Using Google photos API (Picasa API) to upload pictures from desktop to Google photos. Script can do the following:

• Show all existing albums
• Dry Run mode - will show what the script will do, but won't upload pics
• Uploads all images

• Download library gdata-python-client
• Add PYTHONPATH with path where the library is extracted Steps here
• Create keys in google cloud project and get ID and Secret Key Steps here
• Install all dependencies. All packages on my system are in packages.txt
• Create a new album for uploading photos on Google Photos.
• Open UploadPhotos.py and change config variables (Set MODE=1 initially)
• Run the script and install all missing dependencies/resolve python errors. You should see list of all you albums including the one you created.
• Copy the id of that album (numeric number) and add it to config.
• Run the script with MODE=2. You should see all messages of what the script will do.
• If everything looks good, then run with MODE=3. You should see all photos that have been uploaded.

• if client_secrets.json and credentials.dat are not created automatically, then create blank files manually.
• result.log file contains all log messages that are also displayed on the console.
• error.log file contains path of all images that may not have been uploaded
• other_files.log contains path of all files that were not image files found in the folders.
• Script adds all pictures recursively while doing the following:
  • Say your picture is in rootdir/Trip1/Beach/pic1.jpg. Then the file name would be pic1.jpg and summary of pic would be Trip1, Beach
  • If the folder (not root folder) has date (e.g. 2017-02-28 - Beach day), then you can set UPDATE_FILE_METADATA in config to True. This will check all pics in that folder and update metadata date to 2017-02-28 if date on picture and folder differs by more than FILE_METADATA_DATE_TOLERANCE (in config)