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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 parse_chanjo_sexcheck(handle: TextIO):
 """Parse Chanjo sex-check output."""

    samples = csv.DictReader(handle, delimiter='\t')
    for sample in samples:
        return {
            'predicted_sex': sample['sex'],
            'x_coverage': float(sample['#X_coverage']),
            'y_coverage': float(sample['Y_coverage']),
        }