csv – Page 63 – Tarik Billa

HTML Input=”file” Accept Attribute File Type (CSV)

September 9, 2022 by Tarik

Well this is embarrassing… I found the solution I was looking for and it couldn’t be simpler. I used the following code to get the desired result. <label for=”fileSelect”>Spreadsheet</label> <input id=”fileSelect” type=”file” accept=”.csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel” /> Valid Accept Types: For CSV files (.csv), use: <input type=”file” accept=”.csv” /> For Excel Files 97-2003 (.xls), use: <input … Read more

How to avoid pandas creating an index in a saved csv

September 9, 2022 by Tarik

Use index=False. df.to_csv(‘your.csv’, index=False)

Import multiple CSV files into pandas and concatenate into one DataFrame

September 9, 2022 by Tarik

See pandas: IO tools for all of the available .read_ methods. Try the following code if all of the CSV files have the same columns. I have added header=0, so that after reading the CSV file’s first row, it can be assigned as the column names. import pandas as pd import glob import os path … Read more

How to export JavaScript array info to csv (on client side)?

September 8, 2022 by Tarik

You can do this in native JavaScript. You’ll have to parse your data into correct CSV format as so (assuming you are using an array of arrays for your data as you have described in the question): const rows = [ [“name1”, “city1”, “some other info”], [“name2”, “city2”, “more info”] ]; let csvContent = “data:text/csv;charset=utf-8,”; … Read more

How to import CSV file data into a PostgreSQL table

September 8, 2022 by Tarik

Take a look at this short article. The solution is paraphrased here: Create your table: CREATE TABLE zip_codes (ZIP char(5), LATITUDE double precision, LONGITUDE double precision, CITY varchar, STATE char(2), COUNTY varchar, ZIP_CLASS varchar); Copy data from your CSV file to the table: COPY zip_codes FROM ‘/path/to/csv/ZIP_CODES.txt’ WITH (FORMAT csv);

Dump a NumPy array into a csv file

September 8, 2022 by Tarik

numpy.savetxt saves an array to a text file. import numpy a = numpy.asarray([ [1,2,3], [4,5,6], [7,8,9] ]) numpy.savetxt(“foo.csv”, a, delimiter=”,”)

Remove trailing delimiting character from a delimited string

September 7, 2022 by Tarik

Contrary to the question asked, rtrim() will remove any number of characters, listed in the second argument, from the end of the string. In case you expect just a single comma, the following code would do: $newarraynama = rtrim($arraynama, “,”); But in my case I had 2 characters, a comma and a space, so I … Read more

Writing a pandas DataFrame to CSV file

September 5, 2022 by Tarik

To delimit by a tab you can use the sep argument of to_csv: df.to_csv(file_name, sep=’\t’) To use a specific encoding (e.g. ‘utf-8’) use the encoding argument: df.to_csv(file_name, sep=’\t’, encoding=’utf-8′)

Save PL/pgSQL output from PostgreSQL to a CSV file

September 5, 2022 by Tarik

Do you want the resulting file on the server, or on the client? Server side If you want something easy to re-use or automate, you can use Postgresql’s built in COPY command. e.g. Copy (Select * From foo) To ‘/tmp/test.csv’ With CSV DELIMITER ‘,’ HEADER; This approach runs entirely on the remote server – it … Read more

How can I output MySQL query results in CSV format?

August 29, 2022 by Tarik

From Save MySQL query results into a text or CSV file: SELECT order_id,product_name,qty FROM orders WHERE foo = ‘bar’ INTO OUTFILE ‘/var/lib/mysql-files/orders.csv’ FIELDS TERMINATED BY ‘,’ ENCLOSED BY ‘”‘ LINES TERMINATED BY ‘\n’; Note: That syntax may need to be reordered to SELECT order_id,product_name,qty INTO OUTFILE ‘/var/lib/mysql-files/orders.csv’ FIELDS TERMINATED BY ‘,’ ENCLOSED BY ‘”‘ LINES … Read more