code: def pad_per_step(inputs, pad_len):
      return np.pad(
          inputs,
          [[0, 0], [0, 0], [0, pad_len]],
          mode="constant",
          constant_values=0.0,
      )
  
file_path: TTS/TTS/tts/utils/data.py
imports: import numpy
label_desc: Use image node_id 7 for calling a global function with example usage: pad_per_step(inputs, pad_len) and returns: np