What are the string cutting and splicing methods in Python?

There are many methods of string cutting and splicing in Python. The following will introduce the commonly used methods and attach code examples.

1. Use the split() method for string cutting
   The split() method can cut a string into multiple parts according to the specified delimiter and return a list containing the cut parts.

str1 = "Hello, World!" parts = str1.split(",") # 使用逗号进行切割 print(parts) # 输出：['Hello', ' World!']

2. Use the join() method for string splicing
   The join() method can connect the string elements of a list and return a spliced string.

parts = ['Hello', 'World!'] str1 = ", ".join(parts) # 使用逗号和空格进行拼接 print(str1) # 输出：Hello, World!

3. Use slicing for string cutting and splicing
   You can use the slicing operator (:) to cut and splice strings.

str1 = "Hello, World!" part1 = str1[:5] # 切割前五个字符 part2 = str1[7:] # 从第七个字符开始切割 print(part1) # 输出：Hello print(part2) # 输出：World!

str1 = "Hello" str2 = "World!" str3 = str1 + ", " + str2 # 使用加号进行拼接 print(str3) # 输出：Hello, World!

4. Use the format() method for string splicing
   The format() method can be used to format a string and replace the placeholders in the string with the specified value .

name = "John" age = 25 str1 = "My name is {} and I am {} years old.".format(name, age) print(str1) # 输出：My name is John and I am 25 years old.

5. Use f-string for string concatenation (Python 3.6 or above)
   f-string is a simpler string concatenation method, using curly brackets and variable names Embed variable values into strings.

name = "John" age = 25 str1 = f"My name is {name} and I am {age} years old." print(str1) # 输出：My name is John and I am 25 years old.

The above are the commonly used string cutting and splicing methods in Python. You can choose the appropriate method according to actual needs.

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