What is something you should have learned or understood earlier?
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

What is something that you recently learned that you wish you would have learned or understood earlier?

Date: January 10, 2020

Mine is the python debugger. I was a long holdout thinking that print statements were sufficient. That was untill I started having errors crop up in functions that took minutes to run. The thing that I most notably wish I would have known about is post_mortem.

Example
───────

```
[ins] In [4]: def repeater(msg, repeats=1):
         ...:     "repeats messages {repeats} number of times"
         ...:     print(f'{msg}\n' * repeats)

[ins] In [5]: repeater('hi', 3)
hi
hi
hi

[ins] In [6]: repeater('hi', 'a')
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-6-0ec595774c81> in <module>
----> 1 repeater('hi', 'a')

<ipython-input-4-530890de75cd> in repeater(msg, repeats)
      1 def repeater(msg, repeats=1):
      2     "repeats messages {repeats} number of times"
----> 3     print(f'{msg}\n' * repeats)
      4
```

Debug with iPython/Jupyter
━━━━━━━━━━━━━━━━━━━━━━━━━━

```
%debug
```

Vanilla Debug
─────────────

```
import pdb
import sys

pdb.post_mortem(sys.last_traceback)
```

More
────

For more information about the debugger checkout the real python article. https://realpython.com/python-debugging-pdb/

Also keep a bookmark of the table of pdb commands from the article https://realpython.com/python-debugging-pdb/#essential-pdb-commands

Debug Session
━━━━━━━━━━━━━

Image: debug session <https://res.cloudinary.com/practicaldev/image/fetch/s--ShQ3NN06--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/1tnri6wdwimwk7i83cvg.png> <https://res.cloudinary.com/practicaldev/image/fetch/s--ShQ3NN06--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_880/https://thepracticaldev.s3.amazonaws.com/i/1tnri6wdwimwk7i83cvg.png>