Python:处理字符串

my_string = 'Hello, World!'

str1 = 'Hello'
str2 = 'World'
result = str1 + ' ' + str2  # 使用加号运算符
print(result)  # 输出: Hello World

str_list = ['Hello', 'World']
result = ' '.join(str_list)  # 使用join()方法
print(result)  # 输出: Hello World

my_string = 'Hello, World!'
length = len(my_string)
print(length)  # 输出: 13

my_string = 'Hello, World!'
sub_string = my_string[7:12]
print(sub_string)  # 输出: World

my_string = 'Hello, World!'
index = my_string.find('World')
print(index)  # 输出: 7

index = my_string.index('World')
print(index)  # 输出: 7

my_string = 'Hello, World!'
new_string = my_string.replace('World', 'Python')
print(new_string)  # 输出: Hello, Python!

my_string = 'Hello, World!'
string_list = my_string.split(', ')
print(string_list)  # 输出: ['Hello', 'World!']