Add # needs

Author: Matthias Koeppe

src/sage/libs/ntl/ntl_ZZ_pEX_linkage.pxi

@@ -332,7 +332,7 @@ cdef inline int celement_pow(ZZ_pEX_c* res, ZZ_pEX_c* x, long e, ZZ_pEX_c *modul
         sage: (x+1)^(-2)
         1/(x^2 + 2*x + 1)
         sage: f = x+(a+1)
-        sage: f**50 == sum(binomial(50,i)*(a+1)**i*x**(50-i) for i in range(51))
+        sage: f**50 == sum(binomial(50,i)*(a+1)**i*x**(50-i) for i in range(51))        # needs sage.symbolic
         True
 
     TESTS:

src/sage/misc/converting_dict.py

@@ -26,7 +26,7 @@
 This is used e.g. in the result of a variety, to allow access to the
 result no matter how a generator is identified::
 
-    sage: # needs sage.rings.number_field
+    sage: # needs sage.libs.singular sage.rings.number_field
     sage: K.<x,y> = QQ[]
     sage: I = ideal([x^2 + 2*y - 5, x + y + 3])
     sage: V = sorted(I.variety(AA), key=str)

src/sage/misc/table.py

@@ -293,7 +293,7 @@ def __eq__(self, other):
 
         EXAMPLES::
 
-            sage: # needs sage.modules sage.plot
+            sage: # needs sage.modules sage.plot sage.symbolic
             sage: rows = [['a', 'b', 'c'], [1,plot(sin(x)),3], [4,5,identity_matrix(2)]]
             sage: T = table(rows, header_row=True)
             sage: T2 = table(rows, header_row=True)

src/sage/plot/colors.py

@@ -215,7 +215,7 @@ def mod_one(x):
         0.0
         sage: mod_one(-11/7)
         0.4285714285714286
-        sage: mod_one(pi) + mod_one(-pi)
+        sage: mod_one(pi) + mod_one(-pi)                                                # needs sage.symbolic
         1.0
     """
     x = float(x)
@@ -1146,9 +1146,10 @@ def hue(h, s=1, v=1):
     This function makes it easy to sample a broad range of colors for
     graphics::
 
+        sage: # needs sage.symbolic
         sage: p = Graphics()
         sage: for phi in xsrange(0, 2 * pi, 1 / pi):
-        ....:     p += plot(sin(x + phi), (x, -7, 7), rgbcolor = hue(phi))
+        ....:     p += plot(sin(x + phi), (x, -7, 7), rgbcolor=hue(phi))
         sage: p
         Graphics object consisting of 20 graphics primitives