Python hexadecimal conversion (read binary files only)

Binascii module:

It contains a function that converts binary values into hexadecimal values, which can also be converted in turn. # Binary_value is a binary value, not a string or 1010 of the int type.

 
Binascii. b2a_hex (binary_value) # binary_value can be obtained by reading binary files> '89 '<type STR>
 

Builtin functions provided by Python:

Bin (Num) decimal value ===" binary string

 
Bin (10)> '0b1010' <type, STR>
 

Oct (Num) decimal value ===" octal string

 
Oct (10)> '012' <type, STR>
 

Hex (Num) decimal value ===" hexadecimal string

 
Hex (20)> '0x14' <type, STR>
 

INT (STR, base) Other hexadecimal string = "decimal value. Base indicates the hexadecimal value of str. If it is 2, STR is binary, the default base is decimal.

 
INT ('20')> 20 <type, int> int ('10', 2)> 2 <type, int> int ('10', 8)> 8 <type, int> int ('20', 10)> 20 <type, int> int ('20', 16)> 32 <type, int>
 

Character and number conversion functions:

CHR (INT) integer to character

 
CHR (65)> 'A', <type, STR>
 

Ord (CHR) character to integer

 
Ord ('A')> 97, <type, int>
 

Finally, an example of reading the binary content of an image file is provided:

#! /Usr/bin/ENV Python # encoding: utf-8import binascii FH = open (r 'C: \ temp \ IMG \ 2012517165556.png ', 'rb') A = FH. read () # print 'raw: ', 'A', type (a) hexstr = binascii. b2a_hex (a) # obtain a hexadecimal number # print 'hex: ', hexstr, type (hexstr) bsstr = Bin (INT (hexstr, 16) [2:] print 'bin: ', bsstr, type (bsstr)
 

Why is the screen-flushing effect a little tricky?