csv

问题 A lot of questions have been already asked about this topic on SO. (and many others). Among the numerous answers, none of them was really helpful to me so far. If I missed the useful one, please let me know. I simply would like to read a CSV file with pandas into a dataframe. Sounds like a simple task. My file Test.csv 1,2,3,4,5 1,2,3,4,5,6 ,,3,4,5 1,2,3,4,5,6,7 ,2,,4 My code: import pandas as pd df = pd.read_csv('Test.csv',header=None) My error: pandas.errors.ParserError: Error tokenizing

问题 A lot of questions have been already asked about this topic on SO. (and many others). Among the numerous answers, none of them was really helpful to me so far. If I missed the useful one, please let me know. I simply would like to read a CSV file with pandas into a dataframe. Sounds like a simple task. My file Test.csv 1,2,3,4,5 1,2,3,4,5,6 ,,3,4,5 1,2,3,4,5,6,7 ,2,,4 My code: import pandas as pd df = pd.read_csv('Test.csv',header=None) My error: pandas.errors.ParserError: Error tokenizing

问题 I'm making a "Download" controller using Symfony 2, that has the sole purpose of sending headers so that I can force a .csv file download, but it isn't working properly. $response = new Response(); $response->headers->set('Content-Type', "text/csv"); $response->headers->set('Content-Disposition', 'attachment; filename="'.$fileName.'"'); $response->headers->set('Pragma', "no-cache"); $response->headers->set('Expires', "0"); $response->headers->set('Content-Transfer-Encoding', "binary");

问题 Because of the memory error, i have to split my csv files. I did research it. I found it from one of the stack overflow user who is Aziz Alto. This is his code. csvfile = open('#', 'r').readlines() filename = 1 for i in range(len(csvfile)): if i % 10000000 == 0: open(str(filename) + '.csv', 'w+').writelines(csvfile[i:i+10000000]) filename += 1 It works well but for second file, the code did not add header which is very important for me. My question is that How can I add header for second file

问题 Because of the memory error, i have to split my csv files. I did research it. I found it from one of the stack overflow user who is Aziz Alto. This is his code. csvfile = open('#', 'r').readlines() filename = 1 for i in range(len(csvfile)): if i % 10000000 == 0: open(str(filename) + '.csv', 'w+').writelines(csvfile[i:i+10000000]) filename += 1 It works well but for second file, the code did not add header which is very important for me. My question is that How can I add header for second file

问题 I'm trying to use this library commons-csv (1.5) for generating the csv file, i've make a simple program for seeing the result : String SAMPLE_CSV_FILE = "./sample.csv"; try ( BufferedWriter writer = Files.newBufferedWriter(Paths.get(SAMPLE_CSV_FILE)); CSVPrinter csvPrinter = new CSVPrinter(writer, CSVFormat.EXCEL .withHeader("ID", "Name", "Designation", "Company")); ) { csvPrinter.printRecord("1", "Name1 ", "CEO", "Google"); csvPrinter.printRecord("2", "Name2", "CEO", "Microsoft");

问题 I'm trying to use this library commons-csv (1.5) for generating the csv file, i've make a simple program for seeing the result : String SAMPLE_CSV_FILE = "./sample.csv"; try ( BufferedWriter writer = Files.newBufferedWriter(Paths.get(SAMPLE_CSV_FILE)); CSVPrinter csvPrinter = new CSVPrinter(writer, CSVFormat.EXCEL .withHeader("ID", "Name", "Designation", "Company")); ) { csvPrinter.printRecord("1", "Name1 ", "CEO", "Google"); csvPrinter.printRecord("2", "Name2", "CEO", "Microsoft");

问题 I'm trying to use this library commons-csv (1.5) for generating the csv file, i've make a simple program for seeing the result : String SAMPLE_CSV_FILE = "./sample.csv"; try ( BufferedWriter writer = Files.newBufferedWriter(Paths.get(SAMPLE_CSV_FILE)); CSVPrinter csvPrinter = new CSVPrinter(writer, CSVFormat.EXCEL .withHeader("ID", "Name", "Designation", "Company")); ) { csvPrinter.printRecord("1", "Name1 ", "CEO", "Google"); csvPrinter.printRecord("2", "Name2", "CEO", "Microsoft");

问题 I'm trying to use this library commons-csv (1.5) for generating the csv file, i've make a simple program for seeing the result : String SAMPLE_CSV_FILE = "./sample.csv"; try ( BufferedWriter writer = Files.newBufferedWriter(Paths.get(SAMPLE_CSV_FILE)); CSVPrinter csvPrinter = new CSVPrinter(writer, CSVFormat.EXCEL .withHeader("ID", "Name", "Designation", "Company")); ) { csvPrinter.printRecord("1", "Name1 ", "CEO", "Google"); csvPrinter.printRecord("2", "Name2", "CEO", "Microsoft");

问题 I am using Dataprep within Google Cloud Console. I am trying to export my recipe as a CSV. Export settings are the following: The issue I am facing is that the final result is showing a replicate header, like the following, without any clear reason since the header should be present just once: Any idea why this is happening? Any help would be much appreciated :-) Marco 回答1: It's actually a bug. Trifacta is already on it: Slack conversation: 来源： https://stackoverflow.com/questions/63305077