fix docstring (#459)

msgpack/_unpacker.pyx

@@ -212,49 +212,76 @@ def unpackb(object packed, *, object object_hook=None, object list_hook=None,
 
 
 cdef class Unpacker(object):
-    """
-    MessagePack Packer
+    """Streaming unpacker.
 
-    Usage::
+    Arguments:
 
-        packer = Packer()
-        astream.write(packer.pack(a))
-        astream.write(packer.pack(b))
+    :param file_like:
+        File-like object having `.read(n)` method.
+        If specified, unpacker reads serialized data from it and :meth:`feed()` is not usable.
 
-    Packer's constructor has some keyword arguments:
+    :param int read_size:
+        Used as `file_like.read(read_size)`. (default: `min(16*1024, max_buffer_size)`)
 
-    :param callable default:
-        Convert user type to builtin type that Packer supports.
-        See also simplejson's document.
+    :param bool use_list:
+        If true, unpack msgpack array to Python list.
+        Otherwise, unpack to Python tuple. (default: True)
 
-    :param bool use_single_float:
-        Use single precision float type for float. (default: False)
+    :param bool raw:
+        If true, unpack msgpack raw to Python bytes.
+        Otherwise, unpack to Python str by decoding with UTF-8 encoding (default).
 
-    :param bool autoreset:
-        Reset buffer after each pack and return its content as `bytes`. (default: True).
-        If set this to false, use `bytes()` to get content and `.reset()` to clear buffer.
+    :param int timestamp:
+        Control how timestamp type is unpacked:
 
-    :param bool use_bin_type:
-        Use bin type introduced in msgpack spec 2.0 for bytes.
-        It also enables str8 type for unicode. (default: True)
+            0 - Timestamp
+            1 - float  (Seconds from the EPOCH)
+            2 - int  (Nanoseconds from the EPOCH)
+            3 - datetime.datetime  (UTC).  Python 2 is not supported.
 
-    :param bool strict_types:
-        If set to true, types will be checked to be exact. Derived classes
-        from serializable types will not be serialized and will be
-        treated as unsupported type and forwarded to default.
-        Additionally tuples will not be serialized as lists.
-        This is useful when trying to implement accurate serialization
-        for python types.
+    :param bool strict_map_key:
+        If true (default), only str or bytes are accepted for map (dict) keys.
 
-    :param bool datetime:
-        If set to true, datetime with tzinfo is packed into Timestamp type.
-        Note that the tzinfo is stripped in the timestamp.
-        You can get UTC datetime with `timestamp=3` option of the Unpacker.
-        (Python 2 is not supported).
+    :param callable object_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a dict argument after unpacking msgpack map.
+        (See also simplejson)
+
+    :param callable object_pairs_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a list of key-value pairs after unpacking msgpack map.
+        (See also simplejson)
 
     :param str unicode_errors:
-        The error handler for encoding unicode. (default: 'strict')
-        DO NOT USE THIS!!  This option is kept for very specific usage.
+        The error handler for decoding unicode. (default: 'strict')
+        This option should be used only when you have msgpack data which
+        contains invalid UTF-8 string.
+
+    :param int max_buffer_size:
+        Limits size of data waiting unpacked.  0 means 2**32-1.
+        The default value is 100*1024*1024 (100MiB).
+        Raises `BufferFull` exception when it is insufficient.
+        You should set this parameter when unpacking data from untrusted source.
+
+    :param int max_str_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of str. (default: max_buffer_size)
+
+    :param int max_bin_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of bin. (default: max_buffer_size)
+
+    :param int max_array_len:
+        Limits max length of array.
+        (default: max_buffer_size)
+
+    :param int max_map_len:
+        Limits max length of map.
+        (default: max_buffer_size//2)
+
+    :param int max_ext_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max size of ext type.  (default: max_buffer_size)
 
     Example of streaming deserialize from file-like object::
 

msgpack/fallback.py

@@ -260,7 +260,7 @@ class Unpacker(object):
 
     Example of streaming deserialize from socket::
 
-        unpacker = Unpacker(max_buffer_size)
+        unpacker = Unpacker()
         while True:
             buf = sock.recv(1024**2)
             if not buf: