How can I not require tqdm to be installed?

Question

I'd like to use tqdm in my script but not require others to use it if they haven't installed it.

I've found this:

try:
    import tqdm
except ImportError:
    tqdm = None

But I'm not sure how to use tqdm==None with this:

with tqdm.tqdm(total=totalSize) as pbar:

Where totalSize is the file size (or sum of file sizes when looping over multiple files).

Answer 1

With help from tqdm's documentation and my try/except logic, I have this working:

try:
    import tqdm
except ImportError:
    tqdm = None

if (tqdm == None):
    pbar = None
else:
    pbar = tqdm.tqdm(total=totalSize)

#... inside the loop processing my file[s]...
if (pbar):
    pbar.update(len(line))