using logger

app.py

@@ -1,11 +1,14 @@
 import os
 import shutil
 import uuid
+import logging
 
 from flask import Flask, redirect, url_for, request, flash, session
 from flask import render_template
 from flask import send_file
 
+logger = logging.getLogger(__name__)
+logging.basicConfig(level=logging.INFO)
 app = Flask(__name__)
 app.config['SEND_FILE_MAX_AGE_DEFAULT'] = 0
 app.config["SECRET_KEY"] = '#thaistartsfirst!'
@@ -27,6 +30,7 @@ def index():
     if user_id is None:
         user_id = uuid.uuid4()
         session['_id'] = user_id
+        logger.info(user_id)
         with open(f"{app.config['OUT']}/{user_id}.csv", 'w') as f:
             f.write("image,id,name,xMin,xMax,yMin,yMax\n")
 
@@ -38,14 +42,14 @@ def index():
         try:
             os.mkdir(img_folder)
         except:
-            print('user already has an active session')
+            logger.info('user already has an active session')
         files = request.files.getlist("file")
         filenames = []
         for f in files:
             f.save(os.path.join(img_folder, f.filename))
             filenames.append(f.filename)
         app.config["FILES"] = filenames
-        print(app.config["FILES"], app.config["HEAD"])
+        logger.info(app.config["FILES"], app.config["HEAD"])
         return redirect('/tagger', code=302)
     else:
         return render_template('index.html')