<form action="upload.php" method="post" enctype="multipart/form-data">
Select image to upload:
<input type="file" name="fileToUpload" id="fileToUpload">
<input type="submit" value="Upload Image" name="submit">
</form>

files={'fileToUpload': open(uploading.jpg', 'rb)}
p=requests.post(url, files=files)