binary

来源： https://stackoverflow.com/questions/35399920/convert-floating-point-number-1864-78-to-binary-and-ieee-format

来源： https://stackoverflow.com/questions/63951360/partition-n-where-the-count-of-parts-and-each-part-are-a-power-of-2-and-part-si

来源： https://stackoverflow.com/questions/63951360/partition-n-where-the-count-of-parts-and-each-part-are-a-power-of-2-and-part-si

问题 I have an ascending list of integers e that starts from 0 and I would like to have a binary list b whose i -th element is 1 if and only if i belongs to e . For example, if e=[0,1,3,6] , then this binary list should be [1,1,0,1,0,0,1] , where the first 1 is because 0 is in e , the second 1 is because 1 is in e , the third 0 is because 2 is not in e , and so on. You can find my code for that below. My question is: is there something built-in in python for that? If not, is my approach the most

问题 I was trying to build an encryption program in python 2.7. It would read the binary from a file and then use a key to encrypt it. However, I quickly ran into a problem. Files like image files and executables read as hex values. However, text files do not using open(). Even if i run file=open("myfile.txt", "rb") out=file.read() it still comes out as just text. I'm on windows 7, not linux which i think may make a difference. Is there any way i could read the binary from ANY file (including text

问题 I'm having trouble with opening a file. Most examples read files into a String or read the entire file into a Vec . What I need is to read a file into chunks of a fixed size and store those chunks into an array ( Vec ) of chunks. For example, I have a file called my_file of exactly 64 KB size and I want to read it in chunks of 16KB so I would end up with an Vec of size 4 where each element is another Vec with size 16Kb (0x4000 bytes). After reading the docs and checking other Stack Overflow

问题 I'm having trouble with opening a file. Most examples read files into a String or read the entire file into a Vec . What I need is to read a file into chunks of a fixed size and store those chunks into an array ( Vec ) of chunks. For example, I have a file called my_file of exactly 64 KB size and I want to read it in chunks of 16KB so I would end up with an Vec of size 4 where each element is another Vec with size 16Kb (0x4000 bytes). After reading the docs and checking other Stack Overflow

问题 I'd like to use python read a large binary file in ieee big endian 64bit floating point format, but am having trouble getting the correct values. I have a working method in matlab, as below: fid=fopen(filename,'r','ieee-be'); data=fread(fid,inf,'float64',0,'ieee-be'); fclose(fid) I've tried the following in python: data = np.fromfile(filename, dtype='>f', count=-1) This method doesn't throw any errors, but the values it reads are extremely large and incorrect. Can anyone help with a way to

问题 I'd like to use python read a large binary file in ieee big endian 64bit floating point format, but am having trouble getting the correct values. I have a working method in matlab, as below: fid=fopen(filename,'r','ieee-be'); data=fread(fid,inf,'float64',0,'ieee-be'); fclose(fid) I've tried the following in python: data = np.fromfile(filename, dtype='>f', count=-1) This method doesn't throw any errors, but the values it reads are extremely large and incorrect. Can anyone help with a way to

问题 I am trying to add 1 to a byte array containing binary number. It works for some cases and not for others. I cannot convert my array to an integer and add one to it. I am trying to do the addition with the number in the array. If someone could please point me i where I am messing up on this! Test cases that have worked: 1111, 0, 11 EDIT: I understand how to do it with everyone's help! I was wondering if the binary number had the least significant bit at the first position of the array.