Tqdm: Adding custom information on pandas progress_apply

[AliAbdelaal]

• [ ] I have marked all applicable categories:
  
  
  
  • [ ] exception-raising bug
  
  
  • [ ] visual output bug
  
  
  • [ ] documentation request (i.e. "X is missing from the documentation." If instead I want to ask "how to use X?" I understand [StackOverflow#tqdm] is more appropriate)
  
  
  • [x] new feature request
  
  
• [x] I have visited the [source website], and in particular
  read the [known issues]
• [x] I have searched through the [issue tracker] for duplicates
• [ ] I have mentioned version numbers, operating system and
  environment, where applicable:
  ```python
  import tqdm, sys
  print(tqdm.__version__, sys.version, sys.platform)

4.42.1 3.7.6 (default, Jan 8 2020, 19:59:22)
[GCC 7.3.0] linux
`` Can't add a custom information message such asset_postfixfor example when dealing with pandas dataframeprogress_apply` function.

[casperdcl]

#from tqdm.auto import tqdm
from tqdm import tqdm
import pandas as pd

df = pd.DataFrame(...)
tqdm.pandas(desc="customised", postfix={"hello": -1})
df.progress_apply(...)

tqdm.pandas(desc="remove postfix", postfix=None)
df.progress_apply(...)

I agree this is clunky but (kw)arguments to df.progress_apply are all passed to df.apply

[AliAbdelaal]

#from tqdm.auto import tqdm
from tqdm import tqdm
import pandas as pd

df = pd.DataFrame(...)
tqdm.pandas(desc="customised", postfix={"hello": -1})
df.progress_apply(...)

tqdm.pandas(desc="remove postfix", postfix=None)
df.progress_apply(...)

I agree this is clunky but (kw)arguments to df.progress_apply are all passed to df.apply

Can I change the postfix string based on the iteration dynamically instead of having some fixed postfix ?

[casperdcl]

That's not exactly currently supported, and it wouldn't be easy to add without breaking backward compatibility.

The easiest approach would be explicitly defining a bar_format, e.g:

tqdm.pandas(
    bar_format="{l_bar}{bar}| {n_fmt}/{total_fmt} [{elapsed}<{remaining}, {rate_fmt}, iter={n}]")
df.progress_apply(...)

[AliAbdelaal]

Cool, thank you so much for your help.