Reshape data to make consistent column count. Line by line operation without high memory usage.

reshapeData.py

def reshape(srcFilePath, destFilePath, delim, colCount, filler=''):
    with open(srcFilePath, 'r') as src, open(destFilePath, 'w') as dest:
        for line in src:
            arr = line.split(delim)
            if len(arr) < colCount:
                line = line.strip() + delim*(colCount-len(arr))
            if len(arr) > colCount:
                line = delim.join(arr[:colCount])
            dest.write(f'{line}\n')

reshape('src.txt', 'dest.txt', '||', 5)