more relative imports

_identifier exports a compiled regex instead of a string to avoid some
tricky cleanup

1 files changed, 7 insertions, 4 deletions

diff --git a/scripts/generate_identifier_pattern.py b/scripts/generate_identifier_pattern.py
index 845a441..5813199 100755
--- a/scripts/generate_identifier_pattern.py
+++ b/scripts/generate_identifier_pattern.py
@@ -58,17 +58,20 @@ def build_pattern(ranges):
 
 
 def main():
-    """Build the regex pattern and write it to the file
-    :file:`jinja2/_identifier.py`."""
+    """Build the regex pattern and write it to
+    ``jinja2/_identifier.py``.
+    """
     pattern = build_pattern(collapse_ranges(get_characters()))
     filename = os.path.abspath(
         os.path.join(os.path.dirname(__file__), "..", "src", "jinja2", "_identifier.py")
     )
 
     with open(filename, "w", encoding="utf8") as f:
-        f.write("")
+        f.write("import re\n\n")
         f.write("# generated by scripts/generate_identifier_pattern.py\n")
-        f.write('pattern = "{}"  # noqa: B950\n'.format(pattern))
+        f.write("pattern = re.compile(\n")
+        f.write('    r"[\\w{}]+"  # noqa: B950\n'.format(pattern))
+        f.write(")\n")
 
 
 if __name__ == "__main__":