parameters: (key, val, env)
docstring: Validator to check if Path exists
docstring_summary: Validator to check if Path exists
docstring_tokens: Validator to check if Path exists
function: def PathExists(key, val, env):
          """Validator to check if Path exists"""
          if not os.path.exists(val):
              m = 'Path for option %s does not exist: %s'
              raise SCons.Errors.UserError(m % (key, val))
function_tokens: def PathExists ( key , val , env ) : if not os . path . exists ( val ) : m = 'Path for option %s does not exist: %s' raise SCons . Errors . UserError ( m % ( key , val ) )