# 10.24. Clara FastIO Variable Passthrough - Compare Operator¶

This application is NOT for medical use.

## 10.24.1. Overview¶

This application reads a Nifti file in the expected payload input folder (/input), and the output payload (from another operator) named fastio-to-npz/numpy_npz which is expected to contain a compressed Numpy array file.

It compares the contents of these inputs to ensure

## 10.24.2. Inputs¶

This application, in the form of a Docker container, expects an input folder (/input by default), which must be mapped to a host folder, and an output payload from another operator with output name fastio-to-npz/numpy_npz. The following file is expected in the folder:

• An image file in Nifti format.
• A Numpy file (compressed or not)/

## 10.24.3. Outputs¶

A file containing true or false depending on whether the input images are equal.

## 10.24.4. Directory Structure¶

The directories in the container are shown below.

/app_compare
├── Dockerfile
├── main.py
└── requirements.txt