PythonStudy——列表的常用操作 List of common operations

s1 = [1, 3, 2]
print(s1[0])
print(s1[-1])

s2 = [1, 2, 3]
print(s2 + s2)
print(s2 * 2)
print(s2)

s3 = [3, 4, 1, 2, 5]
print(len(s3))

s4 = [3, 4, 1, 2, 5]
new_s4 = s4[::-1]
print(new_s4)
new_s4 = s4[1:4:]
print(new_s4)
new_s4 = s4[-2:-5:-1]
print(new_s4)

s5 = [3, 4, ‘1‘, 2, 5]
print(‘1‘ in s5)
print(1 in s5)
print(5 not in s5)

for v in s5:
    print(v, type(v))

for v in s5:
    if isinstance(v, int):
        print(v, end=‘ ‘)