add parser & fix some whitespaces

main.py

@@ -1,5 +1,6 @@
 #!/usr/bin/python3
 
+import argparse
 import datetime as dt
 import dateutil.relativedelta
 import os
@@ -150,16 +151,25 @@ class Data:
         return "Data: {} {} {}".format(self.dtype, self.time, self.value)
 
 if __name__ == "__main__":
+
+    # parse arguments #
+    parser = argparse.ArgumentParser(description='Reference Data Collector DWD')
+    parser.add_argument('--target-file', default="Weatherdata.xlsx", help='File(-path) to save to')
+    args = parser.parse_args()
+
+    # check laste months #
     checkLastMonths()
 
+    # read in csv's #
     globPattern = "{}/*.csv".format(CSV_DIR)
     sheets = {}
     for f in glob.glob(globPattern):
         sheet = pyexcel.get_sheet(file_name=f, delimiter=";")
         sheets.update({ os.path.basename(f) : sheet })
 
+    # open & save spreadsheet book #
     book = pyexcel.get_book(bookdict=sheets)
-    outfileRaw = "Wetterdaten.xlsx"
+    outfileRaw = args.target_file
     book.save_as(outfileRaw)
 
     # formating and style #