tiancheng91 · August 18, 2017 02:04 · Jan 9, 2013
diff --git a/base62.py b/base62.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+#-*- coding:utf-8 -*-
+# Base62 tools (convert number <=> string)
+# v1.0/20130109
+# python 2.x/3.x supported
+#
+#author: Ady Liu(imxylz@gmail.com)
+#github: github.com/adyliu
+
+import sys
+
+basedigits='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
+BASE=len(basedigits)
+
+
+def decode(s):
+    ret,mult = 0,1
+    for c in reversed(s):
+        ret += mult*basedigits.index(c)
+        mult *= BASE
+    return ret
+
+def encode(num):
+    if num <0: raise Exception("positive number "+num)
+    if num ==0: return '0'
+    ret=''
+    while num != 0:
+        ret = (basedigits[num%BASE])+ret
+        num = int(num/BASE)
+    return ret
+
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print("Usage: base62.py <num>...")
+        sys.exit(1)
+    width = max(len(x) for x in sys.argv[1:])
+    for argv in sys.argv[1:]:
+        try:
+            num = int(argv)
+            print('%*s %s %s' % (width,argv,'ENCODE',encode(num)))
+        except ValueError:
+            print('%*s %s %s' % (width,argv,'DECODE',decode(argv)))
diff --git a/demo.sh b/demo.sh
@@ -0,0 +1,6 @@
+adylab:bin adyliu$ python base62.py 16075652386131968 1bCQSgeUyk
+16075652386131968 ENCODE 1bCQSgeUyk
+       1bCQSgeUyk DECODE 16075652386131968
+adylab:bin adyliu$ python3 base62.py 16075652386131968 1bCQSgeUyk
+16075652386131968 ENCODE 1bCQSgeUyk
+       1bCQSgeUyk DECODE 16075652386131968