Identity is not the same thing as equality in Python

src/python/bcc/table.py

@@ -726,7 +726,7 @@ def __init__(self, *args, **kwargs):
  self.total_cpu = len(get_possible_cpus())
  # This needs to be 8 as hard coded into the linux kernel.
  self.alignment = ct.sizeof(self.sLeaf) % 8
- if self.alignment is 0:
+ if self.alignment == 0:
  self.Leaf = self.sLeaf * self.total_cpu
  else:
  # Currently Float, Char, un-aligned structs are not supported
@@ -739,7 +739,7 @@ def __init__(self, *args, **kwargs):
 
  def getvalue(self, key):
  result = super(PerCpuHash, self).__getitem__(key)
- if self.alignment is 0:
+ if self.alignment == 0:
  ret = result
  else:
  ret = (self.sLeaf * self.total_cpu)()
@@ -782,7 +782,7 @@ def __init__(self, *args, **kwargs):
  self.total_cpu = len(get_possible_cpus())
  # This needs to be 8 as hard coded into the linux kernel.
  self.alignment = ct.sizeof(self.sLeaf) % 8
- if self.alignment is 0:
+ if self.alignment == 0:
  self.Leaf = self.sLeaf * self.total_cpu
  else:
  # Currently Float, Char, un-aligned structs are not supported
@@ -795,7 +795,7 @@ def __init__(self, *args, **kwargs):
 
  def getvalue(self, key):
  result = super(PerCpuArray, self).__getitem__(key)
- if self.alignment is 0:
+ if self.alignment == 0:
  ret = result
  else:
  ret = (self.sLeaf * self.total_cpu)()