Python Notes

Configuration

1. Use pip3 to install packages for python3.7 while use pip for python3.6.
2. Install a certain package to the designated postion:

   1	pip install -t /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages (package name)

3. See the path concerning one certain version of python:>import sys print(sys.path)
4. Get the list of modules in one version of python:>help(modules)

Programming Errors

1. >arrayOfLines = fr.readlines(fr)
2. >mat = empty(3, 2)
3. When showing syntaxError, check the parenthesis.

Python Notes

1. reload is no longer used in python3, to do this, we need to import importlib first.>import importlib importlib.reload(module)
2. os.path.dirname(__file__) works in .py file but not in ipython or Jupyter notebook. In Jupyter notebook, directly use the relative path.