Start and end dates can be specified as command line arguments

get-yahoo-quotes.py

@@ -2,13 +2,9 @@
 
 """
 get-yahoo-quotes.py:  Script to download Yahoo historical quotes using the new cookie authenticated site.
-
  Usage: get-yahoo-quotes SYMBOL
-
  History
-
  06-03-2017 : Created script
-
 """
 
 __author__ = "Brad Luicas"
@@ -25,6 +21,7 @@
 import time
 import datetime
 import requests
+import calendar
 
 
 def split_crumb_store(v):
@@ -75,22 +72,37 @@ def get_now_epoch():
     # @see https://www.linuxquestions.org/questions/programming-9/python-datetime-to-epoch-4175520007/#post5244109
     return int(time.time())
 
+
+def get_time_epoch(iso_time):
+    return calendar.timegm(time.strptime(iso_time, '%Y-%m-%d'))
 
-def download_quotes(symbol):
-    start_date = 0
-    end_date = get_now_epoch()
+
+def download_quotes(symbol, start_date, end_date):
     cookie, crumb = get_cookie_crumb(symbol)
     get_data(symbol, start_date, end_date, cookie, crumb)
 
 
-if __name__ == '__main__':
+def main():
     # If we have at least one parameter go ahead and loop overa all the parameters assuming they are symbols
+    start_date = get_time_epoch('1970-01-01')
+    end_date = get_now_epoch()
+
     if len(sys.argv) == 1:
-        print("\nUsage: get-yahoo-quotes.py SYMBOL\n\n")
-    else:
-        for i in range(1, len(sys.argv)):
-            symbol = sys.argv[i]
-            print("--------------------------------------------------")
-            print("Downloading %s to %s.csv" % (symbol, symbol))
-            download_quotes(symbol)
-            print("--------------------------------------------------")
+        print("\nUsage: get-yahoo-quotes.py SYMBOL [optional yyyy-mm-dd]START_DATE [optional yyyy-mm-dd]END_DATE\n\n")
+        return
+
+    symbol = sys.argv[1]    
+    if len(sys.argv) > 2:
+        start_date = get_time_epoch(sys.argv[2])
+
+    if len(sys.argv) > 3:
+        end_date = get_time_epoch(sys.argv[3])
+
+    print("Downloading %s to %s.csv" % (symbol, symbol))
+    download_quotes(symbol, start_date, end_date)    
+
+
+if __name__ == '__main__':
+    main()
+
+print("--------------------------------------------------")