Test multiple PARI versions

.travis-install-pari.sh

@@ -0,0 +1,22 @@
+# Helper script to install PARI for Travis CI
+
+# Exit on error
+set -e
+
+PARI_URL="http://pari.math.u-bordeaux.fr/pub/pari/$URLDIR"
+
+# Figure out PARI version and download location
+# Note that we support giving a list of URLs
+if [ "$PARI_VERSION" = snapshot ]; then
+    PARI_VERSION=$(wget -qO- "$PARI_URL" | sed -n 's/.*href="\(pari-.*-g.*\)[.]tar[.]gz".*/\1/p')
+fi
+
+# Download PARI sources
+wget --no-verbose "$PARI_URL/$PARI_VERSION.tar.gz"
+
+# Install
+tar xzf "$PARI_VERSION.tar.gz"
+cd "$PARI_VERSION"
+./Configure --prefix=/usr
+make gp
+sudo make install

.travis.yml

@@ -10,23 +10,25 @@ python:
   - "3.4"
   - "3.5"
   - "3.6"
-# non python dependencies
+env:
+  - PARI_VERSION=pari-2.8.1.beta
+    URLDIR=unstable
+  - PARI_VERSION=pari-2.9.3
+    URLDIR=unix
+  - PARI_VERSION=snapshot
+    URLDIR=snapshots
+
 before_install:
-  - sudo apt-get -qq update
-  - wget http://pari.math.u-bordeaux.fr/pub/pari/unix/pari-2.9.3.tar.gz
-  - tar xf pari-2.9.3.tar.gz
-  - cd pari-2.9.3/
-  - ./Configure --prefix=/usr/
-  - make gp
-  - sudo make install
-  - cd ..
-# command to install dependencies
-install: 
-  - pip install --verbose Cython
-  - pip install --verbose cysignals
-  - pip install --verbose Sphinx
+  - export PATH="/usr/lib/ccache:$PATH"
+  - ccache -M 256M && ccache -s
+install:
+  - bash -x .travis-install-pari.sh
+  - pip install --build=/tmp/pip --verbose -r requirements.txt
   - pip install --verbose .
 # command to run tests
 script:
   - python tests/rundoctest.py
   - (cd docs && make html)
+cache:
+  directories:
+    - $HOME/.ccache

cypari2/gen.pyx

@@ -688,14 +688,6 @@ cdef class Gen(Gen_auto):
     def polred(self, *args, **kwds):
         r'''
         This function is :emphasis:`deprecated`, use :meth:`.polredbest` instead.
-
-        Tests:
-
-        >>> from cypari2 import Pari
-        >>> pari = Pari()
-
-        >>> pari('x^4 + 8').polred(2)
-        [1, x - 1; 1/2*x^2 + 1, x^2 - 2*x + 3; -1/2*x^2 + 1, x^2 - 2*x + 3; 1/2*x^2, x^2 + 2; 1/4*x^3, x^4 + 2]
         '''
         import warnings
         with warnings.catch_warnings():
@@ -2899,12 +2891,10 @@ cdef class Gen(Gen_auto):
         >>> pari(1.0).sizeword() == (4 if bitness == '32' else 3)
         True
 
-        >>> pari('x').sizeword()
-        9
-        >>> pari('x^20').sizeword()
-        66
-        >>> pari('[x, I]').sizeword()
-        20
+        >>> pari('x + 1').sizeword()
+        10
+        >>> pari('[x + 1, 1]').sizeword()
+        16
         """
         return gsizeword(x.g)
 
@@ -4504,14 +4494,6 @@ cdef class Gen(Gen_auto):
         Traceback (most recent call last):
         ...
         PariError: incorrect type in boundfact (t_POL)
-
-        PARI doesn't have an algorithm for factoring multivariate
-        polynomials:
-
-        >>> pari('x^3 - y^3').factor()
-        Traceback (most recent call last):
-        ...
-        PariError: sorry, factor for general polynomials is not yet implemented
         """
         cdef GEN g
         global factor_proven
@@ -4816,13 +4798,13 @@ cdef class Gen(Gen_auto):
         >>> from cypari2 import Pari
         >>> pari = Pari()
 
-        >>> pari('[1/2, 1.0*I]').debug()
+        >>> pari('[1/2, 1 + 1.0*I]').debug()
         [&=...] VEC(lg=3):...
           1st component = [&=...] FRAC(lg=3):...
             num = [&=...] INT(lg=3):... (+,lgefint=3):...
             den = [&=...] INT(lg=3):... (+,lgefint=3):...
           2nd component = [&=...] COMPLEX(lg=3):...
-            real = [&=...] INT(lg=2):... (0,lgefint=2):...
+            real = [&=...] INT(lg=3):... (+,lgefint=3):...
             imag = [&=...] REAL(lg=3):... (+,expo=0):...
         """
         sig_on()