pack

问题 I have a set of data that represents a hardware structure that I need to manipulate in python. The real structure is 4 KB in size...I'll just whip up a quick example: Byte(s) Value 0-1 0x0102 2-3 0x0304 4-23 "AStrWith20Characters" 24-63 "WoahThisStringHas40CharactersItIsHuge!!!" 64-71 "Only8Chr" 72-74 0x050607 74 0x08 75-127 0x00 (padding) The idea is I pack this structure up into a list of 32 bit Ints, pass the list off to another function, and that function then writes the whole shebang out

问题 I am creating virtualbox redhat box with packer with the template attached below. Everything is fine except that when the host is created and rebooted, the eth0 network adapter does not start as it is created with ONBOOT=no in /etc/sysconfig/network-scripts. However, if I open the UI of the box and manually trigger ifup eth0, it starts fine, ssh becomes available and the process completes as expected. However, I need to use it in a jenkins pipeline so there is no option someone can go and

问题 I am new to perl. I need to write a golang code which read UDP package sent from a perl UDP socket client. Basically, the perl client packs data using the template "N/a* N/a*" like the following: $them = pack($sockaddr,&AF_INET, $data_port, $broadaddr); $actual_data = pack("N/a* N/a*", $string1, $string2); send(S,$actual_data,0,$them) || die $!; My question is: What does "N/a* N/a*" actually means? A simple explanation would be helpful. How two strings are actually packed? How i can write a

问题 I have a file hashed to a standard md5 Hash Correction: OpenSSL Hashes are HEXDECIMAL representations. MD5 Hash: 57ED2E029BF9CA39383D2A671EF4FB50 I have a program that requires a byte encoding base64 md5 hash. MD5 BASE64 byte: 8se7isyX+S6Yei1Ah9AhsQ== How do you use pythons 'binascii' b2a methods to convert the standard MD5 hash to a Base64? The below is wrong. import binascii bin = binascii.a2b_uu('57ED2E029BF9CA39383D2A671EF4FB50') base = binascii.b2a_base64(bin) Output +>

问题 #!/usr/bin/env perl use warnings; use 5.012; my $var = 1 << 31; say unpack( "B*", pack( "N", $var ) ); # 10000000000000000000000000000000 How can I get with pack/unpack from my $var = 1 << 63; an output like this? # 1000000000000000000000000000000000000000000000000000000000000000 回答1: say unpack("B*", pack( "Q>", $var )); The > forces big-endian byte-order on the Q (unsigned 64-bit "quad") type. 来源： https://stackoverflow.com/questions/4672213/pack-unpack-litle-endian-64bit-question

问题 I'm attempting to center a button (self.HBu) within my frame. For some reason when I run this, the button sticks toward the bottom of the frame. What am I doing wrong? Snippet: frame = Tk.Frame(self).pack(ipadx=180, ipady=100) self.HBu = Tk.Button(frame, text='click', command=self.do_stuff) self.HBu.pack() 回答1: Are you aware that by default, pack places widgets at the top of a frame? There is no explanation for it being at the bottom, based on the code you posted. Try adding side="left" to

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . Using the PHP pack() function, I have converted a string into a binary hex representation: pack('H*', $SECURE_SECRET) How can I get the same result in Python? I tried struct.pack , but the result is not the same.

问题 C# - Loading image from file resource in different assembly I have a PNG image file which is stored in a project called SomeProject and displayed various times using XAML in that same project. In a different assembly, I now wish to access that same image. Previously I was simply specifying a relative path to the actual file which worked fine. However, when I build a release installer, the image files are packed into the SomeProject.DLL. Is there any easy way I can access the PNG file from

问题 The question is pretty self explanatory. I want to turn something like [true, true, false, true] into the following bitstring 1101. I assume I need to use Array.pack, but I can't figure out exactly how to do this. 回答1: It really depends on how exactly you want to represent the boolean Array. For [true, true, false, true] , should it be 0b1101 or 0b11010000 ? I assume it's the former, and you may get it like this: data = [true, true, false, true] out = data .each_slice(8) # group the data into

问题 Im trying to pack data that resembles the following struct. Ultimately this needs to be of type NSData . typedef struct __attribute__((packed)) { UInt8 a; UInt8 b; UInt8 c[17]; } myStruct; If I try the following I get an error when assigning value to c . myStruct str = {}; str.a = 1; str.c = aByteArray; // `Array UInt8 [17] is not assignable.` How can pack data by either assigning values to myStruct or constructing its equivalent using output ? I think the following implementation would work