feat: add length->period kwargs alias across all 168 indicator functions for pandas-ta compat

python/tools/add_length_alias.py

@@ -0,0 +1,43 @@
+"""Add length→period alias to all old-style Python wrapper functions.
+
+Replaces:  period = int(period)
+With:      period = int(kwargs.get("length", period))
+
+Only targets exact standalone `period = int(period)` lines (4-space indent).
+Does NOT touch compound names like fastPeriod, slowPeriod, etc.
+"""
+import re
+import os
+import glob
+
+base = os.path.join(os.path.dirname(__file__), '..', 'quantalib')
+base = os.path.normpath(base)
+files = sorted(glob.glob(os.path.join(base, '*.py')))
+total = 0
+
+for fpath in files:
+    fname = os.path.basename(fpath)
+    if fname.startswith('_'):
+        continue
+    with open(fpath, 'r', encoding='utf-8') as f:
+        content = f.read()
+
+    # Match exactly '    period = int(period)' (4-space indent, standalone)
+    pattern = r'^(    )period = int\(period\)$'
+    matches = re.findall(pattern, content, re.MULTILINE)
+    count = len(matches)
+    if count > 0:
+        new_content = re.sub(
+            pattern,
+            r'\1period = int(kwargs.get("length", period))',
+            content,
+            flags=re.MULTILINE,
+        )
+        with open(fpath, 'w', encoding='utf-8') as f:
+            f.write(new_content)
+        print(f'{fname}: {count} replacements')
+        total += count
+    else:
+        print(f'{fname}: 0 (skipped)')
+
+print(f'\nTotal: {total} replacements across {len(files)} files')