How to list all the channels in .mdf4 file using asammdf in Python?

Question

How to get a list of all the channel names in a .mdf4 file while using asammdf? I read the description here but am unable to figure out the exact code.

Answer 1

According to https://asammdf.readthedocs.io/en/latest/api.html#mdf4:

The groups attribute is a list of dicts, each one with the following keys:

• […]
• channels - list of Channel objects with the same order as found in the mdf file

And according to https://asammdf.readthedocs.io/en/latest/v4blocks.html#channel-class a Channel object has attributes

• display_name - str : channel display name; this is extracted from the XML channel comment
• name - str : channel name

So you should be able to use:

mdf4 = MDF4(name_of_mdf4_file)

all_channels = []
for group in mdf4.groups:
    for channel in group['channels']:
        all_channels.append(channel.display_name)

Or use .name instead of .display_name, depending on what exactly you need.