with open("est.txt","r",encoding="utf-8") as f:
r = f.readlines()
print(r[0]) # 读第一行
with open("est.txt","r",encoding="utf-8") as f:
r = f.readlines()
print(r[0]) # 读第一行
print(r[-1]) # 读最后一行
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python读取第一行,读取最后一行
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