添加 random 系列命令，对命令起始符为空的情况进行用户友好处理

commands/random.py

@@ -0,0 +1,82 @@
+import re
+import random
+import string
+
+from command import CommandRegistry, split_arguments
+from commands import core
+
+__registry__ = cr = CommandRegistry()
+
+
+@cr.register('随机数')
+@cr.register('number', hidden=True)
+@split_arguments()
+def number(_, ctx_msg, internal=False, argv=None):
+    if len(argv) == 0 or not re.match('x\d+', argv[-1]):
+        n = 1
+    else:
+        n = max(1, int(argv[-1][1:]))
+        argv = argv[:-1]
+
+    if len(argv) > 2 or any((not re.match('-?\d+', num) for num in argv)):
+        core.echo('参数有错误哦～\n正确的使用方法（主要看参数，你的命令是对的～）：\n\n'
+                  '/random.number\n'
+                  '/random.number x5\n'
+                  '/random.number 100\n'
+                  '/random.number 100 x10\n'
+                  '/random.number 50 100\n'
+                  '/random.number 50 100 x3',
+                  ctx_msg, internal)
+        return
+
+    if len(argv) == 1:
+        argv.append(1)
+
+    start, end = (int(argv[0]), int(argv[1])) if len(argv) == 2 else (None, None)
+    start, end = (min(start, end), max(start, end)) if start is not None else (start, end)
+
+    result = []
+
+    for _ in range(n):
+        result.append(random.randint(start, end) if start is not None else random.random())
+
+    core.echo(', '.join(str(num) for num in result), ctx_msg, internal)
+    return result
+
+
+@cr.register('随机字符')
+@cr.register('char', hidden=True)
+@split_arguments()
+def char(_, ctx_msg, internal=False, argv=None):
+    if len(argv) > 2 or (len(argv) == 2 and not re.match('x\d+', argv[-1])):
+        core.echo('参数有错误哦～\n正确的使用方法（主要看参数，你的命令是对的～）：\n\n'
+                  '/random.char\n'
+                  '/random.char x5\n'
+                  '/random.char ABCDEFG\n'
+                  '/random.char ABCDEFG x10\n',
+                  ctx_msg, internal)
+        return
+
+    chars = string.ascii_letters + string.digits
+    size = 1
+    if len(argv) and re.match('x\d+', argv[-1]):
+        size = max(1, int(argv[-1][1:]))
+        argv = argv[:-1]
+    if len(argv):
+        chars = argv[0]
+
+    result = ''.join(random.choice(chars) for _ in range(size))
+    core.echo(result, ctx_msg, internal)
+    return result
+
+
+@cr.register('随机化')
+@cr.register('shuffle', hidden=True)
+@split_arguments()
+def char(_, ctx_msg, internal=False, argv=None):
+    if len(argv) == 0:
+        core.echo('请传入正确的参数哦～', ctx_msg, internal)
+        return argv
+    random.shuffle(argv)
+    core.echo(', '.join(argv), ctx_msg, internal)
+    return argv