python批量替换字符串

你可以使用Python的字符串方法replace()来批量替换字符串。replace()方法接受两个参数，第一个参数是要被替换的子字符串，第二个参数是要替换成的新字符串。下面是一个示例代码：

def batch_replace_string(original_string, replacements):
    for old_str, new_str in replacements.items():
        original_string = original_string.replace(old_str, new_str)
    return original_string

replacements = {
    "apple": "orange",
    "banana": "grape",
    "cherry": "melon"
}

original_string = "I like apple, banana, and cherry."
new_string = batch_replace_string(original_string, replacements)
print(new_string)

这段代码会将原始字符串中的"apple"替换成"orange"，"banana"替换成"grape"，"cherry"替换成"melon"，然后输出结果为："I like orange, grape, and melon."