How to use 'how to print even numbers in python' in Python

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def format_number():
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    print("=== format_number ===")
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    print('{:>2d}:{:>2d}'.format(3, 3))
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    print('{:>2d}:{:>2d}'.format(23, 3))
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    print('{:>2d}:{:>2d}'.format(123, 3))
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    print('-')
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    print('{:0>2d}:{:0>2d}'.format(3, 3))
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    print('{:0>2d}:{:0>2d}'.format(23, 3))
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    print('{:0>2d}:{:0>2d}'.format(123, 3))
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    print('-')
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    print('{:0<2d}:{:0<2d}'.format(3, 3))
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    print('{:0<2d}:{:0<2d}'.format(23, 3))
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    print('{:0<2d}:{:0<2d}'.format(123, 3))
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    print('-')
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    print('{:02d}:{:02d}'.format(3, 3))
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    print('{:02d}:{:02d}'.format(23, 3))
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    print('{:02d}:{:02d}'.format(123, 3))
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    print('-')
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    print('{:0<2d}:{:0<2d}'.format(3, 3))
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    print('{:0<2d}:{:0<2d}'.format(23, 3))
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    print('{:0<2d}:{:0<2d}'.format(123, 3))
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    print('-')
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    print('{:.2f}'.format(123.45678))   # 会自动四舍五入
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    print('{:.2%}'.format(0.12345))     # 用百分号的形式
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    print('-')
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    print("{0:b}".format(0x1234))       # 最前面的 0 是参数的标号
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    print("{0:16b}".format(0x1234))
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    print("{0:016b}".format(0x1234))
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    print('-')
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    print("{:x}".format(2 ** 4 - 1))
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    print("{:x}".format(2 ** 8 - 10))
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    print("{:x}".format(2 ** 16 - 1))
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    print('-')
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    print("{:06x}".format(2 ** 4 - 1))
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    print("{:06x}".format(2 ** 8 - 10))
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    print("{:06x}".format(2 ** 16 - 1))