J Jones questions

• sys.path vs. $PATH
• Anaconda Python 3.6 -- pythonw and python supposed to be equivalent?
• Updating a pandas DataFrame row with a dictionary
• Pandas: boolean indexing with 'item in list' syntax
• brew-installed Python not overriding system python
• Relative imports with unittest in Python
• Use None instead of np.nan for null values in pandas DataFrame
• Testing if a pandas DataFrame exists

J Jones answers