Python 导入 - 许多模块无法识别

Question

I am trying to follow a tutorial book called "Data visualization with Python and Javascript" and am running into many issues importing modules used in the book. I have made sure to do "pip install" on as many of the packages used as possible, and have successfully done it for packages such as SQLAlchemy and matplotlib.

However, when I import modules from SQLAlchemy and even dateutil that are used in the tutorial, I receive an import error, "ImportError: No module named {module}" On the following lines of code:

from dateutil import parser
from SQLAlchemy import create_engine

This has occurred often enough with different modules that I am beginning to get concerned I can no longer actually follow the tutorial. I had to skip a whole section of how to use SQLAlchemy. Furthermore, SQLAlchemy is properly installed:

Requirement already up-to-date: sqlalchemy in c:\users\{user}\appdata\local\continuum\miniconda3\lib\site-packages (1.2.15)

What obvious thing am I missing here that needs to happen for me to use these packages and modules?

EDIT:

python --version
Python 3.7.1
pip --version
pip 18.1 from C:\Users\{user}\AppData\Local\Continuum\miniconda3\lib\site-packages\pip (python 3.7)

However, I am using Anaconda for a virtual environment, and PyCharm as my IDE. I have included a screenshot of the projects interpreter for a good measure. Project Interpreter

Furthermore, I have checked that I have pip installed it on both the root and the environment. Root Environment

Answer 1

I think, you have multiple python versions installed.(2.* | 3.*) You are installing packages in one python version and using another python version.

EDIT: You can use pip2 install modulename for python2 and pip3 install modulename for python3