create a characters.py file containing unicode characters

docs/_api/msl.qt.characters.rst

@@ -0,0 +1,7 @@
+msl.qt.characters module
+========================
+
+.. automodule:: msl.qt.characters
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/api.rst

@@ -14,6 +14,7 @@ which has the following modules
 
 .. autosummary::
 
+   msl.qt.characters
    msl.qt.constants
    msl.qt.convert
    msl.qt.exceptions
@@ -46,6 +47,7 @@ Package Structure
    :maxdepth: 1
 
    msl.qt <_api/msl.qt>
+   msl.qt.characters <_api/msl.qt.characters>
    msl.qt.constants <_api/msl.qt.constants>
    msl.qt.convert <_api/msl.qt.convert>
    msl.qt.exceptions <_api/msl.qt.exceptions>

msl/qt/__init__.py

@@ -73,6 +73,7 @@ def application(*args):
     SpinBox,
     LED,
 )
+from .characters import *
 
 # the following object is imported from _qt.py
 binding = binding

msl/qt/characters.py

@@ -0,0 +1,85 @@
+"""
+Unicode characters.
+"""
+from enum import Enum
+
+__all__ = ['DEGREE', 'DEGREE_C', 'DEGREE_F', 'GREEK', 'INFINITY', 'PLUS_MINUS']
+
+DEGREE = '\u00B0'
+"""Degree character."""
+
+DEGREE_C = '\u2103'
+"""Degree Centigrade character."""
+
+DEGREE_F = '\u2109'
+"""Degree Fahrenheit character."""
+
+
+class GREEK(Enum):
+    """Greek characters."""
+    Alpha = '\u0391'
+    Beta = '\u0392'
+    Gamma = '\u0393'
+    Delta = '\u0394'
+    Epsilon = '\u0395'
+    Zeta = '\u0396'
+    Eta = '\u0397'
+    Theta = '\u0398'
+    Iota = '\u0399'
+    Kappa = '\u039A'
+    Lambda = '\u039B'
+    Mu = '\u039C'
+    Nu = '\u039D'
+    Xi = '\u039E'
+    Omicron = '\u039F'
+    Pi = '\u03A0'
+    Rho = '\u03A1'
+    Sigma = '\u03A3'
+    Tau = '\u03A4'
+    Upsilon = '\u03A5'
+    Phi = '\u03A6'
+    Chi = '\u03A7'
+    Psi = '\u03A8'
+    Omega = '\u03A9'
+    alpha = '\u03B1'
+    beta = '\u03B2'
+    gamma = '\u03B3'
+    delta = '\u03B4'
+    epsilon = '\u03B5'
+    zeta = '\u03B6'
+    eta = '\u03B7'
+    theta = '\u03B8'
+    iota = '\u03B9'
+    kappa = '\u03BA'
+    lambda_ = '\u03BB'
+    mu = '\u03BC'
+    nu = '\u03BD'
+    xi = '\u03BE'
+    omicron = '\u03BF'
+    pi = '\u03C0'
+    rho = '\u03C1'
+    sigmaf = '\u03C2'
+    sigma = '\u03C3'
+    tau = '\u03C4'
+    upsilon = '\u03C5'
+    phi = '\u03C6'
+    chi = '\u03C7'
+    psi = '\u03C8'
+    omega = '\u03C9'
+    thetasym = '\u03D1'
+    upsih = '\u03D2'
+    straightphi = '\u03D5'
+    piv = '\u03D6'
+    Gammad = '\u03DC'
+    gammad = '\u03DD'
+    varkappa = '\u03F0'
+    varrho = '\u03F1'
+    straightepsilon = '\u03F5'
+    backepsilon = '\u03F6'
+
+
+INFINITY = '\u221E'
+"""Infinity character."""
+
+PLUS_MINUS = '\u00B1'
+"""Plus-minus character."""

msl/qt/constants.py

@@ -1,83 +1,10 @@
 """
-Package constants.
+Constants used by the **MSL-Qt** package.
 """
 import os
-from enum import Enum
 
 HOME_DIR = os.path.join(os.path.expanduser('~'), '.msl')
 """:class:`str`: The default ``$HOME`` directory where all files used by the package are located."""
 
 SI_PREFIX_MAP = {i: prefix for i, prefix in enumerate('yzafpn\u00b5m kMGTPEZY', start=-8)}
-""":class:`dict`: The SI prefixes used to form multiples of 10**(3*n), n=-8..8"""
-
-DEGREE = '\u00B0'
-""":class:`str`: The degree symbol."""
-
-DEGREE_C = '\u2103'
-""":class:`str`: The degree Centigrade symbol."""
-
-DEGREE_F = '\u2109'
-""":class:`str`: The degree Fahrenheit symbol."""
-
-
-class GREEK(Enum):
-    """Greek letters."""
-    Alpha = '\u0391'
-    Beta = '\u0392'
-    Gamma = '\u0393'
-    Delta = '\u0394'
-    Epsilon = '\u0395'
-    Zeta = '\u0396'
-    Eta = '\u0397'
-    Theta = '\u0398'
-    Iota = '\u0399'
-    Kappa = '\u039A'
-    Lambda = '\u039B'
-    Mu = '\u039C'
-    Nu = '\u039D'
-    Xi = '\u039E'
-    Omicron = '\u039F'
-    Pi = '\u03A0'
-    Rho = '\u03A1'
-    Sigma = '\u03A3'
-    Tau = '\u03A4'
-    Upsilon = '\u03A5'
-    Phi = '\u03A6'
-    Chi = '\u03A7'
-    Psi = '\u03A8'
-    Omega = '\u03A9'
-    alpha = '\u03B1'
-    beta = '\u03B2'
-    gamma = '\u03B3'
-    delta = '\u03B4'
-    epsilon = '\u03B5'
-    zeta = '\u03B6'
-    eta = '\u03B7'
-    theta = '\u03B8'
-    iota = '\u03B9'
-    kappa = '\u03BA'
-    lambda_ = '\u03BB'
-    mu = '\u03BC'
-    nu = '\u03BD'
-    xi = '\u03BE'
-    omicron = '\u03BF'
-    pi = '\u03C0'
-    rho = '\u03C1'
-    sigmaf = '\u03C2'
-    sigma = '\u03C3'
-    tau = '\u03C4'
-    upsilon = '\u03C5'
-    phi = '\u03C6'
-    chi = '\u03C7'
-    psi = '\u03C8'
-    omega = '\u03C9'
-    thetasym = '\u03D1'
-    upsih = '\u03D2'
-    straightphi = '\u03D5'
-    piv = '\u03D6'
-    Gammad = '\u03DC'
-    gammad = '\u03DD'
-    varkappa = '\u03F0'
-    varrho = '\u03F1'
-    straightepsilon = '\u03F5'
-    backepsilon = '\u03F6'
+""":class:`dict`: The SI prefixes used to form multiples of :math:`10^{3n}, n=` -8 .. 8"""