Merge two csv files python

The pd. See the following example we have implemented the approach as mentioned above using pandas python:. To merge all. First, we had to import all libraries.

After that, we set the path for all files that we need to merge. In the following example, the os. Here's how my files look: Num status closed open open and another file has this: Num code So, here is my little code that I was trying to loop through but it does not print the output with the third column added matching the correct values. Improve this question. DSM k 60 60 gold badges silver badges bronze badges. Helen Neely Helen Neely 4, 8 8 gold badges 37 37 silver badges 61 61 bronze badges.

Add a comment. Active Oldest Votes. Improve this answer. Cody Braun Cody Braun 6 6 silver badges 17 17 bronze badges. Thanks, I will investigate pandas at the weekend. Also, with pandas you can handle larger files with less memory. If you decide to use pandas , you can do it in only five lines. Zenadix Zenadix Thanks for the code, it worked but someone above bit you to it. Maybe next time — Helen Neely. This worked great, I was using merge but I was losing the lines that didn't have the same index and the index.

This way it is merging the ones that match and keeping the ones that don't and also keep the index :- — Marilu. Leonid Glanz Leonid Glanz 1, 2 2 gold badges 16 16 silver badges 34 34 bronze badges. Thanks, this looks like a great approach. I'm currently on the train but will jump on it once I get home.

I will definitely let you know if this works. Does this answer your question? Thanks, this worked like a charm. We can get rid of that easily enough:. Then, since the values in the dictionaries are lists, you need to just concatenate the lists together:. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Collectives on Stack Overflow. Learn more. Asked 8 years, 8 months ago. Active 3 years, 3 months ago. Viewed k times. Essentially I have 2 csv files with a common first column. I would like to merge the 2. Improve this question. Rex Rex 2 2 gold badges 6 6 silver badges 15 15 bronze badges. Can you describe what you want in a simpler way? Add a comment. Active Oldest Votes.