'''字符串分割'''
"a@b".split("@")
'''对列表中每个元素进行字符串分割
取关键词前半部分'''
list(x.split("@")[0] for x in ["a@b", "c@d"])
'''字符串分割'''
"a@b".split("@")
'''对列表中每个元素进行字符串分割
取关键词前半部分'''
list(x.split("@")[0] for x in ["a@b", "c@d"])
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