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List Operations Replace element(s)Differently
from string, a list can be modified. A list's element is identified with the
array syntax, in other words, with the same syntax as for the string. An assignment can replace one or more
items at once.
Examples : Replace an element  Replace several elements  >>> list=[ 1, 2, 3, 4] >>> list[0]=5 >>> print list [5, 2, 3, 4]  >>> list=[ 1, 2, 3, 4] >>> # Replace the two firsts >>> list[0:2]=[5, 6] >>> # Replace the 4th and add a 5th. >>> list[4:2]=[7, 8] >>> print list [5, 6, 3, 4, 7, 8]  Remove element(s)Even list's elements can be removed. That is done by assigns a empty list to the element.
Examples : Remove 1 element the third  Remove 2 elements the third and fourth  >>> list=[1, 2, 3, 4, 5] >>> list[2:3]=[] >>> print list [1, 2, 4, 5]  >>> list=[1, 2, 3, 4, 5] >>> list[2:4]=[] >>> print list [1, 2, 5]  Remove all elements after the fourth  Suppress from the first element up to the second.  >>> list=[1, 2, 3, 4, 5] >>> list[3:]=[] >>> print list [1, 2, 3]  >>> list=[1, 2, 3, 4, 5] >>> list[:2]=[] >>> print list [ 3, 4, 5]  Add or concatenate elementsThe
append() function adds element at the end of the list. Be care, how the list variable was initialized. See chapter Assign several variables in the same time.
Examples : Simple assignment  Multiple assignment  Assignment remove the link  >>> A=[] >>> B=[] >>> A.append(1) >>> B.append(2) >>> print A, B [1] [2]  >>> A=B=[] >>> A.append(1) >>> B.append(2) >>> print A, B [1, 2] [1, 2]  >>> A=B=[] >>> A=[3] >>> A.append(1) >>> B.append(2) >>> print A, B [3, 1] [2]  Add element can be done by addition.
Examples :
Simple assignment  Multiple assignment  Assignment remove the link  >>> A=[] >>> B=[] >>> A+=[1] >>> B+=[2] >>> print A, B [1] [2]  >>> A=B=[] >>> A+=[1] >>> B+=[2] >>> print A, B [1, 2] [1, 2]  >>> A=B=[] >>> A=[3] >>> A+=[1] >>> B+=[2] >>> print A, B [3, 1] [2] 

