26-May-2026 Self-Practice

a = [1]
b = [1]
c = a
print(id(a))
print(id(b))
print(id(c))
x = [1,2,3,4]
print(id(x))
print(x)

from math import pi, sqrt
print(pi, sqrt)

print("************ list *******************")
a = [1, 2, 3, 4, 5, 6, 7, 8, 9]
a.sort()
print(a)
a.append([10, 11])
print(a)
a.insert(3, 10)
a[0] = 9
print(a)
del a[0]
print(a)
print(a[20:0:-4])
print(a[9:0:-4])

print (a)
print("************ list *******************")


print("************ tuple *******************")
a = (1, 2, 3, 4, 5, 6, 7, 8, 9)
b = list(a)
b.append([10, 11])
a = tuple(b)
print(a)
c = a[::]
print(c)
print("************ tuple *******************")

print("************ set *******************")
a = [{"name": "John", "age" : 10}, {"name": "Peter", "age" : 20}]
print(a[0]["name"])
print(a[0].get("name"))
print(a[0]["age"])
print(a[1]["name"])
print(a[1]["age"])
print("************ set *******************")


print("************ try split for list, tuple, set from String *******************")
a = '1234567'
print(list(a))
print([*a])    #unordered set
print({*a})    #unordered set
print(*a)    #unordered set
b = [*a]
c = tuple(a)
d = {*a}
print(b)
print(c)
print(d)
print("************ try split for list, tuple, set from String *******************")

a = 3 % 2
b = 3** 2
print(a)
print(b)

a = input("Please input")
b = float(a) / 3
print(f"b is {b} end")
print(f"b is {b:<12.3f}".strip() + " end")


words = ["apple", "bat", "cherry", "dog", "elderberry"]
#a = words[0::2]
x = []
for i in words:
    if len(i)>=4:
        x.append(i.upper())
print(x)