Add CONVENTIONS file to say Gudhi follows PEP8

Add persistence and betti numbers getters


git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/ST_cythonize@1228 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: d52d7e30d3feffe206deb14e741960987ba9fa7c

4 files changed, 17 insertions, 9 deletions

diff --git a/src/cython/example/alpha_complex_example.py b/src/cython/example/alpha_complex_example.py
index 6996b692..37c04f23 100755
--- a/src/cython/example/alpha_complex_example.py
+++ b/src/cython/example/alpha_complex_example.py
@@ -66,6 +66,12 @@ print("coface([0], 1)=", alpha_complex.get_coface_tree([0], 1))
 print("point[0]=", alpha_complex.get_point(0))
 print("point[5]=", alpha_complex.get_point(5))
 
+print("betti_numbers()=")
+print(alpha_complex.betti_numbers())
+
 alpha_complex.initialize_filtration()
-print("persistence(2)=", alpha_complex.persistence(homology_coeff_field=2,
-                                                   min_persistence=0))
+print("persistence(homology_coeff_field=2, min_persistence=0)=")
+print(alpha_complex.persistence(homology_coeff_field=2, min_persistence=0))
+
+print("betti_numbers()=")
+print(alpha_complex.betti_numbers())
diff --git a/src/cython/example/mini_simplex_tree_example.py b/src/cython/example/mini_simplex_tree_example.py
index 0461a1df..d7189ddf 100755
--- a/src/cython/example/mini_simplex_tree_example.py
+++ b/src/cython/example/mini_simplex_tree_example.py
@@ -55,7 +55,8 @@ mini_st.set_dimension(2)
 # initialize_filtration required before plain_homology
 mini_st.initialize_filtration()
 
-print("plain_homology(2)=", mini_st.plain_homology(2))
+print("persistence(homology_coeff_field=2)=")
+print(mini_st.persistence(homology_coeff_field=2))
 
 edge02 = [0, 2]
 if mini_st.find(edge02):
diff --git a/src/cython/example/rips_complex_example.py b/src/cython/example/rips_complex_example.py
index eba3f298..449ea2b3 100755
--- a/src/cython/example/rips_complex_example.py
+++ b/src/cython/example/rips_complex_example.py
@@ -37,5 +37,5 @@ print("filtered_tree=", rips.get_filtered_tree())
 print("star([0])=", rips.get_star_tree([0]))
 print("coface([0], 1)=", rips.get_coface_tree([0], 1))
 
-print("persistence(2)=", rips.persistence(homology_coeff_field=2,
-                                          min_persistence=0))
+print("persistence(homology_coeff_field=2, min_persistence=0)=")
+print(rips.persistence(homology_coeff_field=2, min_persistence=0))
diff --git a/src/cython/example/simplex_tree_example.py b/src/cython/example/simplex_tree_example.py
index bdaabca2..45d57c53 100755
--- a/src/cython/example/simplex_tree_example.py
+++ b/src/cython/example/simplex_tree_example.py
@@ -2,8 +2,6 @@
 
 import gudhi
 
-st = gudhi.SimplexTree()
-
 """This file is part of the Gudhi Library. The Gudhi library
    (Geometric Understanding in Higher Dimensions) is a generic C++
    library for computational topology.
@@ -32,6 +30,9 @@ __license__ = "GPL v3"
 
 print("#####################################################################")
 print("SimplexTree creation from insertion")
+
+st = gudhi.SimplexTree()
+
 if st.insert([0, 1]):
     print("Inserted !!")
 else:
@@ -64,5 +65,5 @@ print("skeleton_tree[2]=", st.get_skeleton_tree(2))
 print("skeleton_tree[1]=", st.get_skeleton_tree(1))
 print("skeleton_tree[0]=", st.get_skeleton_tree(0))
 
-print("persistence(2)=", st.persistence(homology_coeff_field=2,
-                                        min_persistence=0))
+print("persistence(homology_coeff_field=2, min_persistence=0)=")
+print(st.persistence(homology_coeff_field=2, min_persistence=0))