ImportError: cannot import name 'gcd' from 'fractions' (/usr/local/lib/python3.9/fractions.py)

[kvinwang]

$ python -m bCNC
new-config Utils <configparser.ConfigParser object at 0x7effa6a47400>
================================================================================
WARNING: bCNC has been recently ported to support both python v2.x and v3.x
Most things seem to work reasonably well in both python versions.
Please report any issues to: https://github.com/vlachoudis/bCNC/issues
================================================================================
Traceback (most recent call last):
  File "/home/kvin/codes/cnc/bCNC/bCNC/ToolsPage.py", line 1098, in __init__
    exec("import %s"%(name))
  File "<string>", line 1, in <module>
  File "/home/kvin/codes/cnc/bCNC/bCNC/plugins/spirograph.py", line 20, in <module>
    from fractions import gcd
ImportError: cannot import name 'gcd' from 'fractions' (/usr/local/lib/python3.9/fractions.py)

[GitHubCaps]

Reminder: Converted plugin spirograph.py does not require import math or import fractions

Add: lcm/gcd into bmath: from bmath import (cos, lcm, pi, sin)

No dependency on standard libraries (fractions/math) and no py version dependency!

[GitHubCaps]

Example: bmath.py add:

# -----------------------------------------------------------------------------
# Delta is wise, dinosaurs must die! (I hope, nofx will forgive me ;)
# -----------------------------------------------------------------------------
def gcd(a, b):
    """Return greatest common divisor using Euclid's algorithm."""
    while b:
        a,b = b,a%b
    return a

# -----------------------------------------------------------------------------
# floor is sufficient? I want to see something/someone sticking to the ceiling,
# preferably, my closest friend, linoleum!
# -----------------------------------------------------------------------------
def lcm(a, b):
    """Return lowest common multiple."""
    return (a*b) // gcd(a,b)

spirograph.py change:

from bmath import (cos, lcm, pi, sin)

spirograph.py required lcm, which in turn, required gcd, both have been accounted for now in bmath

Solves the issue, although, there is more to the code! (comments are optional)