From 6d9d4af1921e63e937b7426736a3ce1751af4c68 Mon Sep 17 00:00:00 2001
From: Melon Mouse <73140350+melonmouse@users.noreply.github.com>
Date: Fri, 16 Sep 2022 10:48:37 +0200
Subject: [PATCH 1/4] Add inverse mappings for exif tags.

A nicer solution would be to switch to an enum with the right values, but this is the quick win.
---
 src/PIL/ExifTags.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/PIL/ExifTags.py b/src/PIL/ExifTags.py
index 7da2ddae5a7..15e8010b6f2 100644
--- a/src/PIL/ExifTags.py
+++ b/src/PIL/ExifTags.py
@@ -293,6 +293,11 @@
 }
 """Maps EXIF tags to tag names."""
 
+TAG_CODES = {
+    # possibly incomplete
+    tag_name: tag_code for tag_code, tag_name in TAGS.items()
+}
+"""Maps tag names to EXIF tags."""
 
 GPSTAGS = {
     0: "GPSVersionID",
@@ -329,3 +334,6 @@
     31: "GPSHPositioningError",
 }
 """Maps EXIF GPS tags to tag names."""
+
+GPS_CODES = {gps_name: gps_code for gps_code, gps_name in GPSTAGS.items()}
+"""Maps tag names to EXIF GPS tags."""

From ce905dea74387b1e369b323acc183f6e1bdb3506 Mon Sep 17 00:00:00 2001
From: Melon Mouse <73140350+melonmouse@users.noreply.github.com>
Date: Fri, 16 Sep 2022 10:56:45 +0200
Subject: [PATCH 2/4] Add include inverse mappings to ExifTags docs.

---
 docs/reference/ExifTags.rst | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/docs/reference/ExifTags.rst b/docs/reference/ExifTags.rst
index 4567d4d3e79..e2241dc2f9e 100644
--- a/docs/reference/ExifTags.rst
+++ b/docs/reference/ExifTags.rst
@@ -4,25 +4,45 @@
 :py:mod:`~PIL.ExifTags` Module
 ==============================
 
-The :py:mod:`~PIL.ExifTags` module exposes two dictionaries which
+The :py:mod:`~PIL.ExifTags` module exposes four dictionaries which
 provide constants and clear-text names for various well-known EXIF tags.
 
 .. py:data:: TAGS
     :type: dict
 
-    The TAG dictionary maps 16-bit integer EXIF tag enumerations to
-    descriptive string names.  For instance:
+    The TAGS dictionary maps 16-bit integer EXIF tag enumerations to
+    descriptive string names. For instance:
 
         >>> from PIL.ExifTags import TAGS
         >>> TAGS[0x010e]
         'ImageDescription'
+        
+.. py:data:: TAG_CODES
+    :type: dict
+
+    The TAG_CODES dictionary maps descriptive string names to 16-bit integer EXIF
+    tag enumerations. For instance:
+
+        >>> from PIL.ExifTags import TAG_CODES
+        >>> TAG_CODES['ImageDescription']
+        0x010e
 
 .. py:data:: GPSTAGS
     :type: dict
 
     The GPSTAGS dictionary maps 8-bit integer EXIF gps enumerations to
-    descriptive string names.  For instance:
+    descriptive string names. For instance:
 
         >>> from PIL.ExifTags import GPSTAGS
         >>> GPSTAGS[20]
         'GPSDestLatitude'
+        
+.. py:data:: GPS_CODES
+    :type: dict
+
+    The GPS_CODES dictionary maps descriptive string names to 8-bit integer EXIF
+    gps enumerations. For instance:
+
+        >>> from PIL.ExifTags import GPSTAGS
+        >>> GPS_CODES['GPSDestLatitude']
+        20

From 50bbf11c02017fae577fca3cbd0f65465c48466a Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Fri, 16 Sep 2022 09:01:35 +0000
Subject: [PATCH 3/4] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 src/PIL/ExifTags.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/PIL/ExifTags.py b/src/PIL/ExifTags.py
index 15e8010b6f2..925cafbe3b7 100644
--- a/src/PIL/ExifTags.py
+++ b/src/PIL/ExifTags.py
@@ -295,7 +295,8 @@
 
 TAG_CODES = {
     # possibly incomplete
-    tag_name: tag_code for tag_code, tag_name in TAGS.items()
+    tag_name: tag_code
+    for tag_code, tag_name in TAGS.items()
 }
 """Maps tag names to EXIF tags."""
 

From 793fb76b611ad59792399cccf8eb638c6c3cc18f Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Fri, 16 Sep 2022 19:12:46 +1000
Subject: [PATCH 4/4] Removed trailing whitespace

---
 docs/reference/ExifTags.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/reference/ExifTags.rst b/docs/reference/ExifTags.rst
index e2241dc2f9e..5827757f435 100644
--- a/docs/reference/ExifTags.rst
+++ b/docs/reference/ExifTags.rst
@@ -16,7 +16,7 @@ provide constants and clear-text names for various well-known EXIF tags.
         >>> from PIL.ExifTags import TAGS
         >>> TAGS[0x010e]
         'ImageDescription'
-        
+
 .. py:data:: TAG_CODES
     :type: dict
 
@@ -36,7 +36,7 @@ provide constants and clear-text names for various well-known EXIF tags.
         >>> from PIL.ExifTags import GPSTAGS
         >>> GPSTAGS[20]
         'GPSDestLatitude'
-        
+
 .. py:data:: GPS_CODES
     :type: dict