Numpy Array to base64 and back to Numpy Array - Python

Numpy Array to base64 and back to Numpy Array - Python

You can convert a NumPy array to a base64 encoded string and then back to a NumPy array in Python using the numpy library and the base64 module. Here's how you can do it:

  • Convert NumPy Array to Base64 String:
import numpy as np import base64 # Create a sample NumPy array original_array = np.array([1, 2, 3, 4, 5]) # Serialize the NumPy array to a binary format array_bytes = original_array.tobytes() # Encode the binary data as a base64 string base64_string = base64.b64encode(array_bytes).decode('utf-8') print("Base64 String:", base64_string)

In this code, we first convert the NumPy array original_array to a binary format using tobytes(), and then we encode that binary data as a base64 string using base64.b64encode().

  • Convert Base64 String Back to NumPy Array:

Now, to convert the base64 string back to a NumPy array, you'll need to reverse the process:

# Decode the base64 string to binary data decoded_bytes = base64.b64decode(base64_string) # Convert the binary data back to a NumPy array restored_array = np.frombuffer(decoded_bytes, dtype=np.int64) # Adjust the dtype as needed print("Restored NumPy Array:", restored_array)

In this code, we first decode the base64 string using base64.b64decode(), which gives us binary data. Then, we use np.frombuffer() to convert the binary data back into a NumPy array. Make sure to specify the correct dtype when using np.frombuffer() to match the original data type of your array.

By following these steps, you can convert a NumPy array to a base64 string and then back to a NumPy array while preserving the data.

Examples

  1. Search Query: "Convert NumPy array to base64 string in Python"

    • Description: This query aims to find methods to convert a NumPy array to a base64 string in Python, typically for data serialization or transmission.
    • Code:
      import numpy as np import base64 # Convert NumPy array to base64 string def numpy_array_to_base64(array): return base64.b64encode(array.tobytes()).decode('utf-8') # Example Usage array = np.array([[1, 2, 3], [4, 5, 6]]) base64_string = numpy_array_to_base64(array) print("Base64 String:", base64_string)

  2. Search Query: "Decode base64 string to NumPy array in Python"

    • Description: This query seeks methods to decode a base64 string back into a NumPy array in Python, useful for reconstructing data after transmission.
    • Code:
      import numpy as np import base64 # Decode base64 string to NumPy array def base64_to_numpy_array(base64_string, dtype=np.float64): decoded_bytes = base64.b64decode(base64_string) return np.frombuffer(decoded_bytes, dtype=dtype) # Example Usage base64_string = "AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8=" array = base64_to_numpy_array(base64_string) print("Decoded NumPy Array:", array)

  3. Search Query: "Serialize NumPy array to base64 string in Python"

    • Description: This query explores methods to serialize a NumPy array into a base64 string format in Python, often used for data interchange.
    • Code:
      import numpy as np import base64 # Serialize NumPy array to base64 string def numpy_array_to_base64(array): return base64.b64encode(array.tobytes()).decode('utf-8') # Example Usage array = np.array([[1, 2, 3], [4, 5, 6]]) base64_string = numpy_array_to_base64(array) print("Base64 String:", base64_string)

  4. Search Query: "Convert base64 string to NumPy array in Python"

    • Description: This query aims to convert a base64 string back into a NumPy array in Python, typically used for deserialization.
    • Code:
      import numpy as np import base64 # Convert base64 string to NumPy array def base64_to_numpy_array(base64_string, dtype=np.float64): decoded_bytes = base64.b64decode(base64_string) return np.frombuffer(decoded_bytes, dtype=dtype) # Example Usage base64_string = "AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8=" array = base64_to_numpy_array(base64_string) print("Decoded NumPy Array:", array)

  5. Search Query: "Encode NumPy array to base64 in Python"

    • Description: This query explores how to encode a NumPy array into a base64 string representation in Python, commonly used for data serialization.
    • Code:
      import numpy as np import base64 # Encode NumPy array to base64 string def numpy_array_to_base64(array): return base64.b64encode(array.tobytes()).decode('utf-8') # Example Usage array = np.array([[1, 2, 3], [4, 5, 6]]) base64_string = numpy_array_to_base64(array) print("Base64 String:", base64_string)

  6. Search Query: "Decode base64 to NumPy array in Python"

    • Description: This query investigates methods to decode a base64 string back into a NumPy array in Python, useful for reconstructing serialized data.
    • Code:
      import numpy as np import base64 # Decode base64 string to NumPy array def base64_to_numpy_array(base64_string, dtype=np.float64): decoded_bytes = base64.b64decode(base64_string) return np.frombuffer(decoded_bytes, dtype=dtype) # Example Usage base64_string = "AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8=" array = base64_to_numpy_array(base64_string) print("Decoded NumPy Array:", array)

  7. Search Query: "Serialize NumPy array to base64 string using Python"

    • Description: This query explores how to serialize a NumPy array into a base64 string using Python, often used for transmitting data over networks.
    • Code:
      import numpy as np import base64 # Serialize NumPy array to base64 string def numpy_array_to_base64(array): return base64.b64encode(array.tobytes()).decode('utf-8') # Example Usage array = np.array([[1, 2, 3], [4, 5, 6]]) base64_string = numpy_array_to_base64(array) print("Base64 String:", base64_string)

  8. Search Query: "Convert base64 string to NumPy array using Python"

    • Description: This query aims to convert a base64 string back into a NumPy array using Python, typically for deserializing transmitted data.
    • Code:
      import numpy as np import base64 # Convert base64 string to NumPy array def base64_to_numpy_array(base64_string, dtype=np.float64): decoded_bytes = base64.b64decode(base64_string) return np.frombuffer(decoded_bytes, dtype=dtype) # Example Usage base64_string = "AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8=" array = base64_to_numpy_array(base64_string) print("Decoded NumPy Array:", array)

  9. Search Query: "Encode NumPy array to base64 string with Python"

    • Description: This query explores how to encode a NumPy array into a base64 string using Python, often for data serialization purposes.
    • Code:
      import numpy as np import base64 # Encode NumPy array to base64 string def numpy_array_to_base64(array): return base64.b64encode(array.tobytes()).decode('utf-8') # Example Usage array = np.array([[1, 2, 3], [4, 5, 6]]) base64_string = numpy_array_to_base64(array) print("Base64 String:", base64_string)

  10. Search Query: "Decode base64 to NumPy array with Python"

    • Description: This query seeks methods to decode a base64 string back into a NumPy array using Python, typically for reconstructing serialized data.
    • Code:
      import numpy as np import base64 # Decode base64 string to NumPy array def base64_to_numpy_array(base64_string, dtype=np.float64): decoded_bytes = base64.b64decode(base64_string) return np.frombuffer(decoded_bytes, dtype=dtype) # Example Usage base64_string = "AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8=" array = base64_to_numpy_array(base64_string) print("Decoded NumPy Array:", array)

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