- check timestamp

git-svn-id: http://moon:8086/svn/projects/Stock@301 fda53097-d464-4ada-af97-ba876c37ca34

pandas_eval.py

@@ -3,7 +3,8 @@ import pandas_datareader.data as web
 import numpy as np
 import math
 import matplotlib.pyplot as plt
-import datetime
+import datetime as dt
+import os
 
 # Stock Investors Financial Math
 # https://www.fmlabs.com/reference/default.htm?url=SimpleMA.htm
@@ -98,36 +99,37 @@ data = {}
 titles = []
 titles.append('AAPL')
 titles.append('XLNX')
-
+titles.append('QCOM')
+titles.append('DPW.DE')
 
 for title in titles:
 
+	filename = title + '.h5'
 	fetch = False
-	today = datetime.date.today()
+	today = dt.date.today()
 
 	try:
-		hdf = pd.HDFStore(title + '.h5', 'r')
+		hdf = pd.HDFStore(filename, 'r')
+		hdf.close()
 	except IOError as e:
 		fetch = True
-		print (e)
 
-	try:
-		data = hdf[title]
-	except Exception as e:
+	lastmodified = dt.datetime.fromtimestamp(os.stat(filename).st_mtime).date()
+	if lastmodified != today:
 		fetch = True
-		print (e)
 
 	if fetch:
 		print ("Fetching \"{}\"".format(title))
-		hdf.close()
 		# Get stock price via data reader
-		start = datetime.datetime(2016,1,1)
-		end = datetime.date.today()
+		start = dt.datetime(2019,1,1)
+		end = dt.date.today()
 		data = web.DataReader(title, "av-daily", start, end, api_key=key)
-	#	data = web.DataReader(title, "stooq", start, end)
 		hdf = pd.HDFStore(title + '.h5')
 		hdf[title] = data
-		hdf.close()
+	else:
+		hdf = pd.HDFStore(filename, 'r')
+		data = hdf[title]
+	hdf.close()
 
 
 data['ema'] = ema(data, key='close', alpha=0.75)
@@ -156,5 +158,3 @@ plt.legend()
 plt.grid()
 
 plt.show()
-
-hdf.close()