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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 print_versions(file: typing.TextIO = None) -> None: """ Print version strings of currently installed dependencies ``> python -m quantumflow.meta`` Args: file: Output stream. Defaults to stdout. """


    print('** QuantumFlow dependencies (> python -m quantumflow.meta) **')
    print('quantumflow \t', qf.__version__, file=file)
    print('python      \t', sys.version[0:5], file=file)
    print('numpy       \t', np.__version__, file=file)
    print('networkx    \t', nx.__version__, file=file)
    print('cvxpy      \t', cvx.__version__, file=file)
    print('pyquil      \t', pyquil.__version__, file=file)

    print(bk.name, '   \t', bk.version, '(BACKEND)', file=file)