Remove use of tmp file in stats

misc/stats

@@ -1,5 +1,22 @@
 #!/usr/bin/python
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
 
+# Copyright 2019 Lenovo
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+import io
 import numpy as np
 import matplotlib as mpl
 mpl.use('Agg')
@@ -23,15 +40,9 @@ while data:
     data = sys.stdin.readline()
 n, bins, patches = plt.hist(plotdata, 20)
 plt.show()
-path = tempfile.mkdtemp()
-plt.savefig('{0}/histo.png'.format(path))
+tdata = io.BytesIO()
+plt.savefig(tdata)
 writer = DumbWriter()
-writer.draw('{0}/histo.png'.format(path))
+writer.draw(tdata)
 print('Min: {3} Median: {0} Mean: {1} Max: {4} Standard Deviation: {2} Samples: {5}'.format(np.median(plotdata), np.mean(plotdata), np.std(plotdata), np.min(plotdata), np.max(plotdata), len(plotdata)))
-os.remove('{0}/histo.png'.format(path))
-os.rmdir(path)
-
-
-
-