Python第二周 学习笔记（1）
s1 = 'string' s2 = "string2"s3 = '''this's a "String" '''
s4 = 'hello \n magedu.com'
s5 = r"hello \n magedu.com"
s6 = 'c:\windows\nt'
s7 = R"c:\windows\nt"
s8 = 'c:\windows\\nt'
sql = """select * from user where name='tom' """
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