From 15c1460fae10519df0a1d02888a8028ae7a797cf Mon Sep 17 00:00:00 2001
From: Tanner Prestegard <tanner.prestegard@ligo.org>
Date: Mon, 16 Apr 2018 08:02:30 -0500
Subject: [PATCH] adding some utility functions which might be helpful for
managing superevent IDs
---
gracedb/core/utils.py | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
create mode 100644 gracedb/core/utils.py
diff --git a/gracedb/core/utils.py b/gracedb/core/utils.py
new file mode 100644
index 000000000..a81b6673a
--- /dev/null
+++ b/gracedb/core/utils.py
@@ -0,0 +1,33 @@
+import string
+
+# Get lowercase alphabet as string
+ALPHABET = string.ascii_lowercase
+BASE = len(ALPHABET)
+
+def int_to_letters(num, positive_only=True):
+ """
+
+ Enumeration starts at 1 (i.e., 1 => 'a')
+ """
+
+ # Argument checking
+ if not isinstance(num, int):
+ raise TypeError("Input 'num' is not an int")
+ if (positive_only and num <= 0):
+ raise ValueError(("Input 'num' is non-positive, but the positive_only "
+ "flag is set"))
+
+ out_str = ''
+ while (num > BASE):
+ r = num % BASE
+ num /= BASE
+ out_str = ALPHABET[r-1] + out_str
+ out_str = ALPHABET[num-1] + out_str
+ return out_str
+
+def letters_to_int(letters):
+ # TODO: remove assert statement!
+ assert isinstance(letters, str), "letters is not a string"
+
+ letters = letters.lower()
+ pass
--
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