Use subprocess instead os.system also in the examples

tomspur · tomspur · commit fa0f50980ada · 2017-02-05T00:54:17.000+01:00
diff --git a/examples/pylab_examples/mathtext_examples.py b/examples/pylab_examples/mathtext_examples.py
@@ -3,7 +3,7 @@
 """
 from __future__ import print_function
 import matplotlib.pyplot as plt
-import os
+import subprocess
 import sys
 import re
 import gc
@@ -120,6 +120,6 @@ def doall():
     fd.write("\\end{document}\n")
     fd.close()
 
-    os.system("pdflatex mathtext_examples.ltx")
+    subprocess.call(["pdflatex", "mathtext_examples.ltx"])
 else:
     doall()
diff --git a/examples/pylab_examples/movie_demo.py b/examples/pylab_examples/movie_demo.py
@@ -2,7 +2,7 @@
 
 from __future__ import print_function
 
-import os
+import subprocess
 import matplotlib.pyplot as plt
 import numpy as np
 
@@ -22,8 +22,10 @@
     files.append(fname)
 
 print('Making movie animation.mpg - this may take a while')
-os.system("mencoder 'mf://_tmp*.png' -mf type=png:fps=10 -ovc lavc -lavcopts vcodec=wmv2 -oac copy -o animation.mpg")
-#os.system("convert _tmp*.png animation.mng")
+subprocess.call(["mencoder", "'mf://_tmp*.png'", "-mf", "type=png:fps=10",
+                 "-ovc", "lavc", "-lavcopts", "vcodec=wmv2", "-oac", "copy",
+                 "-o", "animation.mpg"])
+#subprocess.call(["convert", "_tmp*.png", "animation.mng"])
 
 # cleanup
 for fname in files:
diff --git a/examples/pylab_examples/stix_fonts_demo.py b/examples/pylab_examples/stix_fonts_demo.py
@@ -1,6 +1,6 @@
 from __future__ import unicode_literals
 
-import os
+import subprocess
 import sys
 import re
 import gc
@@ -53,6 +53,6 @@ def doall():
     fd.write("\\end{document}\n")
     fd.close()
 
-    os.system("pdflatex stix_fonts_examples.ltx")
+    subprocess.call(["pdflatex", "stix_fonts_examples.ltx"])
 else:
     doall()
diff --git a/examples/tests/backend_driver.py b/examples/tests/backend_driver.py
@@ -350,7 +350,7 @@ def run(arglist):
             return ret
 except ImportError:
     def run(arglist):
-        os.system(' '.join(arglist))
+        os.system(arglist)
 
 
 def drive(backend, directories, python=['python'], switches=[]):
@@ -421,7 +421,7 @@ def drive(backend, directories, python=['python'], switches=[]):
         ret = run(program + [tmpfile_name] + switches)
         end_time = time.time()
         print("%s %s" % ((end_time - start_time), ret))
-        #os.system('%s %s %s' % (python, tmpfile_name, ' '.join(switches)))
+        #subprocess.call([python, tmpfile_name] + switches)
         os.remove(tmpfile_name)
         if ret:
             failures.append(fullpath)
