X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/17cd77ac947e2c8f4ca51aa930ffc235051d7f72..05bfa9a17e8d46d9a388fea130b7df33b7aa15c6:/sdk/python/arvados/util.py

diff --git a/sdk/python/arvados/util.py b/sdk/python/arvados/util.py
index 1a97358605..66da2d12af 100644
--- a/sdk/python/arvados/util.py
+++ b/sdk/python/arvados/util.py
@@ -2,10 +2,14 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
+from __future__ import division
+from builtins import range
+
 import fcntl
 import hashlib
 import httplib2
 import os
+import random
 import re
 import subprocess
 import errno
@@ -399,3 +403,16 @@ def ca_certs_path(fallback=httplib2.CA_CERTS):
         if os.path.exists(ca_certs_path):
             return ca_certs_path
     return fallback
+
+def new_request_id():
+    rid = "req-"
+    # 2**104 > 36**20 > 2**103
+    n = random.getrandbits(104)
+    for _ in range(20):
+        c = n % 36
+        if c < 10:
+            rid += chr(c+ord('0'))
+        else:
+            rid += chr(c+ord('a')-10)
+        n = n // 36
+    return rid