Cannot convert base64 string into image

Question

Can someone help me turn this base64 data into image? I don't know if it's because the data was not decoded properly or anything else. Here is how I decoded the data:

import base64

c_data = { the data in the link (string type) }

c_decoded = base64.b64decode(c_data)

But it gave the error Incorrect Padding so I followed some tutorials and tried different ways to decode the data.

c_decoded = base64.b64decode(c_data + '=' * (-len(c_data) % 4))

c_decoded = base64.b64decode(c_data + '=' * ((4 - len(c_data) % 4) % 4)

Both ways decoded the data without giving the error Incorrect Padding but now I can't turn the decoded data into image.
I have tried creating an empty png then write the decoded data into it:

from PIL import Image

with open('c.png', 'wb') as f:
    f.write(c_decoded)
image = Image.open('c.png')
image.show()

It didn't work and gave the error: cannot identify image file 'c.png'
I have tried using BytesIO:

from PIL import Image
import io
from io import BytesIO

image = Image.open(io.BytesIO(c_decoded))
image.show()

Now it gave the error: cannot identify image file <_io.BytesIO object at 0x0000024082B20270>
Please help me.

Answer 1

Credit to @jps for explaining why my code didn't work. Check out @Mark Setchell solution for the reliable way of decoding base64 data (his code fixes my mistake that @jps pointed out)

So basically remove the [data:image/png;base64,] at the beginning of the base64 string because it is just the format of the data. Change this:

c = "data:image/png;base64,iVBORw0KGgoAAAANSUh..."

to this:

c = "iVBORw0KGgoAAAANSUh..."

and now we can use

c_decoded = base64.b64decode(c)