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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 get_lib2to3_fixers():
    '''returns a list of all fixers found in the lib2to3 library'''
    fixers = []
    fixer_dirname = fixer_dir.__path__[0]
    for name in sorted(os.listdir(fixer_dirname)):
        if name.startswith("fix_") and name.endswith(".py"):
            fixers.append("lib2to3.fixes." + name[:-3])
    return fixers