after del list , when I use it again, prompt 'not defined'.how could i delete its element,but not itself? except list.remove(val) ,are there other ways to delete list 's elements?
and , I wrote:
list1=[]
def method1():
global list1
list1=['a','b','c','d']
def method2():
list2=list1
list2.remove['a']
main():
global list1
method1()
method2()
print list1[0]
it prints 'b'.
How could I keep the list1 not to change when remove list2's elements?
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