Python String Basics: Common Techniques and Examples

1. String declaration : A string can be defined using single quotes ('...'), double quotes ("..."), triple single quotes ('''...''' ), or triple double quotes ("""..."""). Example code shows variables a, b, c, d and prints them, producing hello world 床前明月光 疑是地上霜.

2. Embedding quotes : When the outer delimiters are single quotes, inner quotes must be double, and vice versa. Example n = "i say:'my name is jack'" and m = 'i say:"my name is nini"' print i say:'my name is jack' and i say:"my name is nini" respectively.

3. Escape characters : The backslash removes the special meaning of the following character. \' escapes a single quote, \" escapes a double quote, \n creates a newline, and \t creates a tab. Examples include e = "你\"好吗？", f = "欢迎学习\n Python", g = "今天天气\t很晴朗！", whose printed outputs are 欢迎学习, Python, and 今天天气 很晴朗 respectively.

4. Raw strings and formatted strings : Prefixing a string with r creates a raw string where backslashes are treated literally, e.g., h = r"i am a \teacher" prints i am a \teacher. Prefixing with f enables expression interpolation using {}. Example name = "张三", age = "22", print(f"我的姓名是：{name},年龄是：{age}") outputs 我的姓名是：张三,年龄是：22.