ModuleNotFoundError: No module named 'forex_python'

As I was trying to practice building a Currency Converter python program, guided by one of the open resources, I installed forex-python and ensured it was installed:

$ pip freeze
certifi==2022.12.7
charset-normalizer==2.1.1
colorgram.py==1.2.0
forex-python==1.8
idna==3.4
Pillow==9.4.0
prettytable==3.5.0
prettyTables==1.1.5
requests==2.28.1
simplejson==3.18.1
urllib3==1.26.13
wcwidth==0.2.5

Then the code was copied/pasted without further modification:

from forex_python.converter import CurrencyRates

c = CurrencyRates()
amount = int(input("Enter the amount: "))
from_currency = input("From Currency: ").upper()
to_currency = input("To Currency: ").upper()
print(from_currency, " To ", to_currency, amount)
result = c.convert(from_currency, to_currency, amount)
print(result)
wcwidth==0.2.5

But the module was still missing; I even reinstalled forex-python several times.

Traceback (most recent call last):
  File "Project002_Real-time_CurrencyConverter.py", line 1, in <module>
    from forex_python.converter import CurrencyRates
ModuleNotFoundError: No module named 'forex_python'

I’ve searched on Google and couldn’t find suitable solutions,
am I missing anything here, please?

Updates: 07/01/2023
Thanks for all the comments!! It’s my first question; I sincerely appreciate all the feedback.

1. pip was installed under python3.11; after following the suggested commands for version check, my interpreter was python 3.9; I have shifted it to python 3.11. Just in case, I installed pip under python 3.9 too.

mac/~~$where python
python: aliased to /usr/bin/python3
mac/~~$where python3
/Library/Frameworks/Python.framework/Versions/3.11/bin/python3
/usr/bin/python3
mac/~~$python -m pip install forex-python 

I used PyCharm to run the code, and neither interpreter worked. The same message ModuleNotFoundError. But I did the same on VS Code, (checked interpreter, check python version), it worked finally.

Thank you all!