fix E731

Author: GiacomoPope

pyproject.toml

@@ -42,8 +42,9 @@ build-backend = "mesonpy"
 [tool.cython-lint]
 # We currently ignore
 # E129 visually indented line with same indent as next logical line
+# E501 line too long (128 > 120 characters)
 max-line-length = 120
-ignore = ['E129','E501','E731','E741','E743']
+ignore = ['E129','E501','E741','E743']
 exclude = 'src/flint/flintlib/.*'
 
 [tool.spin]

src/flint/functions/showgood.pyx

@@ -82,7 +82,7 @@ def good(func, slong prec=0, slong maxprec=0, slong dps=0,
         maxprec = 10 * prec + 100
 
     if metric == "abssum":
-        metric = lambda L: sum(abs(c) for c in L)
+        def metric(L): return sum(abs(c) for c in L)
 
     # for printing
     if dps == 0: