Fix Commit history of API changes

[Smit-create]

Fixes #671

[coveralls]

Coverage: 94.038% (-1.3%) from 95.347% when pulling d1e5919 on Smit-create:i-671 into 9ffb7d2 on QuantEcon:main.

[Smit-create]

The commit history issues seem to be resolved and it can be verified on my fork's branch: https://github.com/Smit-create/QuantEcon.py/tree/i-671/quantecon

[oyamad]

I think this should be from .._compute_fp?

Suggested change

	from quantecon._compute_fp import _compute_fixed_point_ig
	from .._compute_fp import _compute_fixed_point_ig

(Several other places.)

[Smit-create]

Relative imports are often confusing so IMHO it's better to use absolute imports.

[oyamad]

Is it just a matter of exposition? I thought it made some real difference in some occasions (but I don't know what it would be).

But one general idea is that one should avoid hard coding: If we wanted to change the library name (although it is very unlikely to happen), the part would have to be modified.

[oyamad]

@mmcky You made some argument about this in #137 (comment) (long time ago..). Would that apply here?

[oyamad]

What is the status of this PR? We can discuss the "from quantecon.XXX versus from ..XXX" issue later.

[Smit-create]

I have rebased this on the top of the latest main branch.
Steps to verify this PR:

1. Checkout a new branch from main say qe_new_main_check
2. Merge this branch on my fork to this new branch by: git merge Smit-create/i-671.
3. Please try to check the commit history of individual files mainly those of _name.py by git log _name.py.

Please try these steps to verify and when both @oyamad and @mmcky agree we can look forward to merging this.

Somehow there is some overriding to commit history because of merge conflicts and so the commit history of these files is getting lost.

[oyamad]

As you force-pushed it seems that the commit histories have been lost again, e.g., History, Blame. I had seen them certainly there before you did force push (resolve the conflicts?).

[oyamad]

@Smit-create Can you share your script to change the file names? (I guess you didn't type commands manually one by one?)

[Smit-create]

Renaming files using this:

Python script

import subprocess

# add full path
ROOT_DIR_PATH = '/Users/thebigbool/repos/Quantecon.py/quantecon'

files = ['lae.py', 'gridtools.py', 'estspec.py', 'ivp.py',
'arma.py', 'lqnash.py',
'kalman.py', 'lqcontrol.py', 'inequality.py',
'lss.py', 'dle.py', 'matrix_eqn.py', 'discrete_rv.py',
'rank_nullspace.py', 'graph_tools.py', 'robustlq.py', 'ce_util.py',
'ecdf.py', 'filter.py', 'compute_fp.py', 'quadsums.py']


for file in files:
    _file = "_" + file
    cmd = f"git mv {file} {_file}"
    process = subprocess.run(cmd, shell=True, cwd=ROOT_DIR_PATH)
    if process.returncode != 0:
            print(f"Command failed: {cmd}")
            exit(1)

[Smit-create]

Closing in favor of #682