v3.1.4. Fix bug with dates supplied as strings & CI test all encodings

README.md

@@ -8,8 +8,8 @@ The Python Shapefile Library (PyShp) reads and writes ESRI Shapefiles in pure Py
 
 - **Author**: [Joel Lawhead](https://github.com/GeospatialPython)
 - **Maintainers**: [James Parrott](https://github.com/JamesParrott) & [Karim Bahgat](https://github.com/karimbahgat)
-- **Version**: 3.1.4.dev
-- **Date**: 27th June 2026
+- **Version**: 3.1.4
+- **Date**: 29th June 2026
 - **License**: [MIT](https://github.com/GeospatialPython/pyshp/blob/master/LICENSE.TXT)
 
 ## Contents
@@ -93,9 +93,14 @@ part of your geospatial project.
 
 # Version Changes
 
-## 3.1.4.dev
+## 3.1.4
+### Bug fix
+ - Fix bug causing dates supplied as length 8 strings of digits to be encoded by the custom encoding, not ascii.
+
 ### Testing
- - Test other codecs (ascii and unicode so far).
+ - Test other codecs (ascii and UTF-8, UTF-16 & UTF-32 so far).
+ - Test all available codecs in CI (92 of them).
+
 ## 3.1.3
  - Restore faster text writing paths for single-byte Ascii encodings, and Utf-8.
 

changelog.txt

@@ -1,8 +1,10 @@
 
-VERSION 3.1.4.dev
-
+VERSION 3.1.4
+2026-06-29
+	* Fix bug causing dates supplied as length 8 strings to be encoded by the custom codec, not ascii
 2026-06-27
-	* Test other codecs (ascii and unicode so far).
+	* Test other codecs (ascii and UTF-8, UTF-16 & UTF-32 so far).
+	* Test all other codecs in CI
 
 VERSION 3.1.3
 

src/shapefile.py

@@ -8,7 +8,7 @@
 
 from __future__ import annotations
 
-__version__ = "3.1.4.dev"
+__version__ = "3.1.4"
 
 import abc
 import array
@@ -4436,7 +4436,7 @@ def _record(self, record: list[RecordValue]) -> None:
                 elif value in MISSING:
                     str_val = "0" * 8  # QGIS NULL for date type
                 elif isinstance(value, str) and len(value) == 8:
-                    pass  # value is already a date string
+                    str_val = value
                 else:
                     raise ShapefileException(
                         f"Could not read as date: {value}. "

tests/hypothesis_tests.py

@@ -4,6 +4,7 @@
 import datetime
 import io
 import itertools
+import os
 import string
 import warnings
 
@@ -27,6 +28,8 @@
 
 import shapefile as shp
 
+IN_CI = bool(os.getenv("CI") or os.getenv("GITHUB_ACTIONS"))
+
 @contextlib.contextmanager
 def ignore_warnings(category=None):
     with warnings.catch_warnings():
@@ -551,52 +554,39 @@ def test_shx_reader_writer_roundtrip(codes_and_shapes)-> None:
 }
 
 
-ENCODINGS = [
+ENCODINGS  = [
     "ascii",
     "latin1",
     "utf-8",
     "utf-16-be",
     "utf-16-le",
-    "utf-16",
-    "utf-32-be",
     "utf-32-le",
-    "cp1252",
-    "cp1254",
-    "cp932",
-    "euc_kr",
-    "euc_jp",
-    "mac_iceland",
-    "cp932",
-    "shift_jis",
-    "iso8859_5",
-    "koi8_r",
-    "gbk",
-    "gb18030",
-    "big5",
+    "cp1140",
 ]
-encodings = sampled_from(ENCODINGS)
-
-# from encodings.aliases import aliases
-# encs = set()
-# for enc in aliases.values():
-#     if enc in encs:
-#         continue
-#     try:
-#         "".encode(enc)
-#     except UnicodeEncodeError, LookupError:
-#         continue
-#     encs.add(enc)
-# assert encs == ['utf_16_le', 'iso8859_7', 'cp437', 'iso2022_jp_3', 'shift_jis', 'cp775', 'cp1140',
+
+def _encodings() -> set[str]:
+    from encodings.aliases import aliases
+    encs = set()
+    for enc in aliases.values():
+        if enc in encs:
+            continue
+        try:
+            "".encode(enc)
+        except (UnicodeEncodeError, LookupError):
+            continue
+        encs.add(enc)
+    return encs
+# assert _encodings() == {'utf_16_le', 'iso8859_7', 'cp437', 'iso2022_jp_3', 'shift_jis', 'cp775', 'cp1140',
 # 'cp861', 'iso8859_11', 'iso8859_9', 'euc_jp', 'utf_16', 'cp950', 'mac_cyrillic', 'mac_turkish', 'iso2022_jp_1', 'iso8859_10',
 # 'iso2022_jp_2004', 'cp866', 'mac_greek', 'hz', 'cp1257', 'cp037', 'cp863', 'iso8859_4', 'utf_16_be', 'gb18030', 'cp1250',
 # 'cp850', 'iso8859_5', 'shift_jisx0213', 'iso8859_8', 'cp273', 'euc_jisx0213', 'cp932', 'cp862', 'tis_620', 'cp1125', 'koi8_r',
 # 'cp874', 'cp1026', 'cp1252', 'cp858', 'cp865', 'gb2312', 'iso8859_15', 'cp857', 'cp860', 'iso2022_jp', 'iso2022_jp_ext',
 # 'ascii', 'cp1254', 'cp424', 'cp855', 'hp_roman8', 'mac_latin2', 'euc_jis_2004', 'euc_kr', 'cp1256', 'shift_jis_2004',
 # 'utf_32_le', 'gbk', 'cp869', 'iso8859_13', 'iso8859_3', 'big5', 'cp1258', 'cp1253', 'latin_1', 'cp864', 'utf_8',
 # 'iso2022_kr', 'cp1251', 'cp1255', 'mac_iceland', 'kz1048', 'iso8859_14', 'utf_32_be', 'ptcp154', 'iso8859_6', 'mac_roman',
-# 'utf_32', 'iso2022_jp_2', 'iso8859_16', 'mbcs', 'cp500', 'iso8859_2', 'cp949', 'cp852', 'utf_7', 'big5hkscs', 'johab']
+# 'utf_32', 'iso2022_jp_2', 'iso8859_16', 'mbcs', 'cp500', 'iso8859_2', 'cp949', 'cp852', 'utf_7', 'big5hkscs', 'johab'}
 
-# encodings = sampled_from(list(encs))
+encodings = sampled_from(list(_encodings())) # if IN_CI else ENCODINGS)
 
 
 @composite