Problem to upload a file from local to Azure Blob Storage in python

Question

I try to upload a simple file to azure blob storage with the below code. When I run first-time "mu_blob" created but samplesource.txt didn't upload. When run second-time I received this error and the file didn't upload.

ErrorCode:BlobAlreadyExists
Error:None

from azure.storage.blob import BlobClient

blob = BlobClient.from_connection_string(conn_str="*****", container_name="test", blob_name="my_blob")

with open("./SampleSource.txt", "rb") as data:
    blob.upload_blob(data)

@ChristianSloper My problem is the SampleSource.txt didn't upload on the blob. — Mohsen Akhavan
– Mohsen Akhavan, Commented Feb 20, 2021 at 13:18
note that samplesource is not uploaeded.. it uploads to a blob called "my_blob" — Christian Sloper
– Christian Sloper, Commented Feb 20, 2021 at 13:40
@ChristianSloper I know but it's empty. I added a screenshot. — Mohsen Akhavan
– Mohsen Akhavan, Commented Feb 20, 2021 at 13:45

Harshita Singh · Accepted Answer · 2021-02-21 08:51:59Z

3

This is probably because you are creating blob with different name than SampleSource.txt. Check out below code sample to understand uploading of blob better:

# Create a local directory to hold blob data
local_path = "./data"
os.mkdir(local_path)

# Create a file in the local data directory to upload and download
local_file_name = str(uuid.uuid4()) + ".txt"
upload_file_path = os.path.join(local_path, local_file_name)

# Write text to the file
file = open(upload_file_path, 'w')
file.write("Hello, World!")
file.close()

# Create a blob client using the local file name as the name for the blob
blob_client = blob_service_client.get_blob_client(container=container_name, blob=local_file_name)

print("\nUploading to Azure Storage as blob:\n\t" + local_file_name)

# Upload the created file
with open(upload_file_path, "rb") as data:
    blob_client.upload_blob(data)

I would further suggest you to go through Quickstart: Manage blobs with Python v12 SDK.

answered Feb 21, 2021 at 8:51

Harshita Singh

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1 Comment

yeamusic21 Over a year ago

I had this issue and my solution as to use "from_connection_string" vs. other connection methods. The person who submitted the original question should check that their connection string is correct and also check that it's from the correct storage account.

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