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-rw-r--r--Python/pywarpx/PGroup.py6
-rwxr-xr-xPython/pywarpx/_libwarpx.py3
2 files changed, 8 insertions, 1 deletions
diff --git a/Python/pywarpx/PGroup.py b/Python/pywarpx/PGroup.py
index 92f6b4484..bb8ad11e2 100644
--- a/Python/pywarpx/PGroup.py
+++ b/Python/pywarpx/PGroup.py
@@ -55,6 +55,10 @@ class PGroup(object):
def addspecies(self):
pass
+ def getnpid(self):
+ # --- The -3 is because the comps include the velocites
+ return _labwarpx.warpx_nComps() - 3
+ npid = property(getnpid)
def getnps(self):
return np.array([len(self.xp)], dtype='l')
@@ -104,7 +108,7 @@ class PGroup(object):
uxp = self.getuxp(js)
uyp = self.getuyp(js)
uzp = self.getuzp(js)
- return sqrt(1. - (uxp**2 + uyp**2 + uzp**2)/warpxC.c**2)
+ return np.sqrt(1. - (uxp**2 + uyp**2 + uzp**2)/_libwarpx.clight**2)
gaminv = property(getgaminv)
def getex(self, js=0):
diff --git a/Python/pywarpx/_libwarpx.py b/Python/pywarpx/_libwarpx.py
index 07caa6763..183fe315e 100755
--- a/Python/pywarpx/_libwarpx.py
+++ b/Python/pywarpx/_libwarpx.py
@@ -6,6 +6,9 @@ from ctypes.util import find_library
import numpy as np
from numpy.ctypeslib import ndpointer
+# --- Is there a better way of handling constants?
+clight = 2.99792458e+8 # m/s
+
def get_package_root():
'''
Get the path to the installation location (where libwarpx.so would be installed).