Fixed pint-convert

Close #1646

1 files changed, 40 insertions, 16 deletions

diff --git a/pint/pint_convert.py b/pint/pint_convert.py
index b30bb94..d8d60e8 100755
--- a/pint/pint_convert.py
+++ b/pint/pint_convert.py
@@ -69,6 +69,12 @@ ureg.autoconvert_offset_to_baseunit = True
 ureg.enable_contexts("Gau", "ESU", "sp", "energy", "boltzmann")
 ureg.default_system = args.system
 
+
+def _set(key: str, value):
+    obj = ureg._units[key].converter
+    object.__setattr__(obj, "scale", value)
+
+
 if args.unc:
     import uncertainties
 
@@ -106,28 +112,46 @@ if args.unc:
         m_e = uncertainties.ufloat(*m_e)
         m_p = uncertainties.ufloat(*m_p)
         m_n = uncertainties.ufloat(*m_n)
-    ureg._units["R_inf"].converter.scale = R_i
-    ureg._units["g_e"].converter.scale = g_e
-    ureg._units["m_u"].converter.scale = m_u
-    ureg._units["m_e"].converter.scale = m_e
-    ureg._units["m_p"].converter.scale = m_p
-    ureg._units["m_n"].converter.scale = m_n
+
+    _set("R_inf", R_i)
+    _set("g_e", g_e)
+    _set("m_u", m_u)
+    _set("m_e", m_e)
+    _set("m_p", m_p)
+    _set("m_n", m_n)
 
     # Measured constants with zero correlation
-    ureg._units["gravitational_constant"].converter.scale = uncertainties.ufloat(
-        ureg._units["gravitational_constant"].converter.scale, 0.00015e-11
+    _set(
+        "gravitational_constant",
+        uncertainties.ufloat(
+            ureg._units["gravitational_constant"].converter.scale, 0.00015e-11
+        ),
     )
-    ureg._units["d_220"].converter.scale = uncertainties.ufloat(
-        ureg._units["d_220"].converter.scale, 0.000000032e-10
+
+    _set(
+        "d_220",
+        uncertainties.ufloat(ureg._units["d_220"].converter.scale, 0.000000032e-10),
     )
-    ureg._units["K_alpha_Cu_d_220"].converter.scale = uncertainties.ufloat(
-        ureg._units["K_alpha_Cu_d_220"].converter.scale, 0.00000022
+
+    _set(
+        "K_alpha_Cu_d_220",
+        uncertainties.ufloat(
+            ureg._units["K_alpha_Cu_d_220"].converter.scale, 0.00000022
+        ),
     )
-    ureg._units["K_alpha_Mo_d_220"].converter.scale = uncertainties.ufloat(
-        ureg._units["K_alpha_Mo_d_220"].converter.scale, 0.00000019
+
+    _set(
+        "K_alpha_Mo_d_220",
+        uncertainties.ufloat(
+            ureg._units["K_alpha_Mo_d_220"].converter.scale, 0.00000019
+        ),
     )
-    ureg._units["K_alpha_W_d_220"].converter.scale = uncertainties.ufloat(
-        ureg._units["K_alpha_W_d_220"].converter.scale, 0.000000098
+
+    _set(
+        "K_alpha_W_d_220",
+        uncertainties.ufloat(
+            ureg._units["K_alpha_W_d_220"].converter.scale, 0.000000098
+        ),
     )
 
     ureg._root_units_cache = dict()