debug wip

Author: azmeuk

src/wtforms/fields/datetime.py

@@ -34,7 +34,8 @@ def __init__(
     def _value(self):
         if self.raw_data:
             return " ".join(self.raw_data)
-        return self.data and self.data.strftime(self.format[0]) or ""
+        format = self.format[0]
+        return self.data and self.data.strftime(format) or ""
 
     def process_formdata(self, valuelist):
         if not valuelist:

src/wtforms/utils.py

@@ -1,8 +1,11 @@
+import os
 import re
 
+_LEADING_SYMBOL = "#" if os.name == "nt" else "-"
+
 # https://docs.python.org/3/library/datetime.html#technical-detail (see NOTE #9)
 _DATETIME_STRIP_ZERO_PADDING_FORMATS_RE = re.compile(
-    "%-["
+    f"%{_LEADING_SYMBOL}["
     "d"  # day of month
     "m"  # month
     "H"  # hour (24-hour)
@@ -25,7 +28,7 @@ def clean_datetime_format_for_strptime(formats):
     return [
         re.sub(
             _DATETIME_STRIP_ZERO_PADDING_FORMATS_RE,
-            lambda m: m[0].replace("-", ""),
+            lambda m: m[0].replace(_LEADING_SYMBOL, ""),
             format,
         )
         for format in formats

tox.ini

@@ -11,7 +11,7 @@ deps =
     babel
     email_validator
 commands =
-    pytest --tb=short --basetemp={envtmpdir} {posargs}
+    pytest --tb=short -l --basetemp={envtmpdir} {posargs}
 
 [testenv:coverage]
 deps =