Alive_bar() crashes when printing bytes (such as with click.echo)

Hi, I’m using click.echo to print messages as the bar is being displayed and I’m running into an error. Check out the example below:

import click
import time
from alive_progress import alive_bar

# First example with standard print function, runs fine
# with alive_bar() as bar:
#     for i in range(100):
#         print(f'Printing iteration {i} with print')
#         time.sleep(0.05)
#         bar()

# Now, with click stdout
with alive_bar() as bar:
    for i in range(100):
        click.echo(f'Printing iteration {i} with click.echo')
        time.sleep(0.05)
        bar()

which gives me the error:

on 0: Traceback (most recent call last):
  File "venv/lib/python3.8/site-packages/alive_progress/core/progress.py", line 249, in __alive_bar
    yield bar
on 0: File "alive_progress_bug.py", line 15, in <module>
    click.echo(f'Packet no. {i}')
on 0: File "venv/lib/python3.8/site-packages/click/utils.py", line 298, in echo
    file.write(out)  # type: ignore
on 0: File "venv/lib/python3.8/site-packages/alive_progress/core/hook_manager.py", line 32, in flush
    write(stream, '\n')
on 0: File "venv/lib/python3.8/site-packages/alive_progress/core/hook_manager.py", line 45, in write
    nested = ''.join(line or ' ' * len(header) for line in buffer)
on 0: TypeError: sequence item 0: expected str instance, bytes found
on 0: During handling of the above exception, another exception occurred:
      
Traceback (most recent call last):
  File "alive_progress_bug.py", line 18, in <module>
    bar()
on 0: File "/usr/lib/python3.8/contextlib.py", line 131, in __exit__
    self.gen.throw(type, value, traceback)
on 0: File "venv/lib/python3.8/site-packages/alive_progress/core/progress.py", line 251, in __alive_bar
    stop_monitoring()
on 0: File "venv/lib/python3.8/site-packages/alive_progress/core/progress.py", line 151, in stop_monitoring
    hook_manager.uninstall()
on 0: File "venv/lib/python3.8/site-packages/alive_progress/core/hook_manager.py", line 70, in uninstall
    flush_buffers()
on 0: File "venv/lib/python3.8/site-packages/alive_progress/core/hook_manager.py", line 28, in flush_buffers
    flush(stream)
on 0: File "venv/lib/python3.8/site-packages/alive_progress/core/hook_manager.py", line 32, in flush
    write(stream, '\n')
on 0: File "venv/lib/python3.8/site-packages/alive_progress/core/hook_manager.py", line 45, in write
    nested = ''.join(line or ' ' * len(header) for line in buffer)
on 0: TypeError: sequence item 0: expected str instance, bytes found

[TheTechRobo]

I think we should decode the binary data. It’s not like the program will completely mess up - it’ll just crash, exactly like it does now. It wouldn’t be reducing compatibility.

[rsalmei]

Hey, it is released! #131 Take a look at the new readme for details! 🎉