Combine every number of files in a folder into one file

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I have a large number of files in one folder (about 2 million files), I would like to combine every 50 files into one. the code below combines all into one. I can't come about a way to combine every 50 files into one and also ensure that any number over the multiplication of 50 is also combined into one file. For example, if the number of files is 2,000,034 then I end up with many files of 50 combined files and one file that has the last 34 files.

from glob import iglob
import shutil
import os

PATH = r'C:\Test'

destination = open('allcontents.sh', 'wb')
for file in iglob(os.path.join(PATH, '*.sh')):
    shutil.copyfileobj(open(file, 'rb'), destination)
destination.close()

I would use a list instead of an iterator because a list is easier to manipulate:

filelist = glob(os.path.join(PATH, '*.sh'))

Chop the list into 50-item slices and copy the files from each slice into one file. The name of the output file contains the number of the first file in the slice:

BLOCK = 50
for i in range(0, len(filelist) + BLOCK, BLOCK):
    with open('contents-{}.sh'.format(i), 'wb') as destination:
        for filename in filelist[i:i+BLOCK]:
            with open(filename, 'rb') as infile:
                shutil.copyfileobj(infile, destination)

How to Combine or Merge Multiple Text Files, There are several occasions where you may need to merge multiple text files, all in different directories, which you need to combine into one file for If I only want to combine the text files in this one folder, I would issue this  I can't come about a way to combine every 50 files into one and also ensure that any number over the multiplication of 50 is also combined into one file. For example, if the number of files is 2,000,034 then I end up with many files of 50 combined files and one file that has the last 34 files.

You almost have this. I haven't tested the code below, but it will give you the idea:

from glob import iglob
import shutil
import os

PATH = r'C:\Test'

filecounter = 1
fiftycounter = 0
destination = open('fifties1.sh', 'wb')
for file in iglob(os.path.join(PATH, '*.sh')):
    shutil.copyfileobj(open(file, 'rb'), destination)
    fiftycounter += 1
    if 50 == fiftycounter:
        fiftycounter = 0
        destination.close()
        filecounter += 1
        destination = open('fifties' + str(filecounter) + '.sh', 'wb')
destination.close()

How to merge or combine multiple files, Merge a text (.txt) file in the Windows command line. Place each of the text files you want to merge in the same folder. to merge all text files into one file. It also shows the path where each particular file is located within the sub directories. Next, click the ‘Browse destination folder’ button and choose the folder where you want all the files to go. Finally, click the ‘Merge Now’ button at the bottom to start the merging process. The time taken by the application for merging the folders may vary between a few seconds up to several minutes, depending on the number and size of files in the folders that you’re merging.

The itertools recipes in the standard library documentation include this recipe (quoted verbatim):

from itertools import zip_longest
def grouper(iterable, n, fillvalue=None):
    "Collect data into fixed-length chunks or blocks"
    # grouper('ABCDEFG', 3, 'x') --> ABC DEF Gxx"
    args = [iter(iterable)] * n
    return zip_longest(*args, fillvalue=fillvalue)

You can use that to wrap your iglob() call to bring back chunks of 50 elements (the last one will have extra None at the end) and then iterate through that list.

i_files = iglob(os.path.join(PATH, '*.sh'))
i_grouped = grouper(i_files, 50)
for (n, group) in enumerate(i_grouped):
  destination_fn = 'allcontents_{}.sh'.format(n)
  with open(destination_fn, 'w') as f:
    for input_fn in group:
      ...

How to merge all (text) files in a directory into one?, This is technically what cat ("concatenate") is supposed to do, even though most people just use it for outputting files to stdout. If you give it multiple filenames it  Select each of the files and folders you want to add to the compressed file. Right-click one of the selected files or folders and click the compression utility quick link. For example, with WinRAR, you would click Add to archive or Add to <name of file>. With WinZip, you would click Add to Zip.

How To Merge Or Combine Multiple Files Into A Single File, With Copy, you can specify a number of files as inputs and one file as an output file. This will then copy all of the input files into the one output  I need to create a big file, by merging multiple files scattered in several subfolders contained in an Azure Blob Storage, also a transformation needs to be done, each file contains a JSON array of a single element, so the final file, will contain an array of JSON elements. The final purpose is to process that Big file in a Hadoop & MapReduce job.

Ways to Combine Two (or More) Text Files (Tips.Net), Example 1. Merge all data from the csv files in a folder into a text file it merge all data into a txt file and then import and save it into a Excel file for you. This example change the format of column 1 and 3 (column number, format number) Once you combine your data, you'll see all of it combined into one file, and the original filename shows in the first column. Scroll through the data to confirm that all of your rows are there. Notice that the only change from your original data is that the filename of each source file is in the first column.

Merge all CSV or TXT files in a folder in one worksheet, When the CMD window opens; you will be presented with your default document folder housing all of your personal files. From here you need to  To start the process of combining multiple files, first ensure that all the files you want to combine are contained in a single file folder. Note: Excel, Text, CSV, JSON, XML and Access files are supported. Click on Power Query tab, then From File > From Folder. Click the Browse button to locate your folder.