environment/lib/python2.7/site-packages/IPython/core/prompts.py
def cwd_filt(depth):
    """Return the last depth elements of the current working directory.

    $HOME is always replaced with '~'.
    If depth==0, the full path is returned."""

    cwd = os.getcwdu().replace(HOME,"~")
    out = os.sep.join(cwd.split(os.sep)[-depth:])
    return out or os.sep
def cwd_filt(depth):
    """Return the last depth elements of the current working directory.

    $HOME is always replaced with '~'.
    If depth==0, the full path is returned."""

    cwd = os.getcwdu().replace(HOME,"~")
    out = os.sep.join(cwd.split(os.sep)[-depth:])
    return out or os.sep
Return the last depth elements of the current working directory.

    $HOME is always replaced with '~'.
    If depth==0, the full path is returned.