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Python:根据替换字典/替换映射替换字符串列表中的匹配项

Python中可以使用替换字典或替换映射来替换字符串列表中的匹配项。替换字典是一个包含键值对的字典,其中键是要替换的字符串,值是替换后的字符串。替换映射是一个函数或lambda表达式,它接受一个参数并返回替换后的字符串。

下面是一个示例代码,演示如何使用替换字典和替换映射来替换字符串列表中的匹配项:

代码语言:python
复制
def replace_items(string_list, replace_dict):
    replaced_list = []
    for string in string_list:
        replaced_string = replace_dict.get(string, string)
        replaced_list.append(replaced_string)
    return replaced_list

def replace_items_with_mapping(string_list, replace_mapping):
    replaced_list = []
    for string in string_list:
        replaced_string = replace_mapping(string)
        replaced_list.append(replaced_string)
    return replaced_list

# 使用替换字典替换字符串列表中的匹配项
string_list = ['apple', 'banana', 'orange']
replace_dict = {'apple': 'fruit', 'banana': 'fruit'}
replaced_list = replace_items(string_list, replace_dict)
print(replaced_list)  # 输出: ['fruit', 'fruit', 'orange']

# 使用替换映射替换字符串列表中的匹配项
string_list = ['apple', 'banana', 'orange']
replace_mapping = lambda string: string.upper()
replaced_list = replace_items_with_mapping(string_list, replace_mapping)
print(replaced_list)  # 输出: ['APPLE', 'BANANA', 'ORANGE']

在上述示例中,我们定义了两个函数replace_itemsreplace_items_with_mapping来实现替换操作。replace_items函数使用替换字典来替换字符串列表中的匹配项,replace_items_with_mapping函数使用替换映射来替换字符串列表中的匹配项。

对于替换字典的例子,我们将'apple'替换为'fruit',将'banana'替换为'fruit',并保持'orange'不变。最后输出的替换后的字符串列表为['fruit', 'fruit', 'orange']

对于替换映射的例子,我们使用lambda表达式将字符串转换为大写字母。最后输出的替换后的字符串列表为['APPLE', 'BANANA', 'ORANGE']

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