save image in form django code example

Example 1: Django forms I cannot save picture file

class ImageUploadForm(forms.Form):
    """Image upload form."""
    image = forms.ImageField()

Example 2: Django forms I cannot save picture file

class ExampleModel(models.Model):
    model_pic = models.ImageField(upload_to = 'pic_folder/', default = 'pic_folder/None/no-img.jpg')