OpenStack Study: shellfilter.py

**** CubicPower OpenStack Study ****

def shellfilter(value):

    """Replace HTML chars for shell usage."""

    replacements = {'\\': '\\\\',

                   '`': '\`',

                   "'": "\\'",

                   '"': '\\"'}

    for search, repl in replacements.items():

        value = value.replace(search, repl)

    return safestring.mark_safe(value)