def concat2(strs):
    string = ''
    for val in strs:
        if not isinstance(val, str):
            raise ValueError('Invalid string!')
        string += '{}'.format(val)
    return string
Add some strs together - silently.
dataset/ETHPy150Open christabor/MoAL/MOAL/software_engineering/problem_solving/design_patterns/unix/silence.py/concat2