Maybe it's me did something wrong, my Pycharm cannot give underlines on questionable packages.
For example, if you create a python file from scratch and only put one line as below.
df = pd.read_csv('abc.csv')
This will not give any red lines below 'pd' or give hitns on abc.csv that does not exist.
Is it some where in my Pycharm settings to change?
By default, if you didn't import anything that adds pd to the namespace, PyCharm would underline pd and the warning text would be Unresolved reference 'pd'. If you're not getting that, you must have disabled it, or you're entering this text into a file other than a Python source file (like a .py).
Open your File - Settings..., use the search to look for inspection, and in the Inspections section, look for the Unresolved references inspection in the Python and make sure that it is checked.
