Python Replace Characters in String

To replace characters in a string, you can use the replace() method of the string. This method takes two parameters, the first one is the character or substring to be replaced, and the second one is the character or substring to replace it with.

Here is a simple example:

# 定义一个字符串
s = "hello world"

# 将字符串中的空格替换为逗号
new_s = s.replace(" ", ",")

print(new_s)  # 输出: hello,world

In the example above, we replaced the spaces in the string with commas. You can also replace them with other characters or substrings, as long as you use the replace() method in the same syntax.