Indexing for symbolic expressions

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Any expression has a number >=0 of operands. For convenience this ticket implements indexing ex[i] as a shortcut for calling ex.operands()[i].

Component: symbolics

Issue created by migration from https://trac.sagemath.org/ticket/24080

[rwst]

Description changed:

--- 
+++ 
@@ -1 +1 @@
-Any expression has a number `>=0` of operands. For convenience this ticket implements indexing `ex[i]` as a shortcut for calling `ex.operands[i]`.
+Any expression has a number `>=0` of operands. For convenience this ticket implements indexing `ex[i]` as a shortcut for calling `ex.operands()[i]`.

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Branch: u/rws/indexing_for_symbolic_expressions

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New commits:

c2039fd

24080: Indexing for symbolic expressions

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Author: Ralf Stephan

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Commit: c2039fd

[sagetrac-git]

Changed commit from c2039fd to b9b6f22

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

b9b6f22

24080: fix doctest

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comment:5

sage -t --long --warn-long 46.5 src/sage/functions/hypergeometric.py  # 1 doctest failed
sage -t --long --warn-long 46.5 src/sage/functions/min_max.py  # 2 doctests failed
sage -t --long --warn-long 46.5 src/sage/rings/complex_double.pyx  # 3 doctests failed
sage -t --long --warn-long 46.5 src/sage/calculus/interpolators.pyx  # 4 doctests failed
sage -t --long --warn-long 46.5 src/sage/calculus/desolvers.py  # 2 doctests failed
sage -t --long --warn-long 46.5 src/sage/structure/coerce.pyx  # 1 doctest failed
sage -t --long --warn-long 46.5 src/sage/matrix/special.py  # 2 doctests failed
sage -t --long --warn-long 46.5 src/sage/plot/graphics.py  # 2 doctests failed
sage -t --long --warn-long 46.5 src/sage/plot/misc.py  # 1 doctest failed
sage -t --long --warn-long 46.5 src/sage/plot/plot.py  # 4 doctests failed
sage -t --long --warn-long 46.5 src/sage/plot/matrix_plot.py  # 1 doctest failed
sage -t --long --warn-long 46.5 src/sage/symbolic/function.pyx  # 3 doctests failed
sage -t --long --warn-long 46.5 src/sage/numerical/optimize.py  # 3 doctests failed
sage -t --long --warn-long 46.5 src/doc/en/prep/Calculus.rst  # 1 doctest failed