dataaccess.py 文件源码

def from_csv(cls, file, encoding=None, **fmtparams):
        """Create a DataSource from a CSV *file* (a path or file-like
        object)::

            source = datatest.DataSource.from_csv('mydata.csv')

        If *file* is an iterable of files, data will be loaded and
        aligned by column name::

            files = ['mydata1.csv', 'mydata2.csv']
            source = datatest.DataSource.from_csv(files)
        """
        if isinstance(file, string_types) or isinstance(file, IOBase):
            file = [file]

        new_cls = cls.__new__(cls)
        temptable = _from_csv(file, encoding, **fmtparams)
        new_cls._connection = temptable.connection
        new_cls._table = temptable.name

        repr_string = '{0}.from_csv({1}{2}{3})'.format(
            new_cls.__class__.__name__,
            repr(file[0]) if len(file) == 1 else repr(file),
            ', {0!r}'.format(encoding) if encoding else '',
            ', **{0!r}'.format(fmtparams) if fmtparams else '',
        )
        new_cls._repr_string = repr_string

        return new_cls