I use the Python psycopg2 module to copy the content of a csv file (a list of users) into a PostGreSQL database. So I begin to parse the CSV with the Python pandas module. Then with a for loop, I try to insert my data in my SQL queries. I have two problems : a) When I execute the role
Tag: csv
How to upload a (csv) file with an AJAX call and Flask
I’m updating on updating an older project that uses AJAX and have decided to use Flask to do so. For the particular page I’m currently working on, I need to be able to upload a CSV and read the data in the file (no need to save it). I have several other pages that work using AJAX, but they return
Nested dictionary to CSV convertion optimization
I have a dictionary like this: My function to transform that into a CSV is this one: My output is a csv file like this: It is working, but it isn’t well optimized. The process is very slow when I run into a dictionary with more than > 10,000 entries. Any ideas on how to speed this process up? Thank
While merging 100+ CSV files, how to fill nan in a column if it doesn’t exist in “usecol”?
Considering that I have CSV files which looks roughly like this I am using the following script which was suggested here Most of the files have all three columns, while few of them do not have ColC. This will give an error (understandably) which is as follows: ValueError: Usecols do not match columns, columns…
How to fix memory error while importing a very large csv file to mongodb in python?
Given below is the code for importing a pipe delimited csv file to monogdb. Below is the error I get when running the above code. I if modify the code with some indents under the for loop. The MongoDB gets imported with the same data all over again without stopping. Answer The memory issue can be solved by in…
Python CSV different delimiter
I am trying to read a file that has ` as delimiters. I have tried some of the other solutions for a different delimiter but none seemed to work. example input file: the expected out should be: but this is what I get: Thanks for your time! Answer I’d suggest using the DictReader class from the standard l…
How To Read and Print Data from CSV file into HTML File as Text
I’ve been trying to read data from .csv file and print the data as text/number into HTML file. Like the below example: Now, I want to print in HTML like this: Current age of Mr. abc is 30 Years. The bold & Italic text/numbers will be coming from the csv file and as soon as the csv file updated, the
python web scraping data to csv
I was trying to use python web scraping then output a csv file but the print format is not matching csv format. outputenter image description here how to print this expecting results? enter image description here Thanks Below is my script Answer The first problem is you use “writerows”, which will…
Converting csv with several items to a json with several elements in Python
Hello I have been exploring Python to do a task in which I have the following csv file: My goal was to get a json with the following structure: I was looking at a suggestion on how to convert csv files to json using the following code However the reader is not identifying each item in the csv as an
How to use a CSV file and use the CSV file to have an input from a user?
I have dataset about car accidents statistics by using a .csv file. I want the user to type in State and all of the information about that State gets displayed for the user to see. How can do that? Dataset: I’m thinking of something like this: Answer I suggest you use the standard-library’s csv mo…