Python SDK for ImageKit

Python SDK for ImageKit that implements the new APIs and interface for performing different file operations.

ImageKit is a complete image optimization and transformation solution that comes with and image CDN and media storage. It can be integrated with your existing infrastructure - storages like AWS s3, web servers, your CDN and custom domain names, allowing you to deliver optimize images in minutes with minimal code changes.

Table of contents -

• Installation
• Initialization
• URL generation
• File upload
• File management
• Utility functions
• Support
• Links

Installation

Go to your terminal and type the following command

pip install imagekitio

Initialization

from imagekitio import ImageKit
imagekit = ImageKit(
    private_key='your private_key',
    public_key='your public_key',
    url_endpoint = 'your url_endpoint'
)

Usage

You can use this Python SDK for 3 different kinds of methods - URL generation, file upload and file management. The usage of the SDK has been explained below

URL generation

1. Using Image path and image hostname or endpoint

This method allows you to create a URL using the path where the image exists and the URL endpoint(url_endpoint) you want to use to access the image. You can refer to the documentation here to read more about URL endpoints in ImageKit and the section about image origins to understand about paths with different kinds of origins.

imagekit_url = imagekit.url({
            "path": "/default-image.jpg",
            "url_endpoint": "https://ik.imagekit.io/your_imagekit_id/endpoint/",
            "transformation": [{"height": "300", "width": "400"}],
        }
)

The result in a URL like

https://ik.imagekit.io/your_imagekit_id/endpoint/tr:h-300,w-400/default-image.jpg

2.Using full image URL This method allows you to add transformation parameters to and existing, complete URL that is already mapped to ImageKit using src parameter. This method should be used if you have the complete image URL mapped to ImageKit stored in your database.

image_url = imagekit.url({
    "src": "https://ik.imagekit.io/your_imagekit_id/endpoint/default-image.jpg",
    "transformation" : [{
        "height": "300",
        "width": "400"
    }]
})

The results in a URL like

https://ik.imagekit.io/your_imagekit_id/endpoint/default-image.jpg?tr=h-300%2Cw-400

The .url() method accepts the following parameters

Option	Description
url_endpoint	Optional. The base URL to be appended before the path of the image. If not specified, the URL Endpoint specified at the time of SDK initialization is used. For example, https://ik.imagekit.io/your_imagekit_id/endpoint/
path	Conditional. This is the path at which the image exists. For example, /path/to/image.jpg. Either the path or src parameter need to be specified for URL generation.
src	Conditional. This is the complete URL of an image already mapped to ImageKit. For example, https://ik.imagekit.io/your_imagekit_id/endpoint/path/to/image.jpg. Either the path or src parameter need to be specified for URL generation.
transformation	Optional. An array of objects specifying the transformation to be applied in the URL. The transformation name and the value should be specified as a key-value pair in the object. Different steps of a chained transformation can be specified as different objects of the array. The complete list of supported transformations in the SDK and some examples of using them are given later. If you use a transformation name that is not specified in the SDK, it gets applied as it is in the URL.
transformation_position	Optional. Default value is path that places the transformation string as a path parameter in the URL. Can also be specified as query which adds the transformation string as the query parameter tr in the URL. If you use src parameter to create the URL, then the transformation string is always added as a query parameter.
query_parameters	Optional. These are the other query parameters that you want to add to the final URL. These can be any query parameters and not necessarily related to ImageKit. Especially useful, if you want to add some versioning parameter to your URLs.
signed	Optional. Boolean. Default is false. If set to true, the SDK generates a signed image URL adding the image signature to the image URL. This can only be used if you are creating the URL with the url_endpoint and path parameters, and not with the src parameter.
expire_seconds	Optional. Integer. Meant to be used along with the signed parameter to specify the time in seconds from now when the URL should expire. If specified, the URL contains the expiry timestamp in the URL and the image signature is modified accordingly.

Examples of generating URLs

1. Chained Transformations as a query parameter

    image_url = imagekit.url({
        "path": "/default-image.jpg",
        "url_endpoint": "https://ik.imagekit.io/your_imagekit_id/endpoint/",
        "transformation": [{
                    "height": "300",
                    "width": "400"
                },
                {
                    "rotation": 90
                }],
        "transformation_position ": "query"
    })

Sample Result URL -

https://ik.imagekit.io/your_imagekit_id/endpoint/default-image.jpg?tr=h-300%2Cw-400%3Art-90

2. Sharpening and contrast transforms and a progressive JPG image

There are some transforms like Sharpening that can be added to the URL with or without any other value. To use such transforms without specifying a value, specify the value as "-" in the transformation object, otherwise, specify the value that you want to be added to this transformation.

    image_url = imagekit.url({
        "src": "https://ik.imagekit.io/your_imagekit_id/endpoint/default-image.jpg",
        "transformation": [{
            "format": "jpg",
            "progressive": "true",
            "effect_sharpen": "-",
            "effect_contrast": "1"
        }]
    })

//Note that because `src` parameter was used, the transformation string gets added as a query parameter `tr`
https://ik.imagekit.io/your_imagekit_id/endpoint/default-image.jpg?tr=f-jpg%2Cpr-true%2Ce-sharpen%2Ce-contrast-1

3. Signed URL that expires in 300 seconds with the default URL endpoint and other query parameters

    image_url = imagekit.url({
        "path": "/default-image",
        "query_parameters": {
                    "v": "123"
        },
        "transformation": [{
            "height": "300",
            "width": "400"
        }],
        "signed": True,
        "expire_seconds": 300
    })

Sample Result URL

https://ik.imagekit.io/your_imagekit_id/tr:h-300,w-400/default-image.jpg?v=123&ik-t=1567358667&ik-s=f2c7cdacbe7707b71a83d49cf1c6110e3d701054

List of transformations

The complete list of transformations supported and their usage in ImageKit can be found here. The SDK gives a name to each transformation parameter, making the code simpler, making the code simpler and readable. If a transformation is supported in ImageKit, but a name for it cannot be found in the table below, then use the transformation code from ImageKit docs as the name when using in the url function.

Supported Transformation Name	Translates to parameter
height	h
width	w
aspect_ratio	ar
quality	q
crop	c
crop_mode	cm
x	x
y	y
focus	fo
format	f
radius	r
background	bg
border	bo
rotation	rt
blur	bl
named	n
overlay_image	oi
overlay_x	ox
overlay_y	oy
overlay_focus	ofo
overlay_height	oh
overlay_width	ow
overlay_text	ot
overlay_text_font_size	ots
overlay_text_font_family	otf
overlay_text_color	otc
overlay_alpha	oa
overlay_text_typography	ott
overlay_background	obg
overlay_image_trim	oit
progressive	pr
lossless	lo
trim	t
metadata	md
color_profile	cp
default_image	di
dpr	dpr
effect_sharpen	e-sharpen
effect_usm	e-usm
effect_contrast	e-contrast
effect_gray	e-grayscale
original	orig

File Upload

The SDK provides a simple interface using the .upload() method to upload files to the ImageKit Media library. It accepts all the parameters supported by the ImageKit Upload API.

The upload() method requires at least the file and the file_name parameter to upload a file and returns a callback with the error and result as arguments. You can pass other parameters supported by the ImageKit upload API using the same parameter name as specified in the upload API documentation. For example, to specify tags for a file at the time of upload use the tags parameter as specified in the documentation here

Simple usage

imagekit.upload(
    file = "<url|base_64|binary>", # required
    file_name= "my_file_name.jpg"  # required
)

Available options for request

Parameter	Description
file required	This field accepts three kinds of values: - binary - You can send the content of the file as binary. This is used when a file is being uploaded from the browser. - base64 - Base64 encoded string of file content. - url - URL of the file from where to download the content before uploading. Downloading file from URL might take longer, so it is recommended that you pass the binary or base64 content of the file. Pass the full URL, for example - https://www.example.com/rest-of-the-image-path.jpg.
file_name required	The name with which the file has to be uploaded.
use_unique_file_name optional	Whether to use a unique filename for this file or not. - Accepts true or false. - If set true, ImageKit.io will add a unique suffix to the filename parameter to get a unique filename. - If set false, then the image is uploaded with the provided filename parameter and any existing file with the same name is replaced. Default value - true
tags optional	Set the tags while uploading the file. - Comma-separated value of tags in format tag1,tag2,tag3. For example - t-shirt,round-neck,men - The maximum length of all characters should not exceed 500. - % is not allowed. - If this field is not specified and the file is overwritten then the tags will be removed.
folder optional	The folder path (e.g. /images/folder/) in which the image has to be uploaded. If the folder(s) didn't exist before, a new folder(s) is created. The folder name can contain: - Alphanumeric Characters: a-z , A-Z , 0-9 - Special Characters: /``_ and - - Using multiple / creates a nested folder. Default value - /
is_private_file optional	Whether to mark the file as private or not. This is only relevant for image type files. - Accepts true or false. - If set true, the file is marked as private which restricts access to the original image URL and unnamed image transformations without signed URLs. Without the signed URL, only named transformations work on private images Default value - false
custom_coordinates optional	Define an important area in the image. This is only relevant for image type files. To be passed as a string with the x and y coordinates of the top-left corner, and width and height of the area of interest in format x,y,width,height. For example - 10,10,100,100 Can be used with fo-customtransformation. If this field is not specified and the file is overwritten, then customCoordinates will be removed.
response_fields optional	Comma-separated values of the fields that you want ImageKit.io to return in response. For example, set the value of this field to tags,custom_coordinates,is_privateFile,metadata to get value of tags, custom_coordinates, is_privateFile , and metadata in the response.

if upload is succeeded, `error` will be `None` and the result will be same as what is received from ImageKit's servers. If the upload fails, `error` will be the same as what is received from ImageKit's servers and the result will be `None`

File Management

The SDK provides a simple interface for all the media APIs mentioned here to manage your files. This also returns error and result, error will be None if API succeeds.

1. List & Search Files

Accepts an object specifying the parameters to be used to list and search files. All parameters specified in the documentation here can be passed as is with the correct values to get the results.

    imagekit.list_files({
        "skip": 10,
        "limit": 10,
}
    )

2. Get File Details Accepts the file ID and fetches the details as per the API documentation here

imagekit.get_file_details(file_id)

3. Get File Metadata Accepts the file ID and fetches the metadata as per the API documentation here

imagekit.get_metadata(file_id)

4. Update File Details Update parameters associated with the file as per the API documentation here. The first argument to the update_field_details method is the file ID and the second argument is an object with the parameters to be updated.

imagekit.update_file_details("file_id", {
    "tags": ["image_tag"],
    "custom_coordinates": "10,10,100, 100"
})

6. Delete File Delete a file as per the API documentation here. The method accepts the file ID of the file that has to be deleted.

imagekit.delete_file(file_id)

6. Purge Cache Programmatically issue a cache clear request as clear request as pet the API documentation here. Accepts the full URL of the file for which the cache has to be cleared.

imagekit.purge_cache(full_url)

7. Purge Cache Status

Get the purge cache request status using the request ID returned when a purge cache request gets submitted as pet the API documentation here

imagekit.get_purge_cache_status(cache_request_id)

Utility functions

We have included following commonly used utility functions in this package.

Authentication parameter generation

In case you are looking to implement client-side file upload, you are going to need a token, expiry timestamp and a valid signature for that upload. The SDK provides a simple method that you can use in your code to generate these authentication parameters for you.

Note: The Private API Key should never be exposed in any client-side code. You must always generate these authentication parameters on the server-side

authentication

authentication_parameters = imagekit.get_authentication_parameters(token, expire)

Returns

{
    "token": "unique_token",
    "expire": "valid_expiry_timestamp",
    "signature": "generated_signature"
}

Both the token and expire parameters are optional. If not specified the SDK uses the uuid to generate a random token and also generates a valid expiry timestamp internally. The value of the token and expire used to generate the signature are always returned in the response, no matter if they are provided as an input to this method or not.

Distance calculation between two pHash values

Perceptual hashing allows you to constructing a has value that uniquely identifies an input image based on the contents of an image. imagekit.io metadata API returns the pHash value of an image in the response. You can use this value to find duplicate, near duplicate(similar) image by calculating distance between the two images.

This SDK exposes phash_distance function to calculate distance between two pHash value. It accepts two pHash hexadecimal strings and returns a numeric value indicative of the level of difference between the two images.

def calculate_distance():
    # fetch metadata of two uploaded image files
    ...
    # extract pHash strings from both: say 'first_hash' and 'second_hash'
    ...
    # calculate the distance between them:

    distance = imagekit.phash_distance(first_hash, second_hash)
    return distance

Distance calculation examples

imagekit.phash_distance('f06830ca9f1e3e90', 'f06830ca9f1e3e90')
# output: 0 (ame image)

imagekit.phash_distance('2d5ad3936d2e015b', '2d6ed293db36a4fb')
# output: 17 (similar images)

imagekit.phash_distance('a4a65595ac94518b', '7838873e791f8400')
# output: 37 (dissimilar images)

Sample Code Instruction

To run sample code go to sample directory and run

python sample.py

Support

For any feedback or to report any issues or general implementation support please reach out to [email protected]

Links

• Documentation

• Main Website

License

Released under the MIT license.