This macro creates a wire (or points) with the coordinates extracted from a file. The coordinates X Y Z are separated by a space.

Macro_WireXYZ.FCMacro

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
# created a wire with coordinate x y z separated (in the file without coma)
__title__= "Macro_WireXYZ"
__author__= "Mario52"
__date__= "2020/10/16"
__version__= "00.03"
##
#EX:
#0 0 0
#10 10 10
#15 20 25
#. . . .

from FreeCAD import Base
import Draft, Part

## path for Windows    : C:\yourPath\cloud.asc (create one error in Python (cause, the "\" is a command syntax in Python)
## replace "\" by "/"  result : C:/yourPath/cloud.asc 
## or replace the "\" by "\\" result : C:\\yourPath\\cloud.asc 

fichier = "C:\\yourPath\\cloud.asc"                          # path and name of file.txt

file = open(fichier, "r")                                  # open the file read
wire = []
X=Y=Z = 0.0

for ligne in file:
    coordinates = ligne.split()
    try:                                                        # for format PCD ignore the header
        X,Y,Z = coordinates                                     # separate the coordinates
#        Draft.makePoint(float(X),float(Y),float(Z))            # create points (uncomment for use)
        print(X," ",Y," ",Z)
        wire.append(FreeCAD.Vector(float(X),float(Y),float(Z))) # append the coordinates
    except Exception:
        None
file.close()
Draft.makeWire(wire,closed=False,face=False,support=None)   # create the wire open
#Draft.makeWire(wire,closed=True,face=False,support=None)   # create the wire closed (uncomment for use)

#Draft.makeBSpline(wire,closed=False,face=False,support=None)# create the BSpline open (uncomment for use)
#Draft.makeBSpline(wire,closed=True,face=False,support=None)# create the BSpline open (uncomment for use)

App.ActiveDocument.recompute()

This macro utility is intended for the use of the program FreeCAD http://www.freecadweb.org/