Combine/concatenate/join data in many excel or csv files in the same folder using Python

#import numpy as np
import pandas as pd
import glob

#### Combine, concatenate, join multiple excel files in a given folder into one dataframe, Each excel files having multiple sheets
#### All sheets in a single Excel file are first combined into a dataframe, then all the Excel Books in the folder
#### Are combined to make a single data frame. The combined data frame is the exported into a single Excel sheet.

#path = r'C:\Users\Tchamna\Downloads\UTRC_DATA\495GowanusSpeedData20152016'
path = r'C:\Users\Tchamna\Downloads\UTRC_DATA\test'

print(filenames)

### Dataframe Initialization
concat_all_sheets_all_files = pd.DataFrame()

for file in filenames:

### Note that the result is given as an Ordered Dictionary File


#print(df)




### Use append command to append/stack the previous concatenated data on top of each other
### as the iteration goes on for every files in the folder

#print(concat_all_sheets)

[ChaitanyaGupta]

I usually don't comment on any of the YouTube videos, but this is exactly what I was looking for...
Thanks!!

[redfeathersa]

THIS IS THE BEST YOUTUBE EXPLANATION OF MERGING, APPENDING FILES I HAVE EVER SEEN AND HEARD !! Yes Sir! It is indeed the best merge/append files into 1 sheet python script and explanation I have seen!! Better then any others including essays, articles and examples from medium, towards datascience, and other videos with 0000's of views. !! You should have those views!! & more!! I used what you carefully said to successfully merge files in excel and you explained my "shifting" columns problem!! As I had no official headers the previous output was all over the place, often shifting to the right, but now I know why !! header=0 (the 0th index row, the table's headers) was basically wrong !! header=None was right !! Now it all aligns and matched up!! I'm so glad I Watched & heard you!!! :) Very methodological and clear!! You must be an ANGEL!! Thank you !!!

[sierrahighcloud]

amazing. i've been looking for this for ages. can't thank you enough. great work!

[geoffreygray]

Very helpful video! Clear and worked great when I tried on my own. Thank you.

[jyotisharma-xgos]

I Echo with Chaitanya, Easy to understand, Great job!

[ericyong]

Very useful for concatenate multiple excel spreadsheet

[zacharysaldivar]

This is an awesome tutorial. Very helpful. Thank you Rodrigue!

[footballlobbing]

Thanks for awesome video lecture !
I can learn how to use glob after listen this kindly lecture !

[malayku]

Really very helpful! Thank you so much!

[t-rexrex]

Thanks very much for the step by step guide. It is awesome. I am trying to use the same format for multiple CSV files I keep geting errors.

Can you please share another video for CSV files. Also can you concat CSV and write them as excel?

[marciokoko]

I need something similar, perhaps you have a video on taking different rows from an excel file, which are the ones that represent the different products[rows] timeseries data to be used in the LSTM forecast. I need to read each row as individual timeframe and process it in jupyter and then produce new excel file with forecasted values in the separate rows. Is this possible?

[akosmakovics]

heyy, great video, thanks. can you help me, how to set: first column has the filenames, second one the sheetnames in each rows? Thank you for your solution.

[mikedarnell]

how about cvs files? ExcelWriter doesn't work right? What should be alternative? Thanks!

[leorafacedeno]

Great video... the problem that I'm facing is that this approach seems to work when the code is writing on the same folder as where the input data resides, the folder I'm trying to access is read-only and I'm unable to get the right result

[RodrigueTchamna]

Who else started this video from the second part at 10:20 ? :)

[mohamedhatem]

I wanna do the same process but get the columns of each file side by side . please, can you tell me how can I do it?

[slimshady]

how about the other way around? import multiple csv file in one workbook, per sheet?

[sanchaykanade]

I have multiple excel files and i want to add all of them in one single file but as different sheets. Any idea how can i implement this use case?

[aldo]

How do you keep separate sheets? and not join all data in one sheet.. thank you

[samuely-vz]

can I drop the last n rows of each sheet and concat ?? thanks