Category Archives: Python

This script is written in python to perform EXFS corrections of digital photos. This script traverses the specified directory, stores all images, then performs the required transform to make the images display correctly.

#! /usr/bin/python
import time
import os
from random import randint
import pexif
from PIL import Image, ExifTags
photo_list = [] #List of all photo paths traversed by OS.WALK
for root, dirs, files in os.walk(“/yourpath/”):
        for file in files:
                if file.endswith(“.png”) or file.endswith(“.jpeg”) or file.endswith(“.jpg”) $
#                       print(os.path.join(root, file)) #Debug for path checking
                        photo_list.append(os.path.join(root, file)) #Add the current path+ph$
for photo in photo_list:
        #print(“Try this: ” + photo)
        img = pexif.JpegFile.fromFile(photo)
        #print(photo + “<- Path Orient ->   ” + str(img.exif.primary.Orientation[0]))
        try:
                image=Image.open(photo)
                for orientation in ExifTags.TAGS.keys():
                        if ExifTags.TAGS[orientation]==’Orientation’:
                                break
                exif=dict(image._getexif().items())
                if exif[orientation] == 3:
                        image=image.rotate(180, expand=True)
                elif exif[orientation] == 6:
                        image=image.rotate(270, expand=True)
                elif exif[orientation] == 8:
                        image=image.rotate(90, expand=True)
                image.save(photo)
                image.close()
        except (AttributeError, KeyError, IndexError):
        # cases: image don’t have getexif
                print(“broke”)

I was looking for a quick way to scan every photo on my media server, and display them one at a time in a photo slideshow. I wanted a python program to power my digital photo frame using a raspberry pi.

My hardware setup is a file share that is mapped from a Raspberry Pi. The software piece is a simple python script running from my CGI-Bin. The code is pasted below. It is a quick hack that I plan to optimize later, but I hope it helps you if you are in need of a solution.

#! /usr/bin/python
print “Content-type: text/html\n\n”;
#DOCTYPE keeps inducing an error violating the CSS so it is commented out for now
#print(“””<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Strict//EN”
import time
import os
from random import randint
photo_list = [] #List of all photo paths traversed by OS.WALK
display_list = [] #List of photos to be displayed (Currently only using one photo at a time)
for root, dirs, files in os.walk(“/mnt/storage/Pictures/Universal_Trip_2017/”): #Traverse from the listed root directory
        for file in files:
                if file.endswith(“.png”) or file.endswith(“.jpeg”) or file.endswith(“.jpg”) or file.endswith(“.JPG”): #The file types to add to the photo_list
#                       print(os.path.join(root, file)) #Debug for path checking
                        photo_list.append(os.path.join(root, file)) #Add the current path+photo to display_list
count = 0
while count < 1:
        random_pic = randint(0,len(photo_list)-1)
        display_list.append(photo_list[random_pic])
        count = count + 1
#HTML code ot generate the webpage (Edit as needed)
print(“<html>”)
print(“<head>”)
print(“<title>Xile Image Magic</title>”)
print(‘<link rel=”stylesheet” type=”text/css” href=”../im_style.css” />’)
print(‘<meta http-equiv=”refresh” content=”5″ />’)
print(“</head>”)
print(“<body>”)
#Print all images added to the display_list
for photo_path in display_list:
#       print(photo_path[21:])  #Debug
        print(“<div class=\”main\”>”)
        print(“<img src=\”” + “/image_magic/” + photo_path[21:] + “\” alt=\”\” />”)
        print(“</div>”)
#Optional Statement for printing the path of the current displayed photo
print(“<h5>” + display_list[0] + “</h5>”)
print(“</body>”)
print(“</html>”)
I created some CSS to make the displayed page a little easier on the eyes.
body
{
background-color: #123552;
}img
{
margin: 2px;
border: 1px solid #ccc;
border-radius: 8px;
display: block;
margin: auto;
margin-bottom: 2px;
height: 85%;
width: auto;
}div.main img
{
margin: 2px;
border: 1px solid #ccc;
border-radius: 8px;
display: block;
margin: auto;
margin-bottom: 2px;
height: 85%;
width: auto;
}h5, h6
{
display: block;
margin: auto;
border: 1px solid #ccc;
text-align: center;
background-color: #496C89;
color: white;
width:50%;
}
Also, because I am using a NAS, I had to edit my Apache Server to allow me to use an alias to access the server. The snippet from my Apache2 conf is pasted below.
Edit: /etc/apache2/sites-available/000-default.conf
Alias /image_magic/ /your/mount/point/
<Directory “/mnt/storage/Pictures/”>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
#Order allow,deny
#Allow from all
Require all granted
</Directory>
 I hope you find this helpful in your attempt to make your own live photo display.

 

Python Cheat Sheet – Working With Lists

Working with Lists: A quick description of different operations that can be performed on a python list

#Declare a list with 2 initial values
computers = ["ibm", "apple"]

#2 Different ways to add items to my existing list
computers.append ("dell")
computers.insert(0, "gateway")

print("\nA complete list of computers I have worked on")
print(computers)

#Sorted prints the list without changing it, sort modifys the list
print("\nA sorted list of computers I have worked on")
print(sorted(computers))
computers.sort()

print(computers)
print("")

#A loop to print each item in title case
 for computer in computers:
      print(computer.title())

computers.pop()
computers.remove("gateway")
print(computers)

#Slicing
print(computers[0:1])

#Print Last
print(computers[-1])