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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getFilePathsWithExtensionsInDirectory(dirTree, patterns, sort=True):
 """ Returns all file paths that match any one of patterns in a file tree with its root at dirTree. Sorts the paths by default. """

    filePaths = []
    for root, dirs, files in os.walk(dirTree):
        for filePath in files:
            for pattern in patterns:
                if fnmatch.fnmatch(filePath, pattern):
                    fullPath = os.path.join(root, filePath)
                    filePaths.append(fullPath)
                    break
    if sort:
        filePaths.sort()
    return filePaths