def cdr(ol,**kwargs):
    '''
        from elist.elist import *
        ol=[1,2,3,4]
        id(ol)
        new = cdr(ol)
        new
        id(new)
        ####
        ol=[1,2,3,4]
        id(ol)
        rslt = cdr(ol,mode="original")
        rslt
        id(rslt)
    '''
    if('mode' in kwargs):
        mode = kwargs['mode']
    else:
        mode = "new"
    if(mode == "new"):
        cpol = copy.deepcopy(ol)
        return(cpol[1:])
    else:
        ol.pop(0)
        return(ol)
def cdr(ol,**kwargs):
    '''
        from elist.elist import *
        ol=[1,2,3,4]
        id(ol)
        new = cdr(ol)
        new
        id(new)
        ####
        ol=[1,2,3,4]
        id(ol)
        rslt = cdr(ol,mode="original")
        rslt
        id(rslt)
    '''
    if('mode' in kwargs):
        mode = kwargs['mode']
    else:
        mode = "new"
    if(mode == "new"):
        cpol = copy.deepcopy(ol)
        return(cpol[1:])
    else:
        ol.pop(0)
        return(ol)
def cdr ( ol , * * kwargs ) : if ( 'mode' in kwargs ) : mode = kwargs [ 'mode' ] else : mode = "new" if ( mode == "new" ) : cpol = copy . deepcopy ( ol ) return ( cpol [ 1 : ] ) else : ol . pop ( 0 ) return ( ol )
from elist.elist import *
        ol=[1,2,3,4]
        id(ol)
        new = cdr(ol)
        new
        id(new)
        ####
        ol=[1,2,3,4]
        id(ol)
        rslt = cdr(ol,mode="original")
        rslt
        id(rslt)
from elist . elist import * ol = [ 1 2 3 4 ] id ( ol ) new = cdr ( ol ) new id ( new ) #### ol = [ 1 2 3 4 ] id ( ol ) rslt = cdr ( ol mode = original ) rslt id ( rslt )