getting error during initialization

[DeepInEvil]

from bengali_analyzer import bengali_analyzer as bla

Error:
Traceback (most recent call last):

File "/opt/conda/lib/python3.7/site-packages/IPython/core/interactiveshell.py", line 3552, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)

File "/tmp/ipykernel_17/3314749499.py", line 1, in
from bengali_analyzer import bengali_analyzer as bla

File "/opt/conda/lib/python3.7/site-packages/bengali_analyzer/init.py", line 1, in
from .bengalianalyzer import *

File "/opt/conda/lib/python3.7/site-packages/bengali_analyzer/bengalianalyzer.py", line 18, in
from .normalizer import normalize_assets

File "/opt/conda/lib/python3.7/site-packages/bengali_analyzer/normalizer/normalize_assets.py", line 50
while chunk := f.read(CHUNK_SIZE):
^
SyntaxError: invalid syntax

Environment: Python 3.7 ( I guess this operator is only available in 3.9)