upgrade to 0.7.20.1

Author: wjsi

docs/source/df-sort-distinct-apply.rst

@@ -456,7 +456,7 @@ apply 的自定义函数接收一个参数，为上一步 Collection 的一行
 使用 apply 对行操作，且 ``reduce``\ 为 False 时，可以使用 :ref:`dflateralview` 与已有的行结合，用于后续聚合等操作。
 
 .. code:: python
-  
+
     >>> from odps.df import output
     >>>
     >>> @output(['iris_add', 'iris_sub'], ['float', 'float'])
@@ -576,6 +576,7 @@ PyODPS DataFrame也支持MapReduce API，用户可以分别编写map和reduce函
     >>>         yield word.lower(), 1
     >>>
     >>> def reducer(keys):
+    >>>     # 这里使用 list 而不是 cnt = 0，否则 h 内的 cnt 会被认为是局部变量，其中的赋值无法输出
     >>>     cnt = [0]
     >>>     def h(row, done):  # done表示这个key已经迭代结束
     >>>         cnt[0] += row[1]
@@ -629,6 +630,7 @@ group参数用来指定reduce按哪些字段做分组，如果不指定，会按
     >>>
     >>> @output(['word', 'cnt'], ['string', 'int'])
     >>> def reducer(keys):
+    >>>     # 这里使用 list 而不是 cnt = 0，否则 h 内的 cnt 会被认为是局部变量，其中的赋值无法输出
     >>>     cnt = [0]
     >>>     def h(row, done):  # done表示这个key已经迭代结束
     >>>         cnt[0] += row.cnt

docs/source/locale/en/LC_MESSAGES/api-df.po

@@ -8,14 +8,14 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PyODPS 0.7.16\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-07-10 10:42+0800\n"
+"POT-Creation-Date: 2018-11-08 12:41+0800\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <[email protected]>\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"Generated-By: Babel 2.5.3\n"
+"Generated-By: Babel 2.6.0\n"
 
 #: ../../source/api-df.rst:4
 msgid "DataFrame Reference"
@@ -679,7 +679,15 @@ msgid "collection"
 msgstr ""
 
 #: odps.df.CollectionExpr.columns:1 of
-msgid "*return* -- columns :rtype: list which each element is a Column"
+msgid "columns :rtype: list which each element is a Column"
+msgstr ""
+
+#: odps.df.CollectionExpr.columns odps.df.SequenceExpr.dtype of
+msgid "type"
+msgstr ""
+
+#: odps.df.CollectionExpr.columns:4 of
+msgid "return"
 msgstr ""
 
 #: odps.df.CollectionExpr.compile:1 odps.df.RandomScalar.compile:1
@@ -1902,14 +1910,18 @@ msgstr ""
 
 #: odps.df.SequenceExpr.dtype:1 of
 msgid ""
-"*Return the data type. Available types* -- int8, int16, int32, int64, "
-"float32, float64, boolean, string, decimal, datetime"
+"int8, int16, int32, int64, float32, float64, boolean, string, decimal, "
+"datetime"
 msgstr ""
 
 #: odps.df.SequenceExpr.dtype:3 of
 msgid "the data type"
 msgstr ""
 
+#: odps.df.SequenceExpr.dtype:5 of
+msgid "Return the data type. Available types"
+msgstr ""
+
 #: odps.df.RandomScalar.fillna:1 odps.df.Scalar.fillna:1
 #: odps.df.SequenceExpr.fillna:1 of
 msgid "Fill null with value."