Dont import lxml at top level of module

src/calibre/devices/kobo/driver.py

@@ -30,7 +30,6 @@ from calibre.devices.usbms.driver import USBMS
 from calibre.ebooks import DRMError
 from calibre.ebooks.metadata import authors_to_string
 from calibre.ebooks.metadata.book.base import Metadata
-from calibre.ebooks.metadata.utils import normalize_languages
 from calibre.prints import debug_print
 from calibre.ptempfile import PersistentTemporaryFile, TemporaryDirectory, better_mktemp
 from calibre.utils.config_base import prefs
@@ -3385,6 +3384,7 @@ class KOBOTOUCH(KOBO):
             debug_print('KoboTouch:set_series - end')
 
     def set_core_metadata(self, connection, book, series_only=False):
+        from calibre.ebooks.metadata.utils import normalize_languages
         # debug_print('KoboTouch:set_core_metadata book="%s"' % book.title)
         show_debug = self.is_debugging_title(book.title)
         if show_debug:

src/calibre/ebooks/metadata/sources/amazon.py

@@ -27,7 +27,6 @@ from calibre import as_unicode, browser, random_user_agent, xml_replace_entities
 from calibre.ebooks.metadata import check_isbn
 from calibre.ebooks.metadata.book.base import Metadata
 from calibre.ebooks.metadata.sources.base import Option, Source, fixauthors, fixcase
-from calibre.ebooks.oeb.base import urlquote
 from calibre.utils.icu import lower as icu_lower
 from calibre.utils.localization import canonicalize_lang
 from calibre.utils.random_ua import accept_header_for_ua
@@ -51,6 +50,7 @@ def sort_matches_preferring_kindle_editions(matches):
 
 
 def iri_quote_plus(url):
+    from calibre.ebooks.oeb.base import urlquote
     ans = urlquote(url)
     if isinstance(ans, bytes):
         ans = ans.decode('utf-8')

src/calibre/utils/formatter_functions.py

@@ -22,12 +22,9 @@ from enum import Enum, auto
 from functools import partial
 from math import ceil, floor, modf, trunc
 
-from lxml import html
-
 from calibre import human_readable, prepare_string_for_xml, prints
 from calibre.constants import DEBUG
 from calibre.db.constants import DATA_DIR_NAME, DATA_FILE_PATTERN
-from calibre.db.notes.exim import expand_note_resources, parse_html
 from calibre.ebooks.metadata import title_sort
 from calibre.ebooks.metadata.book.base import field_metadata
 from calibre.ebooks.metadata.search_internet import qquote
@@ -3095,6 +3092,9 @@ This function works only in the GUI and the content server.
                     if plain_text == '1':
                         note = note['searchable_text'].partition('\n')[2]
                     else:
+                        from lxml import html
+
+                        from calibre.db.notes.exim import expand_note_resources, parse_html
                         # Return the full HTML of the note, including all images
                         # as data: URLs. Reason: non-exported note html contains
                         # "calres://" URLs for images. These images won't render