How to decode Base64 data in Python?

How to decode Base64 data in Python?

To decode Base64 data in Python, you can use the base64 module, which provides functions for encoding and decoding data in Base64 format. Here's how you can decode Base64 data:

import base64 # Base64-encoded data encoded_data = b'VGhpcyBpcyBhIGJhc2U2NCBlbmNvZGluZyBkYXRhIGluIFB5dGhvbiBpcyBwcm92aWRlIGVtYWlsIHZpYSBNSU1FLCB3aXRob3V0IG1vZGlmaWNhdGlvbiBkdXJpbmcgYSBkYXRhIGZyb20gdGV4dC4=' # Decode the Base64 data decoded_data = base64.b64decode(encoded_data) # Convert the bytes to a string (if the data is a string) decoded_string = decoded_data.decode('utf-8') # Use the appropriate encoding if needed print(decoded_string)

In this example:

  1. Import the base64 module.
  2. Specify the Base64-encoded data in the encoded_data variable.
  3. Use base64.b64decode() to decode the Base64 data. The result is a bytes object.
  4. If the decoded data represents a string, you can use the decode() method to convert it to a string. Be sure to specify the appropriate encoding (e.g., 'utf-8').

The decoded_string variable will contain the decoded data as a string (if the original data was a string). If the original data was binary, decoded_data will contain the decoded binary data.

You can also decode Base64 data from files or other sources by reading the data and passing it to base64.b64decode().

Examples

  1. "Python decode Base64 string" Description: Users may want to decode Base64-encoded strings in Python to retrieve the original data.

    Code:

    import base64 # Base64 encoded string encoded_string = "SGVsbG8gV29ybGQh" # Decode Base64 string decoded_string = base64.b64decode(encoded_string).decode('utf-8')

  2. "Python Base64 decoding example" Description: This query might be looking for a simple example demonstrating how to decode Base64 data in Python.

    Code:

    import base64 # Base64 encoded data encoded_data = b'VGhpcyBpcyBhIHNhbXBsZSBkYXRhIGVuY29kaW5n' # Decode Base64 data decoded_data = base64.b64decode(encoded_data)

  3. "Python decode Base64 image" Description: Users may want to decode Base64-encoded images in Python to manipulate or display them.

    Code:

    import base64 from PIL import Image from io import BytesIO # Base64 encoded image data encoded_image_data = "base64_encoded_image_data_here" # Decode Base64 image data decoded_image_data = base64.b64decode(encoded_image_data) # Convert to PIL Image object image = Image.open(BytesIO(decoded_image_data))

  4. "Python Base64 decoding with error handling" Description: This query could be about handling errors that may occur during Base64 decoding in Python.

    Code:

    import base64 # Base64 encoded string encoded_string = "SGVsbG8gV29ybGQh" try: # Attempt to decode Base64 string decoded_string = base64.b64decode(encoded_string).decode('utf-8') except base64.binascii.Error as e: print("Error decoding Base64 string:", e)

  5. "Python decode Base64 PDF" Description: Users may want to decode Base64-encoded PDF files in Python for further processing or analysis.

    Code:

    import base64 # Base64 encoded PDF data encoded_pdf_data = "base64_encoded_pdf_data_here" # Decode Base64 PDF data decoded_pdf_data = base64.b64decode(encoded_pdf_data) # Now you can save or manipulate the PDF data

  6. "Python Base64 decoding for URL" Description: This query might be about decoding Base64-encoded data that's part of a URL in Python.

    Code:

    import base64 # Base64 encoded URL data encoded_url_data = "base64_encoded_url_data_here" # Decode Base64 URL data decoded_url_data = base64.urlsafe_b64decode(encoded_url_data)

  7. "Python Base64 string to bytes" Description: Users might be interested in converting Base64-encoded strings to bytes objects in Python.

    Code:

    import base64 # Base64 encoded string encoded_string = "SGVsbG8gV29ybGQh" # Convert Base64 string to bytes decoded_bytes = base64.b64decode(encoded_string)

  8. "Python Base64 decoding for email attachment" Description: This query could be about decoding Base64-encoded email attachments in Python.

    Code:

    import base64 # Base64 encoded email attachment data encoded_attachment_data = "base64_encoded_attachment_data_here" # Decode Base64 attachment data decoded_attachment_data = base64.b64decode(encoded_attachment_data)

  9. "Python Base64 decoding with padding" Description: Users may want to decode Base64-encoded data that includes padding characters in Python.

    Code:

    import base64 # Base64 encoded string with padding encoded_string = "SGVsbG8gV29ybGQh==" # Decode Base64 string with padding decoded_string = base64.b64decode(encoded_string).decode('utf-8')

  10. "Python Base64 decoding from file" Description: This query might be about decoding Base64-encoded data from a file in Python.

    Code:

    import base64 # Read Base64 encoded data from file with open('encoded_data.txt', 'r') as file: encoded_data = file.read() # Decode Base64 data decoded_data = base64.b64decode(encoded_data)

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