csv

问题 I have the following code which I am using to create and add a new row to a csv file. def calcPrice(data): fieldnames = ["ReferenceID","clientName","Date","From","To","Rate","Price"] with open('rec2.csv', 'a') as csvfile: writer = csv.DictWriter(csvfile, fieldnames=fieldnames) writer.writeheader() writer.writerow(data) return However, it as the header as a new row as well. How can I prevent this? Here's a link to the gist with the whole code: https://gist.github.com/chriskinyua

问题 I'm developing a website that consists of different songs. These songs contain different attributes, one of them is a midi file that I upload through the fileField field of django. When I add a song with these attributes using a form, I call a script that generates a csv file with midi attribute information. The problem is that I would like to assign this resulting csv file directly to another Filefield, i.e. when I create the form, this csv is assigned to a fileField, just after submitting

问题 I have the following code which I am using to create and add a new row to a csv file. def calcPrice(data): fieldnames = ["ReferenceID","clientName","Date","From","To","Rate","Price"] with open('rec2.csv', 'a') as csvfile: writer = csv.DictWriter(csvfile, fieldnames=fieldnames) writer.writeheader() writer.writerow(data) return However, it as the header as a new row as well. How can I prevent this? Here's a link to the gist with the whole code: https://gist.github.com/chriskinyua

问题 I want to compile a CSV file into my Binary so that when I run my EXE application it does not need the required CSV file in the folder, and has the CSV files data within the EXE already. For instance I have multiple CSV files with 2 columns and 150+ rows of strings which I want to, at runtime, be parsed into a C++ map. When I use this application I dont want it to be in a folder with multiple CSV files, rather just the EXE which can be more portable. If the data in these CSV files had to

问题 I want to merge rows within a condition. If the row is less than 20 characters long, combine that row with the previous row. But I have two columns and I want to apply the condition in the code in the second column, if any row contains less than 20 characters remove row for two columns. I got help here already to merge rows but if I had one column now I have different requirements. I have two columns and want to apply the operation in the second row, any row have less than 20 char merge this

问题 I have a large csv file containing data like: 2018-09, 100, A, 2018-10, 50, M, 2018-11, 69, H,.... and so on. (continuous stream without separate rows) I would want to convert it into dataframe, which would look something like Col1 Col2 Col3 2018-09 100 A 2018-10 50 M 2018-11 69 H This is a simplified version of the actual data. Please advice what would be the best way to approach it. Edit: To clarify, my csv file doesn't have separate lines for each row. All the data is on one row. 回答1: One

问题 I want to write a function to attach a csv file to an E-Mail with HTML text. Everything works fine. I sends the E-Mail with the text and the attachment with the right information. Only the data format is wrong. I tried different varieties in MIMEBASE('application', 'octet-stream') . This one gives me a '.bin' data which I cannot open on macOS. Others gave me a plain text data which included the right data, but I don't wanna copy it manually into a csv. Does someone have a solution how I get

问题 I'am trying to extract the variable "swh_ku" from multiple NetCDF files together with their corresponding latitude and longitude values into csv files using a polygon shapefile or it's extent. I'm working with Jason-1 global altimetry swath data but I only need the data for the domain represented by the shapefile. I just need help with some lines of code that would complete the working code bellow so I can extract only the data for the region I'm interested in. I've tried several software

问题 int main() { auto base_dir = fs::current_path(); auto dataset_1 = data_names_1; auto dataset_name = base_dir / "NAimg_20101026_145727.csv"; //double data[10][3]; std::ifstream file(dataset_name); matrix<DataType> data_length; file >> data_length; auto pre_num_row = data_length.nc(); static const int num_row = 73;//data_length.nr(); static const int num_column = 74496; //data_length.nc(); std::cout << num_row << "\n"; std::cout << num_column << "\n"; double data[73][74496]; for (int row = 0;

问题 My csv contain date,name,department 2020-2-4,sachith,{dep_name:computer,location:2323,3434} 2020-2-5,nalaka,{dep_name:engineering,location:3343,5454} final csv should be like : date,name,dep_name,lat,lot 2020-2-4,sachith,computer,2323,3434 2020-2-5,nalaka,engineering,3343,5454 here lat,lot are taken from location:3343,5454 data. I have tried to use UpdateRecord processor for this. In it has some ${field.value:join(','):substringAfter('dep_name:')} But its not working. How can I complete this