1 files changed, 45 insertions, 0 deletions
diff --git a/venv/lib/python3.11/site-packages/faker/providers/isbn/rules.py b/venv/lib/python3.11/site-packages/faker/providers/isbn/rules.py
new file mode 100644
index 0000000..db5d126
--- /dev/null
+++ b/venv/lib/python3.11/site-packages/faker/providers/isbn/rules.py
@@ -0,0 +1,45 @@
+"""
+This module exists solely to figure how long a registrant/publication
+number may be within an ISBN. The rules change based on the prefix and
+language/region. This list of rules only encapsulates the 978 prefix
+for English books. 978 is the largest and, until recently, the only
+prefix.
+
+The complete list of prefixes and rules can be found at
+https://www.isbn-international.org/range_file_generation
+"""
+
+from collections import namedtuple
+from typing import Dict, List
+
+RegistrantRule = namedtuple("RegistrantRule", ["min", "max", "registrant_length"])
+
+# Structure: RULES[`EAN Prefix`][`Registration Group`] = [Rule1, Rule2, ...]
+RULES: Dict[str, Dict[str, List[RegistrantRule]]] = {
+    "978": {
+        "0": [
+            RegistrantRule("0000000", "1999999", 2),
+            RegistrantRule("2000000", "2279999", 3),
+            RegistrantRule("2280000", "2289999", 4),
+            RegistrantRule("2290000", "6479999", 3),
+            RegistrantRule("6480000", "6489999", 7),
+            RegistrantRule("6490000", "6999999", 3),
+            RegistrantRule("7000000", "8499999", 4),
+            RegistrantRule("8500000", "8999999", 5),
+            RegistrantRule("9000000", "9499999", 6),
+            RegistrantRule("9500000", "9999999", 7),
+        ],
+        "1": [
+            RegistrantRule("0000000", "0999999", 2),
+            RegistrantRule("1000000", "3999999", 3),
+            RegistrantRule("4000000", "5499999", 4),
+            RegistrantRule("5500000", "7319999", 5),
+            RegistrantRule("7320000", "7399999", 7),
+            RegistrantRule("7400000", "8697999", 5),
+            RegistrantRule("8698000", "9729999", 6),
+            RegistrantRule("9730000", "9877999", 4),
+            RegistrantRule("9878000", "9989999", 6),
+            RegistrantRule("9990000", "9999999", 7),
+        ],
+    },
+}