No module named 'azure'

is running normal in local
but when i deployment in azure app is got
:( Application Error
```
from azure.storage.blob import BlobClient
No module named 'azure'
```

my requirements.txt file :
click==6.7
Flask==1.0.2
itsdangerous==0.24
Jinja2==2.10
MarkupSafe==1.0
Werkzeug==0.14.1
azure-storage-blob==12.0.0

`(venv) $ pip freeze `
azure-core==1.1.1
azure-storage-blob==12.1.0
azure-storage-queue==12.1.0
certifi==2019.11.28
cffi==1.13.2
chardet==3.0.4
click==6.7
cryptography==2.8
Flask==1.0.2
idna==2.8
isodate==0.6.0
itsdangerous==0.24
Jinja2==2.10
MarkupSafe==1.0
msrest==0.6.10
oauthlib==3.1.0
pycparser==2.19
requests==2.22.0
requests-oauthlib==1.3.0
six==1.13.0
urllib3==1.25.7
Werkzeug==0.14.1