content = """
	寻隐者[email protected]不遇
	朝代：唐asdf12dsa#abc.com代
	作[email protected]者：贾岛
	松下问童子，言师python-abc@163com采药去。
	只在[email protected]此山中，云深不知处。
"""

# [email protected]

import re

pattern = re.compile(r"""
	[a-zA-Z0-9_-]+
	@
	[a-zA-Z0-9]+
	\.
	[a-zA-Z]{2,4}
""", re.VERBOSE)

results = pattern.findall(content)

for result in results:
	print(result)