From 233045f889454889de32a75a08581dfa8b7678b4 Mon Sep 17 00:00:00 2001
From: chfw <wangc_2011@hotmail.com>
Date: Wed, 7 Oct 2020 22:58:17 +0100
Subject: [PATCH] :bug: fix the potential to leave unclosed handle.

---
 pyexcel_io/readers/csv_in_file.py |  1 +
 pyexcel_io/writers/csv_in_file.py | 12 +++++++-----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/pyexcel_io/readers/csv_in_file.py b/pyexcel_io/readers/csv_in_file.py
index 8e76930..b926242 100644
--- a/pyexcel_io/readers/csv_in_file.py
+++ b/pyexcel_io/readers/csv_in_file.py
@@ -61,3 +61,4 @@ class FileReader(IReader):
     def close(self):
         for reader in self.handles:
             reader.close()
+        self.handles = []
diff --git a/pyexcel_io/writers/csv_in_file.py b/pyexcel_io/writers/csv_in_file.py
index 21eb85c..46b23ac 100644
--- a/pyexcel_io/writers/csv_in_file.py
+++ b/pyexcel_io/writers/csv_in_file.py
@@ -10,18 +10,20 @@ class CsvFileWriter(IWriter):
         if file_type == constants.FILE_FORMAT_TSV:
             self._keywords["dialect"] = constants.KEYWORD_TSV_DIALECT
         self.__index = 0
-        self.writer = None
+        self.handlers = []
 
     def create_sheet(self, name):
-        self.writer = CSVFileWriter(
+        writer = CSVFileWriter(
             self._file_alike_object,
             name,
             sheet_index=self.__index,
             **self._keywords
         )
         self.__index = self.__index + 1
-        return self.writer
+        self.handlers.append(writer)
+        return writer
 
     def close(self):
-        if self.writer:
-            self.writer.close()
+        for writer in self.handlers:
+            writer.close()
+        self.handlers = []