44 lines
1.1 KiB
Python
44 lines
1.1 KiB
Python
from base64 import decode
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def write_bin_file(bin_path):
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with open(bin_path, 'wb') as f:
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f.write(b'Hello BinFile')
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if __name__ == "__main__":
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path = "5.文件与IO/4.bin_file.bin"
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write_bin_file(path)
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# 如果想要打开二进制文件，那就需要做'rb'模式
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with open(path, 'rb') as f:
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print(f.read())
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# 在打印的时候也有差异，要记得先utf-8转码，不然出来的是ascii
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a = b'Hello BinFile'
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for i in a:
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print(i, end=' ')
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print()
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for i in a.decode('utf-8'):
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print(i, end='')
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print()
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# C语言结构体和数组这种自带缓冲区接口的东西，可以直接读写文件，而不用先用encoder编码
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import array
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a = array.array('i', [0, 1, 2, 3, 4, 5, 6, 7, 8, 9])
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# 往文件里写array
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with open(path, 'wb') as f:
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f.write(a)
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# 直接把bin array从文件里薅出来塞到b的缓冲区
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b = array.array('i', [0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
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with open(path, 'rb') as f:
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f.readinto(b)
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print(b)
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# 但是这么干有风险，要谨慎应对
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