By default, you can't. When importing a file, Python only searches the current directory, the directory that the entry-point script is running from, and
sys.path which includes locations such as the package installation directory (it's actually a little more complex than this, but this covers most cases).
However, you can add to the Python path at runtime:
# some_file.py import sys # insert at 1, 0 is the script path (or '' in REPL) sys.path.insert(1, '/path/to/application/app/folder') import file