SyntaxError with Colab Example
I am running the following ipynp on my Colab:
https://github.com/NVIDIA/NeMo/blob/v1.0.2/tutorials/asr/01_ASR_with_NeMo.ipynb 

I only replaced the data set to speech commands from "an4" as it seems the link for an4 is not working. 

In the section "Using NeMo for Automatic Speech Recognition", the very first cell where I import nemo:

NeMo's "core" package
import nemo
NeMo's ASR collection - this collections contains complete ASR models and
building blocks (modules) for ASR
import nemo.collections.asr as nemo_asr

I get the following output:
[NeMo W 2022-03-17 16:03:28 optimizers:46] Apex was not found. Using the lamb optimizer will error out.

  File "/usr/local/lib/python3.7/dist-packages/webdataset/cache.py", line 43
    while data := stream.read(chunk_size):
                ^
SyntaxError: invalid syntax

Could anyone please point at a fix for this?