binaryfiles

问题 I am reading data from a binary .out file using a python module "SWMMToolbox." The command to read the infilration time series for RG1 from the file.out is as follows: x = !swmmtoolbox extract 'file.out' subcatchment,RG1,Infiltration_loss See link for details about swmmtoolbox. The data type of 'x' is a 'IPython.utils.text.SList' The data looks like this: I would like to import this Slist into pandas, but am having trouble. I want to get the datetime string as one column and the value after

问题 I am reading data from a binary .out file using a python module "SWMMToolbox." The command to read the infilration time series for RG1 from the file.out is as follows: x = !swmmtoolbox extract 'file.out' subcatchment,RG1,Infiltration_loss See link for details about swmmtoolbox. The data type of 'x' is a 'IPython.utils.text.SList' The data looks like this: I would like to import this Slist into pandas, but am having trouble. I want to get the datetime string as one column and the value after

问题 I would like to skip a few characters in a binary file between two istream getlines. What is the best way to do it? Shell I just read into a dummy variable with istream::read? Or shell I use n = istream::tellg and istream::seekg = n + 1000? 回答1: You can simply move a stream position relative to the current position by using the std::ios::cur position argument: std::ifstream f("myfile.txt"); // current position 0 f.seekg(200, std::ios::cur); // relative seek Negative values are also permitted.

问题 I would like to skip a few characters in a binary file between two istream getlines. What is the best way to do it? Shell I just read into a dummy variable with istream::read? Or shell I use n = istream::tellg and istream::seekg = n + 1000? 回答1: You can simply move a stream position relative to the current position by using the std::ios::cur position argument: std::ifstream f("myfile.txt"); // current position 0 f.seekg(200, std::ios::cur); // relative seek Negative values are also permitted.

问题 We can convert any digital file into binary file. I have a text file of 1MB, I want to convert it to a binary string and see the output as a binary number and the vice versa, in other words, if I have binary number, I want to convert it to a text file. How could I do that in Python? is there a standard way to do this? Now in this forum there are some posts (1,2,3, 4 ) on this but none of them answer properly to my question. 回答1: See https://docs.python.org/3/library/codecs.html#standard

问题 We can convert any digital file into binary file. I have a text file of 1MB, I want to convert it to a binary string and see the output as a binary number and the vice versa, in other words, if I have binary number, I want to convert it to a text file. How could I do that in Python? is there a standard way to do this? Now in this forum there are some posts (1,2,3, 4 ) on this but none of them answer properly to my question. 回答1: See https://docs.python.org/3/library/codecs.html#standard

问题 I am willing to store objects in a database. The purpose is to be able to read / write these objects with the program. The requirements are the following: Objects can be complex using Qt classes such as QList , QString ... or even can contain other objects that use QObjects The database should not be readable or modified by human (no text file, and if I use sqlite database, it has to be encrypted in a way) I should be able to remove, read an object by its name and count the number of objects

问题 I am willing to store objects in a database. The purpose is to be able to read / write these objects with the program. The requirements are the following: Objects can be complex using Qt classes such as QList , QString ... or even can contain other objects that use QObjects The database should not be readable or modified by human (no text file, and if I use sqlite database, it has to be encrypted in a way) I should be able to remove, read an object by its name and count the number of objects

问题 I am writting some objects in a binary file and I would like to read them back. To explain you what I am trying to do, I prepared a simple example with a class User that contains the QString name and QList name of childrens. Please see the code below. #include "QString" #include "QFile" #include "QDataStream" #include "qdebug.h" class User { protected: QString name; QList<QString> childrens; public: QString getName(){ return name;} QList<QString> getChildrens(){ return childrens;} void

问题 I am writting some objects in a binary file and I would like to read them back. To explain you what I am trying to do, I prepared a simple example with a class User that contains the QString name and QList name of childrens. Please see the code below. #include "QString" #include "QFile" #include "QDataStream" #include "qdebug.h" class User { protected: QString name; QList<QString> childrens; public: QString getName(){ return name;} QList<QString> getChildrens(){ return childrens;} void