python: Sort imports with isort.

Fixes #2665.

Regenerated by tabbott with `lint --fix` after a rebase and change in
parameters.

Note from tabbott: In a few cases, this converts technical debt in the
form of unsorted imports into different technical debt in the form of
our largest files having very long, ugly import sequences at the
start.  I expect this change will increase pressure for us to split
those files, which isn't a bad thing.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

tools/setup/build_pygments_data

@@ -1,9 +1,9 @@
 #!/usr/bin/env python3
-
-from pygments.lexers import get_all_lexers
 import json
 import os
 
+from pygments.lexers import get_all_lexers
+
 ZULIP_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), '../../')
 DATA_PATH = os.path.join(ZULIP_PATH, 'tools', 'setup', 'lang.json')
 OUT_PATH = os.path.join(ZULIP_PATH, 'static', 'generated', 'pygments_data.json')

tools/setup/emoji/build_emoji

@@ -5,14 +5,20 @@
 import os
 import shutil
 import sys
-import ujson
-
 from typing import Any, Dict, Iterator, List, Optional
 
-from emoji_setup_utils import generate_emoji_catalog, generate_codepoint_to_name_map, \
-    get_emoji_code, generate_name_to_codepoint_map, emoji_names_for_picker, \
-    EMOTICON_CONVERSIONS, REMAPPED_EMOJIS
+import ujson
+
 from emoji_names import EMOJI_NAME_MAPS
+from emoji_setup_utils import (
+    EMOTICON_CONVERSIONS,
+    REMAPPED_EMOJIS,
+    emoji_names_for_picker,
+    generate_codepoint_to_name_map,
+    generate_emoji_catalog,
+    generate_name_to_codepoint_map,
+    get_emoji_code,
+)
 
 ZULIP_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), '../../../')
 sys.path.append(ZULIP_PATH)

tools/setup/emoji/emoji_setup_utils.py

@@ -1,8 +1,6 @@
 # This file contains various helper functions used by `build_emoji` tool.
 # See docs/subsystems/emoji.md for details on how this system works.
-
 from collections import defaultdict
-
 from typing import Any, Dict, List
 
 # Emojisets that we currently support.

tools/setup/emoji/export_emoji_names_to_csv

@@ -10,12 +10,12 @@ import argparse
 import csv
 import os
 import re
+from typing import Any, Dict, List
+
 import ujson
 
 from emoji_setup_utils import get_emoji_code
 
-from typing import Any, Dict, List
-
 TOOLS_DIR_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 ZULIP_PATH = os.path.dirname(TOOLS_DIR_PATH)
 # `emoji.json` file is same in all four emoji-datasource packages.

tools/setup/emoji/generate_emoji_names_table

@@ -6,12 +6,12 @@
 # sources' decisions about what names to provide to each unicode
 # codepoint.
 import os
-import ujson
-
 from typing import Any, Dict, List
 
-from emoji_setup_utils import emoji_is_universal, get_emoji_code, EMOJISETS
+import ujson
+
 from emoji_names import EMOJI_NAME_MAPS
+from emoji_setup_utils import EMOJISETS, emoji_is_universal, get_emoji_code
 
 TOOLS_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 ZULIP_PATH = os.path.dirname(TOOLS_DIR)

tools/setup/emoji/import_emoji_names_from_csv

@@ -13,7 +13,6 @@ import csv
 import os
 import re
 import textwrap
-
 from typing import Any, Dict, List, Set
 
 EMOJI_DIR_PATH = os.path.dirname(os.path.abspath(__file__))

tools/setup/emoji/test-emoji-name-scripts

@@ -3,8 +3,8 @@ import argparse
 import difflib
 import filecmp
 import os
-import subprocess
 import shutil
+import subprocess
 import tempfile
 
 TOOLS_DIR = os.path.abspath(os.path.dirname(os.path.dirname(os.path.dirname(__file__))))

tools/setup/generate_integration_bots_avatars.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-
 import os
 import sys
 
@@ -7,6 +6,7 @@ ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__f
 if ZULIP_PATH not in sys.path:
     sys.path.append(ZULIP_PATH)
 from scripts.lib.setup_path import setup_path
+
 setup_path()
 
 os.environ["DJANGO_SETTINGS_MODULE"] = "zproject.settings"
@@ -20,9 +20,10 @@ import io
 import cairosvg
 from PIL import Image
 
-from zerver.lib.upload import resize_avatar, DEFAULT_AVATAR_SIZE
 from zerver.lib.integrations import WEBHOOK_INTEGRATIONS
 from zerver.lib.storage import static_path
+from zerver.lib.upload import DEFAULT_AVATAR_SIZE, resize_avatar
+
 
 def create_square_image(png: bytes) -> bytes:
     img = Image.open(io.BytesIO(png))

tools/setup/generate_zulip_bots_static_files.py

@@ -1,19 +1,20 @@
 #!/usr/bin/env python3
-
 import glob
 import os
-import sys
 import shutil
+import sys
 from typing import List
 
 ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 if ZULIP_PATH not in sys.path:
     sys.path.append(ZULIP_PATH)
 from scripts.lib.setup_path import setup_path
+
 setup_path()
 
 from zulip_bots.lib import get_bots_directory_path
 
+
 def generate_zulip_bots_static_files() -> None:
     bots_dir = 'static/generated/bots'
     if os.path.isdir(bots_dir):