Azure Blob Storage Python SDK: Upload & Download Samples

from azure.storage.blob import BlobServiceClient, ContentSettings

def upload_blob(connection_string, container_name, local_file_path, blob_name):
    """
    Uploads a local file to an Azure Blob Storage container.

    Args:
        connection_string (str): The connection string for your Azure Storage account.
        container_name (str): The name of the blob container.
        local_file_path (str): The path to the local file to upload.
        blob_name (str): The name to give the blob in the container.
    """
    try:
        # Create the BlobServiceClient object
        blob_service_client = BlobServiceClient.from_connection_string(connection_string)

        # Get a client to interact with the specific blob
        blob_client = blob_service_client.get_blob_client(container=container_name, blob=blob_name)

        print(f"Uploading {local_file_path} to {blob_name}...")

        with open(local_file_path, "rb") as data:
            # Upload the file
            blob_client.upload_blob(data, overwrite=True) # overwrite=True will replace if blob already exists

        print("Upload complete.")

    except Exception as ex:
        print(f"Error uploading blob: {ex}")

if __name__ == "__main__":
    # Replace with your actual values
    # It's highly recommended to load these from environment variables or a secure configuration
    storage_connection_string = "YOUR_AZURE_STORAGE_CONNECTION_STRING"
    my_container_name = "your-container-name"
    my_local_file_path = "path/to/your/local/file.txt" # e.g., "my_document.pdf"
    my_blob_name = "uploaded-file.txt" # The name it will have in blob storage

    if storage_connection_string == "YOUR_AZURE_STORAGE_CONNECTION_STRING":
        print("Please replace 'YOUR_AZURE_STORAGE_CONNECTION_STRING' with your actual connection string.")
    else:
        # Create a dummy file for demonstration if it doesn't exist
        try:
            with open(my_local_file_path, "x") as f:
                f.write("This is a sample file for uploading to Azure Blob Storage.\n")
            print(f"Created dummy file: {my_local_file_path}")
        except FileExistsError:
            pass # File already exists, no need to create

        upload_blob(storage_connection_string, my_container_name, my_local_file_path, my_blob_name)
                

from azure.storage.blob import BlobServiceClient

def download_blob(connection_string, container_name, blob_name, local_download_path):
    """
    Downloads a blob from an Azure Blob Storage container to a local file.

    Args:
        connection_string (str): The connection string for your Azure Storage account.
        container_name (str): The name of the blob container.
        blob_name (str): The name of the blob to download.
        local_download_path (str): The path where the downloaded file will be saved.
    """
    try:
        # Create the BlobServiceClient object
        blob_service_client = BlobServiceClient.from_connection_string(connection_string)

        # Get a client to interact with the specific blob
        blob_client = blob_service_client.get_blob_client(container=container_name, blob=blob_name)

        print(f"Downloading {blob_name} to {local_download_path}...")

        with open(local_download_path, "wb") as download_file:
            download_file.write(blob_client.download_blob().readall())

        print("Download complete.")

    except Exception as ex:
        print(f"Error downloading blob: {ex}")

if __name__ == "__main__":
    # Replace with your actual values
    storage_connection_string = "YOUR_AZURE_STORAGE_CONNECTION_STRING"
    my_container_name = "your-container-name"
    my_blob_name_to_download = "uploaded-file.txt" # The name of the blob in storage
    my_local_download_path = "downloaded_file.txt" # The name of the file locally

    if storage_connection_string == "YOUR_AZURE_STORAGE_CONNECTION_STRING":
        print("Please replace 'YOUR_AZURE_STORAGE_CONNECTION_STRING' with your actual connection string.")
    else:
        download_blob(storage_connection_string, my_container_name, my_blob_name_to_download, my_local_download_path)
                

from azure.storage.blob import BlobServiceClient

def list_blobs(connection_string, container_name):
    """
    Lists all blobs in a specified Azure Blob Storage container.

    Args:
        connection_string (str): The connection string for your Azure Storage account.
        container_name (str): The name of the blob container.
    """
    try:
        blob_service_client = BlobServiceClient.from_connection_string(connection_string)
        container_client = blob_service_client.get_container_client(container_name)

        print(f"Blobs in container '{container_name}':")
        blob_list = container_client.list_blobs()

        for blob in blob_list:
            print(f"- {blob.name} (Size: {blob.size} bytes)")

    except Exception as ex:
        print(f"Error listing blobs: {ex}")

if __name__ == "__main__":
    # Replace with your actual values
    storage_connection_string = "YOUR_AZURE_STORAGE_CONNECTION_STRING"
    my_container_name = "your-container-name"

    if storage_connection_string == "YOUR_AZURE_STORAGE_CONNECTION_STRING":
        print("Please replace 'YOUR_AZURE_STORAGE_CONNECTION_STRING' with your actual connection string.")
    else:
        list_blobs(storage_connection_string, my_container_name)