Django open excel.xlsx with openpyxl from Google Cloud Storage - django

Question

I need to open a .xlsx file from my bucket on Google Cloud Storage, the problem is I get :FileNotFoundError at /api/ficha-excel
[Errno 2] No such file or directory: 'ficha.xlsx'
These are the settings from my bucket.
UPLOAD_ROOT = 'reportes/'
MEDIA_ROOT = 'reportes'
These are the route bucket/reportes/ficha.xlsx
This is the code of my get function:
directorio = FileSystemStorage("/reportes").base_location
os.makedirs(directorio, exist_ok=True)
# read
print("Directorios: ", directorio)
plantilla_excel = openpyxl.load_workbook(f"{directorio}/ficha.xlsx")
print(plantilla_excel.sheetnames)
currentSheet = plantilla_excel['Hoja1']
print(currentSheet['A5'].value)
What is the problem with the path? I can't figure out.

Answer 1

The below solution doesn’t use Django FileStorage/Storage classes. It opens a .xlsx file from the Cloud Storage bucket on Google Storage using openpyxl.
Summary :
I uploaded the Excel file on GCS, read the Blob data with openpyxl via BytesIO and saved the data in the workbook using the .save() method.
Steps to Follow :
Create a Google Cloud Storage bucket. Choose a globally unique name for it. Keep with the defaults and finally enter Create.
Choose an Excel file from your local system and upload it in the bucket using the “Upload files” option.
Once you have the excel file in your bucket, follow the steps below :
Go to Google Cloud Platform and create a service account (API). Click
Navigation Menu> APIs & Services> Credentials to go to the screen.
Then click Manage Service Accounts.
On the next screen, click Create Service Account.
Enter the details of the service account for each item.
In the next section, you will create a role for Cloud Storage. Choose
Storage Admin (full permission).
Click the service account you created, click Add Key in the Keys
field, and select Create New Key.
Select JSON as the key type and "create" it. Since the JSON file is
downloaded in the local storage, use the JSON file in the next item
and operate Cloud Storage from Python.
We will install the libraries required for this project in Cloud
Shell First, install the Google Cloud Storage library with pip
install to access Cloud Storage:
pip install google-cloud-storage
Install openpyxl using :
pip install openpyxl
Create a folder (excel) with the name of your choice in your Cloud editor.
Create files within it :
main.py
JSON key file (the one that got downloaded in local storage, copy that
file into this folder)
excel
main.py
●●●●●●●●●●.json
Write the below lines of code in main.py file :
from google.cloud import storage
import openpyxl
import io
#Create a client instance for google cloud storage
client = storage.Client.from_service_account_json('●●●●●●●●●●.json') //The path to your JSON key file which is now
#Get an instance of a bucket
bucket = client.bucket(‘bucket_name’) //only the bucketname will do, full path not necessary.
##Get a blob instance of a file
blob = bucket.blob(‘test.xlsx') // test.xlsx is the excel file I uploaded in the bucket already.
buffer = io.BytesIO()
blob.download_to_file(buffer)
wb = openpyxl.load_workbook(buffer)
wb.save('./retest.xlsx')
You will see a file ‘retest.xlsx’ getting created at the same folder in Cloud Editor.