save();
 		}
diff --git a/frappe/public/js/frappe/form/footer/form_timeline.js b/frappe/public/js/frappe/form/footer/form_timeline.js
index d440874f36..0070d384d7 100644
--- a/frappe/public/js/frappe/form/footer/form_timeline.js
+++ b/frappe/public/js/frappe/form/footer/form_timeline.js
@@ -454,7 +454,10 @@ class FormTimeline extends BaseTimeline {
 		let edit_box = this.make_editable(edit_wrapper);
 		let content_wrapper = comment_wrapper.find('.content');
 		let more_actions_wrapper = comment_wrapper.find('.more-actions');
-		if (frappe.model.can_delete("Comment")) {
+		if (frappe.model.can_delete("Comment") && (
+			frappe.session.user == doc.owner ||
+			frappe.user.has_role("System Manager")
+		)) {
 			const delete_option = $(`
 				<li>
 					<a class="dropdown-item">
diff --git a/frappe/public/js/frappe/list/list_settings.js b/frappe/public/js/frappe/list/list_settings.js
index 782a077a78..186a4370bc 100644
--- a/frappe/public/js/frappe/list/list_settings.js
+++ b/frappe/public/js/frappe/list/list_settings.js
@@ -375,7 +375,7 @@ export default class ListSettings {
 		let me = this;
 
 		if (me.removed_fields) {
-			me.removed_fields.concat(fields);
+			me.removed_fields = me.removed_fields.concat(fields);
 		} else {
 			me.removed_fields = fields;
 		}
diff --git a/frappe/public/js/frappe/ui/page.js b/frappe/public/js/frappe/ui/page.js
index 91a2390cdb..e3134b1f38 100644
--- a/frappe/public/js/frappe/ui/page.js
+++ b/frappe/public/js/frappe/ui/page.js
@@ -47,13 +47,17 @@ frappe.ui.Page = class Page {
 	}
 
 	setup_scroll_handler() {
-		window.addEventListener('scroll', () => {
-			if (document.documentElement.scrollTop) {
-				$('.page-head').toggleClass('drop-shadow', true);
+		let last_scroll = 0;
+		window.addEventListener('scroll', frappe.utils.throttle(() => {
+			$('.page-head').toggleClass('drop-shadow', !!document.documentElement.scrollTop);
+			let current_scroll = document.documentElement.scrollTop;
+			if (current_scroll > 0 && last_scroll <= current_scroll) {
+				$('.page-head').css("top", "-15px");
 			} else {
-				$('.page-head').removeClass('drop-shadow');
+				$('.page-head').css("top", "var(--navbar-height)");
 			}
-		});
+			last_scroll = current_scroll;
+		}), 500);
 	}
 
 	get_empty_state(title, message, primary_action) {
diff --git a/frappe/public/js/frappe/utils/utils.js b/frappe/public/js/frappe/utils/utils.js
index a944af523d..0514576380 100644
--- a/frappe/public/js/frappe/utils/utils.js
+++ b/frappe/public/js/frappe/utils/utils.js
@@ -231,7 +231,7 @@ Object.assign(frappe.utils, {
 			if (tt && (tt.substr(0, 1)===">" || tt.substr(0, 4)==="&gt;")) {
 				part.push(t);
 			} else {
-				out.concat(part);
+				out = out.concat(part);
 				out.push(t);
 				part = [];
 			}
diff --git a/frappe/public/js/frappe/views/reports/report_view.js b/frappe/public/js/frappe/views/reports/report_view.js
index f80d59350f..2747a2723d 100644
--- a/frappe/public/js/frappe/views/reports/report_view.js
+++ b/frappe/public/js/frappe/views/reports/report_view.js
@@ -1026,7 +1026,7 @@ frappe.views.ReportView = class ReportView extends frappe.views.ListView {
 		}
 		if (!docfield || docfield.report_hide) return;
 
-		let title = __(docfield ? docfield.label : toTitle(fieldname));
+		let title = __(docfield.label);
 		if (doctype !== this.doctype) {
 			title += ` (${__(doctype)})`;
 		}
diff --git a/frappe/public/js/frappe/web_form/web_form_list.js b/frappe/public/js/frappe/web_form/web_form_list.js
index f4d41c2a0b..1ad332e3c2 100644
--- a/frappe/public/js/frappe/web_form/web_form_list.js
+++ b/frappe/public/js/frappe/web_form/web_form_list.js
@@ -16,7 +16,8 @@ export default class WebFormList {
 		if (this.table) {
 			Array.from(this.table.tBodies).forEach(tbody => tbody.remove());
 			let check = document.getElementById('select-all');
-			check.checked = false;
+			if (check)
+				check.checked = false;
 		}
 		this.rows = [];
 		this.page_length = 20;
@@ -131,9 +132,39 @@ export default class WebFormList {
 			this.make_table_head();
 		}
 
-		this.append_rows(this.data);
-
-		this.wrapper.appendChild(this.table);
+		if (this.data.length) {
+			this.append_rows(this.data);
+			this.wrapper.appendChild(this.table);
+		} else {
+			let new_button = "";
+			let empty_state = document.createElement("div");
+			empty_state.classList.add("no-result", "text-muted", "flex", "justify-center", "align-center");
+
+			frappe.has_permission(this.doctype, "", "create", () => {
+				new_button = `
+					<a
+						class="btn btn-primary btn-sm btn-new-doc hidden-xs"
+						href="${window.location.pathname}?new=1">
+						${__("Create a new {0}", [__(this.doctype)])}
+					</a>
+				`;
+
+				empty_state.innerHTML = `
+					<div class="text-center">
+						<div>
+							<img
+								src="/assets/frappe/images/ui-states/list-empty-state.svg"
+								alt="Generic Empty State"
+								class="null-state">
+						</div>
+						<p class="small mb-2">${__("No {0} found", [__(this.doctype)])}</p>
+						${new_button}
+					</div>
+				`;
+
+				this.wrapper.appendChild(empty_state);
+			});
+		}
 	}
 
 	make_table_head() {
@@ -212,8 +243,7 @@ export default class WebFormList {
 				"btn",
 				"btn-secondary",
 				"btn-sm",
-				"ml-2",
-				"text-white"
+				"ml-2"
 			);
 		}
 		else if (type == "danger") {
diff --git a/frappe/public/scss/desk/page.scss b/frappe/public/scss/desk/page.scss
index f0a9152cfb..2df349cb6c 100644
--- a/frappe/public/scss/desk/page.scss
+++ b/frappe/public/scss/desk/page.scss
@@ -88,6 +88,7 @@
 	top: var(--navbar-height);
 	background: var(--bg-color);
 	margin-bottom: 5px;
+	transition: 0.5s top;
 	.page-head-content {
 		height: var(--page-head-height);
 	}
diff --git a/frappe/public/scss/website/index.scss b/frappe/public/scss/website/index.scss
index 2cc0f64f76..e36e649eb7 100644
--- a/frappe/public/scss/website/index.scss
+++ b/frappe/public/scss/website/index.scss
@@ -311,3 +311,16 @@ h5.modal-title {
 .empty-list-icon {
 	height: 70px;
 }
+
+.null-state {
+	height: 60px;
+	width: auto;
+	margin-bottom: var(--margin-md);
+	img {
+		fill: var(--fg-color);
+	}
+}
+
+.no-result {
+	min-height: #{"calc(100vh - 284px)"};
+}
diff --git a/frappe/tests/test_base_document.py b/frappe/tests/test_base_document.py
index 7e165e9045..fda795b5b6 100644
--- a/frappe/tests/test_base_document.py
+++ b/frappe/tests/test_base_document.py
@@ -7,12 +7,12 @@ class TestBaseDocument(unittest.TestCase):
 	def test_docstatus(self):
 		doc = BaseDocument({"docstatus": 0})
 		self.assertTrue(doc.docstatus.is_draft())
-		self.assertEquals(doc.docstatus, 0)
+		self.assertEqual(doc.docstatus, 0)
 
 		doc.docstatus = 1
 		self.assertTrue(doc.docstatus.is_submitted())
-		self.assertEquals(doc.docstatus, 1)
+		self.assertEqual(doc.docstatus, 1)
 
 		doc.docstatus = 2
 		self.assertTrue(doc.docstatus.is_cancelled())
-		self.assertEquals(doc.docstatus, 2)
+		self.assertEqual(doc.docstatus, 2)
diff --git a/frappe/tests/test_db.py b/frappe/tests/test_db.py
index ab85f28af3..10c601db00 100644
--- a/frappe/tests/test_db.py
+++ b/frappe/tests/test_db.py
@@ -14,7 +14,7 @@ from frappe.database.database import Database
 from frappe.query_builder import Field
 from frappe.query_builder.functions import Concat_ws
 from frappe.tests.test_query_builder import db_type_is, run_only_if
-from frappe.utils import add_days, now, random_string
+from frappe.utils import add_days, now, random_string, cint
 from frappe.utils.testutils import clear_custom_fields
 
 
@@ -84,6 +84,27 @@ class TestDB(unittest.TestCase):
 			),
 		)
 
+	def test_get_value_limits(self):
+
+		# check both dict and list style filters
+		filters = [{"enabled": 1}, [["enabled", "=", 1]]]
+		for filter in filters:
+			self.assertEqual(1, len(frappe.db.get_values("User", filters=filter, limit=1)))
+			# count of last touched rows as per DB-API 2.0 https://peps.python.org/pep-0249/#rowcount
+			self.assertGreaterEqual(1, cint(frappe.db._cursor.rowcount))
+			self.assertEqual(2, len(frappe.db.get_values("User", filters=filter, limit=2)))
+			self.assertGreaterEqual(2, cint(frappe.db._cursor.rowcount))
+
+			# without limits length == count
+			self.assertEqual(len(frappe.db.get_values("User", filters=filter)),
+					frappe.db.count("User", filter))
+
+			frappe.db.get_value("User", filters=filter)
+			self.assertGreaterEqual(1, cint(frappe.db._cursor.rowcount))
+
+			frappe.db.exists("User", filter)
+			self.assertGreaterEqual(1, cint(frappe.db._cursor.rowcount))
+
 	def test_escape(self):
 		frappe.db.escape("香港濟生堂製藥有限公司 - IT".encode("utf-8"))
 
@@ -301,6 +322,20 @@ class TestDB(unittest.TestCase):
 			# recover transaction to continue other tests
 			raise Exception
 
+	def test_exists(self):
+		dt, dn = "User", "Administrator"
+		self.assertEqual(frappe.db.exists(dt, dn, cache=True), dn)
+		self.assertEqual(frappe.db.exists(dt, dn), dn)
+		self.assertEqual(frappe.db.exists(dt, {"name": ("=", dn)}), dn)
+
+		filters = {"doctype": dt, "name": ("like", "Admin%")}
+		self.assertEqual(frappe.db.exists(filters), dn)
+		self.assertEqual(
+			filters["doctype"], dt
+		)  # make sure that doctype was not removed from filters
+
+		self.assertEqual(frappe.db.exists(dt, [["name", "=", dn]]), dn)
+
 
 @run_only_if(db_type_is.MARIADB)
 class TestDDLCommandsMaria(unittest.TestCase):
@@ -357,7 +392,7 @@ class TestDDLCommandsMaria(unittest.TestCase):
 			WHERE Key_name = '{index_name}';
 			"""
 		)
-		self.assertEquals(len(indexs_in_table), 2)
+		self.assertEqual(len(indexs_in_table), 2)
 
 
 class TestDBSetValue(unittest.TestCase):
@@ -561,7 +596,7 @@ class TestDDLCommandsPost(unittest.TestCase):
 			AND indexname = '{index_name}' ;
 			""",
 		)
-		self.assertEquals(len(indexs_in_table), 1)
+		self.assertEqual(len(indexs_in_table), 1)
 
 	@run_only_if(db_type_is.POSTGRES)
 	def test_modify_query(self):
diff --git a/frappe/tests/test_document.py b/frappe/tests/test_document.py
index 55dbf001f9..169d1ebb2c 100644
--- a/frappe/tests/test_document.py
+++ b/frappe/tests/test_document.py
@@ -260,15 +260,15 @@ class TestDocument(unittest.TestCase):
 			'doctype': 'Test Formatted',
 			'currency': 100000
 		})
-		self.assertEquals(d.get_formatted('currency', currency='INR', format="#,###.##"), '₹ 100,000.00')
+		self.assertEqual(d.get_formatted('currency', currency='INR', format="#,###.##"), '₹ 100,000.00')
 
 	def test_limit_for_get(self):
 		doc = frappe.get_doc("DocType", "DocType")
 		# assuming DocType has more than 3 Data fields
-		self.assertEquals(len(doc.get("fields", limit=3)), 3)
+		self.assertEqual(len(doc.get("fields", limit=3)), 3)
 
 		# limit with filters
-		self.assertEquals(len(doc.get("fields", filters={"fieldtype": "Data"}, limit=3)), 3)
+		self.assertEqual(len(doc.get("fields", filters={"fieldtype": "Data"}, limit=3)), 3)
 
 	def test_virtual_fields(self):
 		"""Virtual fields are accessible via API and Form views, whenever .as_dict is invoked
diff --git a/frappe/tests/test_search.py b/frappe/tests/test_search.py
index f644f2dfcc..38a00f689a 100644
--- a/frappe/tests/test_search.py
+++ b/frappe/tests/test_search.py
@@ -70,10 +70,10 @@ class TestSearch(unittest.TestCase):
 		result = frappe.response['results']
 
 		# Check whether the result is sorted or not
-		self.assertEquals(self.parent_doctype_name, result[0]['value'])
+		self.assertEqual(self.parent_doctype_name, result[0]['value'])
 
 		# Check whether searching for parent also list out children
-		self.assertEquals(len(result), len(self.child_doctypes_names) + 1)
+		self.assertEqual(len(result), len(self.child_doctypes_names) + 1)
 
 	#Search for the word "pay", part of the word "pays" (country) in french.
 	def test_link_search_in_foreign_language(self):
diff --git a/frappe/translate.py b/frappe/translate.py
index 292adc71c7..0367d33d3b 100644
--- a/frappe/translate.py
+++ b/frappe/translate.py
@@ -650,8 +650,6 @@ def extract_messages_from_code(code):
 		if isinstance(e, InvalidIncludePath):
 			frappe.clear_last_message()
 
-		pass
-
 	messages = []
 	pattern = r"_\(([\"']{,3})(?P<message>((?!\1).)*)\1(\s*,\s*context\s*=\s*([\"'])(?P<py_context>((?!\5).)*)\5)*(\s*,\s*(.)*?\s*(,\s*([\"'])(?P<js_context>((?!\11).)*)\11)*)*\)"
 
diff --git a/frappe/utils/backups.py b/frappe/utils/backups.py
index 3a0c337042..5197b20bd3 100644
--- a/frappe/utils/backups.py
+++ b/frappe/utils/backups.py
@@ -15,7 +15,7 @@ import click
 
 # imports - module imports
 import frappe
-from frappe import _, conf
+from frappe import conf
 from frappe.utils import get_file_size, get_url, now, now_datetime, cint
 from frappe.utils.password import get_encryption_key
 
@@ -505,7 +505,7 @@ download only after 24 hours.""" % {
 			datetime_str.strftime("%d/%m/%Y %H:%M:%S") + """ - Backup ready to be downloaded"""
 		)
 
-		frappe.sendmail(recipients=recipient_list, msg=msg, subject=subject)
+		frappe.sendmail(recipients=recipient_list, message=msg, subject=subject)
 		return recipient_list
 
 
@@ -779,7 +779,7 @@ if __name__ == "__main__":
 			db_type=db_type,
 			db_port=db_port,
 		)
-		odb.send_email("abc.sql.gz")
+		odb.send_email()
 
 	if cmd == "delete_temp_backups":
 		delete_temp_backups()
diff --git a/frappe/utils/nestedset.py b/frappe/utils/nestedset.py
index 98ad337043..2517761c45 100644
--- a/frappe/utils/nestedset.py
+++ b/frappe/utils/nestedset.py
@@ -227,7 +227,6 @@ class NestedSet(Document):
 			update_nsm(self)
 		except frappe.DoesNotExistError:
 			if self.flags.on_rollback:
-				pass
 				frappe.message_log.pop()
 			else:
 				raise