Updated Useful import scripts (markdown)

Useful-import-scripts.md

@@ -63,3 +63,49 @@ for w in r:
     d = parse(time)
     writer.writerow([d.strftime('%d.%m.%Y %H:%M'), weight, 0.0, 0.0, 0.0, 0.0, 0.0, comment])
 ```
+
+## openScale CSV file --> Garmin format
+
+by jowlo see https://github.com/oliexdev/openScale/issues/777
+
+```python
+#!/usr/bin/env python
+
+"""
+Simple script to transform openscale csv export files to a format accepted by garmin connect at
+https://connect.garmin.com/modern/import-data
+
+Note: When importing the language needs to be set to English, otherwise the import fails. 
+Set everything to metric units and to YYYY-MM-DD date format.
+
+If you want to compute BMI for the file give your height (im meters) as second parameter.
+"""
+
+import sys
+import csv
+from dateutil.parser import parse
+
+if len(sys.argv) < 2:
+    print "Missing file to transform\n"
+    sys.exit(1)
+
+bmi = lambda size: 0;
+if len(sys.argv) == 3:
+    bmi = lambda weight: weight/(float(sys.argv[2])**2)
+        
+
+with open("openScale_garmin_connect_import.csv", "wb") as outfile, open(sys.argv[1], "r") as infile:
+
+    reader = csv.DictReader(infile, delimiter=",")
+    writer = csv.writer(outfile, delimiter=",")
+    
+    outfile.write("Body\n")
+    outfile.write("Date,Weight,BMI,Fat\n")
+    for row in reader:
+        writer.writerow([
+            parse(row["dateTime"]).strftime('%Y-%m-%d'),
+            row["weight"],
+            bmi(float(row["weight"])),
+            row["fat"]
+            ])
+```