Added command line paremeters

Added basic args, help

exif_rad.py

@@ -7,6 +7,7 @@ of a GeigerMuellerCounter."""
 
 from datetime import datetime
 import csv
+import argparse
 from PIL import Image
 import piexif
 import piexif.helper
@@ -22,36 +23,43 @@ import piexif.helper
 
 SIFACTOR = 0.0065 
 
-# Temp constants
-RAD = "0,15"
+parser = argparse.ArgumentParser(description='''A tool that writes 
+    radiation levels (and optionally geocoordinates) to image files 
+    and extracts the infos from external sources.''')
+parser.add_argument('csv', metavar='CSV', type=str, 
+                    help='Geiger counter history file in CSV format.')
+parser.add_argument('photos', metavar='Photo', type=str, nargs='+', 
+                    help='One or multiple photo image files to process.')
 
-# Load Image and EXIF data
-im = Image.open("testdata/DSC_0183.JPG")
-exif_dict = piexif.load(im.info["exif"])
+args = parser.parse_args()
 
-picrawtime = exif_dict["Exif"][piexif.ExifIFD.DateTimeOriginal].decode('ASCII')
-picisotime = datetime.strptime(picrawtime, "%Y:%m:%d %H:%M:%S")
+for photo in args.photos:
+    # Load Image and EXIF data
+    im = Image.open(photo)
+    exif_dict = piexif.load(im.info["exif"])
 
-print("Timestamp of image: ", picisotime)
+    picrawtime = exif_dict["Exif"][piexif.ExifIFD.DateTimeOriginal].decode('ASCII')
+    picisotime = datetime.strptime(picrawtime, "%Y:%m:%d %H:%M:%S")
 
-# Import GeigerCounter log
-with open("testdata/test.hisdb.his", "r") as f:
-    csvreader = csv.reader(filter(lambda row: row[0]!='#', f), delimiter=',', skipinitialspace=True)
-    for _, csvrawtime, csvrawcpm, _ in csvreader:
-        print(csvrawtime, csvrawcpm)
-        csvisotime = datetime.fromisoformat(csvrawtime)
-        
-        if csvisotime == picisotime:
-            rad = round(float(csvrawcpm) * SIFACTOR, 2)
-            print("Radiation at time of photo: ", rad, "µS/h")
+    print("Timestamp of image: ", picisotime)
 
-            # convert str to exif compatible string
-            new_comment = "Radiation ☢ " + str(rad) + " µS/h"
-            user_comment = piexif.helper.UserComment.dump(new_comment, encoding="unicode")
-            exif_dict["Exif"][piexif.ExifIFD.UserComment] = user_comment
+    # Import GeigerCounter log
+    with open("testdata/test.hisdb.his", "r") as f:
+        csvreader = csv.reader(filter(lambda row: row[0]!='#', f), delimiter=',', skipinitialspace=True)
+        for _, csvrawtime, csvrawcpm, _ in csvreader:
+            csvisotime = datetime.fromisoformat(csvrawtime)
             
-            # compile and write tags
-            print("Going to write comment: " + new_comment)
-            exif_bytes = piexif.dump(exif_dict)
-            im.save("testdata/test.jpg", exif=exif_bytes)
-            break
+            if csvisotime == picisotime:
+                rad = round(float(csvrawcpm) * SIFACTOR, 2)
+                print("Radiation at time of photo: ", rad, "µS/h")
+
+                # convert str to exif compatible string
+                new_comment = "Radiation ☢ " + str(rad) + " µS/h"
+                user_comment = piexif.helper.UserComment.dump(new_comment, encoding="unicode")
+                exif_dict["Exif"][piexif.ExifIFD.UserComment] = user_comment
+                
+                # compile and write tags
+                print("Going to write comment: " + new_comment)
+                exif_bytes = piexif.dump(exif_dict)
+                im.save("testdata/test.jpg", exif=exif_bytes)
+                break