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進(jìn)行協(xié)議解析時(shí)，總是會(huì)遇到各種各樣的數(shù)據(jù)轉(zhuǎn)換的問(wèn)題，從二進(jìn)制到十進(jìn)制，從字節(jié)串到整數(shù)等等

廢話不多上，直接上例子

整數(shù)之間的進(jìn)制轉(zhuǎn)換:

10進(jìn)制轉(zhuǎn)16進(jìn)制: hex(16) ==> 0x10

16進(jìn)制轉(zhuǎn)10進(jìn)制: int(‘0x10’, 16) ==> 16

類(lèi)似的還有oct()， bin()

——————-

字符串轉(zhuǎn)整數(shù):

10進(jìn)制字符串: int(’10’) ==> 10

16進(jìn)制字符串: int(’10’, 16) ==> 16

16進(jìn)制字符串: int(‘0x10’, 16) ==> 16

——————-

字節(jié)串轉(zhuǎn)整數(shù):

轉(zhuǎn)義為short型整數(shù): struct.unpack(‘<hh’, bytes(b’x01x00x00x00′)) ==> (1, 0)

轉(zhuǎn)義為long型整數(shù): struct.unpack(‘<L’, bytes(b’x01x00x00x00′)) ==> (1,)

——————-

整數(shù)轉(zhuǎn)字節(jié)串:

轉(zhuǎn)為兩個(gè)字節(jié): struct.pack(‘<HH’, 1,2) ==> b’x01x00x02x00′

轉(zhuǎn)為四個(gè)字節(jié): struct.pack(‘<LL’, 1,2) ==> b’x01x00x00x00x02x00x00x00′

——————-

字符串轉(zhuǎn)字節(jié)串:

字符串編碼為字節(jié)碼: ’12abc’.encode(‘a(chǎn)scii’) ==> b’12abc’

數(shù)字或字符數(shù)組: bytes([1,2, ord(‘1’),ord(‘2′)]) ==> b’x01x0212’

16進(jìn)制字符串: bytes().fromhex(‘010210′) ==> b’x01x02x10’

16進(jìn)制字符串: bytes(map(ord, ‘x01x02x31x32′)) ==> b’x01x0212’

16進(jìn)制數(shù)組: bytes([0x01,0x02,0x31,0x32]) ==> b’x01x0212′

——————-

字節(jié)串轉(zhuǎn)字符串:

字節(jié)碼解碼為字符串: bytes(b’x31x32x61x62′).decode(‘a(chǎn)scii’) ==> 12ab

字節(jié)串轉(zhuǎn)16進(jìn)制表示,夾帶ascii: str(bytes(b’x01x0212′))[2:-1] ==> x01x0212

字節(jié)串轉(zhuǎn)16進(jìn)制表示,固定兩個(gè)字符表示: str(binascii.b2a_hex(b’x01x0212′))[2:-1] ==> 01023132

字節(jié)串轉(zhuǎn)16進(jìn)制數(shù)組: [hex(x) for x in bytes(b’x01x0212′)] ==> [‘0x1’, ‘0x2’, ‘0x31’, ‘0x32’]

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