[python] merge files in folder

mergeFiles.py

import shutil, os

# Function: merge files in current _dataDir folder!
def mergeFiles(_dataDir, _finalFileName):
    if _dataDir == "":
        print("Error no path available")
    else:
        # output Filename
        outfilename = os.path.join(_dataDir, _finalFileName)

        # open all .htm files and merge them to the outfilename
        with open(outfilename, 'wb') as outfile:            
            for filename in os.listdir(_dataDir):
                customEnding = ".htm"
                if filename.endswith(customEnding):
                    tempFileName = os.path.join(dataDir, filename)  # filename with dataDir
                    if tempFileName == outfilename:
                        # don't want to copy the output into the output
                        continue
                    with open(tempFileName, 'rb') as readfile:
                        shutil.copyfileobj(readfile, outfile)
        Print("-> All " + customEnding + " files merged into: " + _finalFileName + "\n")