9-Apr-2026 Class 4
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#a=[1,[2,3],4,5,6,7,8,9,['a','b','c']]
#print(a[8][1])
#a=[1,[2,3],4,[5,[[6],7]],8,9,['a','b','c']]
#print(a[3][1][0][0])
#a[0] = 10
#print(a)
#a[1] = 10
#print(a)
#a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16]
#print(a[10], a[-4])
#b=slice(0,7,1) # start, end-1, step
#print(type(b))
#print(a[b], a[0:7:1])
#print(a[b], a[0:15:7])
#x = 2
#y = 17
#z = 6
#b = slice(x,y,z) # start, end-1, step
#print("aaa")
#print(a[x:y:z])
#print("bbb")
#print(a[7:2:1])
#print(a[7:-1:1])
#print(a[7:-1:-1])
#print("ccc")
#print(a[-1:0:-4])
#print(a[15:0:-4])
#allow empty value and some functions
#print(a[-1::-1])
#print(a[:10]) # 0:10:1
#print(a[::5]) # 0:len(a):5
#print(a[0:15:1])
#print("ddd")
#del a[::5]
#print(a)
#a.remove(4)
#print(a)
#a = [1,2,3,4,5,4,6,7,8,9,10,11,12,13,14,15,16]
#a.remove(4)
#print(a)
#a.clear()
#print(a)
#a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16]
#a = []
#print(a)
#a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16]
#a.sort(reverse=True) # change original list
#print(a)
#print("eee")
#b = sorted(a)
#print(a)
#print(b)
#print("fff")
#a=[1,2,3,4,9,10,11,12,5,6,7,8,13,14,15]
#a.sort()
#print(a)
#b = sorted(a,reverse=True)
#print(a)
#print(b)
#a=[1,2,3,4,9,10,11,12,5,6,6,7,8,13,14,15]
#print(a.count(6), a.index(6))
#print(a.count(0), a.index(6))
#print(a.count(0), a.index(0)) #error appear for index 0 not in the list
#temp 8, for tuple
a = 1,2,3,4,9,10,11,12,5,6,6,8,13,14,15
print(a.count(0),a.index(6))
print(a[0])
#a[0]=10
#a.sort()
print(a)
b = sorted(a,reverse=True)
print(a)
print(b)
b = 1,
print(b)
b = ()
print(b, type(b))
a = {1,2,"a",3,4,"",9,10,"b",11,12,5,6,"a",6,8,13,14,15}
print(type(a))
print(a)
print("ggg")
a = [1,2,"a",3,4,"b",9,10,"b",11,12,5,6,"a",6,8,13,14,15]
#a = set(a)
#print(type(a))
#a = list(a)
a = list(set(a))
print(a)
a = {1,2,"a",3,4,"",9,10,"b",11,12,5,6,"a",6,8,13,14,15}
a.add(16)
print(a)
a.update(a, {17, 18})
print(a)
a = {1,2,3,4}
b = {3,4,5,6}
print(a | b)
print(a & b)
print(a - b)
print(a ^ b)
Python
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