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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 int(name, default=None, allow_none=False, fallback=None):
 """Get a string environment value or the default. Args: name: The environment variable name default: The default value to use if no environment variable is found allow_none: If the return value can be `None` (i.e. optional) """

    value = read(name, default, allow_none, fallback=fallback)
    if isinstance(value, builtins.str):
        value = value.strip()

    if value is None and allow_none:
        return None
    else:
        return builtins.int(value)