029 python字符串的基本操作

# 通过索引
s1 = 'hello world'
print(s1[0])
print(s1[2])

# 分片
print(s1[6:9])
print(s1[6:])
print(s1[::2])
print(s1[::-1])

# 乘法
s2 = 'xyz'
print(10 * s2)
print(s2 * 10)

print('b' in s2)
print('y' in s2)
print('b' not in s2)

print(len(s1))
print(min(s2))
print(max(s2))

a = [1,2,3,0,6]
print(2 in a)
print(len(a))
print(min(a))
print(max(a))

print(10 * a)

a[0] = 20

# 字符串相当于由字符组成的元组

　　

h
l
wor
world
hlowrd
dlrow olleh
xyzxyzxyzxyzxyzxyzxyzxyzxyzxyz
xyzxyzxyzxyzxyzxyzxyzxyzxyzxyz
False
True
True
11
x
z
True
5
0
6
[1, 2, 3, 0, 6, 1, 2, 3, 0, 6, 1, 2, 3, 0, 6, 1, 2, 3, 0, 6, 1, 2, 3, 0, 6, 1, 2, 3, 0, 6, 1, 2, 3, 0, 6, 1, 2, 3, 0, 6, 1, 2, 3, 0, 6, 1, 2, 3, 0, 6]