Preview: StackViewer.py
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//opt/alt/python27/lib64/python2.7/idlelib/StackViewer.py
import os
import sys
import linecache
import re
import Tkinter as tk
from idlelib.TreeWidget import TreeNode, TreeItem, ScrolledCanvas
from idlelib.ObjectBrowser import ObjectTreeItem, make_objecttreeitem
from idlelib.PyShell import PyShellFileList
def StackBrowser(root, flist=None, tb=None, top=None):
if top is None:
top = tk.Toplevel(root)
sc = ScrolledCanvas(top, bg="white", highlightthickness=0)
sc.frame.pack(expand=1, fill="both")
item = StackTreeItem(flist, tb)
node = TreeNode(sc.canvas, None, item)
node.expand()
class StackTreeItem(TreeItem):
def __init__(self, flist=None, tb=None):
self.flist = flist
self.stack = self.get_stack(tb)
self.text = self.get_exception()
def get_stack(self, tb):
if tb is None:
tb = sys.last_traceback
stack = []
if tb and tb.tb_frame is None:
tb = tb.tb_next
while tb is not None:
stack.append((tb.tb_frame, tb.tb_lineno))
tb = tb.tb_next
return stack
def get_exception(self):
type = sys.last_type
value = sys.last_value
if hasattr(type, "__name__"):
type = type.__name__
s = str(type)
if value is not None:
s = s + ": " + str(value)
return s
def GetText(self):
return self.text
def GetSubList(self):
sublist = []
for info in self.stack:
item = FrameTreeItem(info, self.flist)
sublist.append(item)
return sublist
class FrameTreeItem(TreeItem):
def __init__(self, info, flist):
self.info = info
self.flist = flist
def GetText(self):
frame, lineno = self.info
try:
modname = frame.f_globals["__name__"]
except:
modname = "?"
code = frame.f_code
filename = code.co_filename
funcname = code.co_name
sourceline = linecache.getline(filename, lineno)
sourceline = sourceline.strip()
if funcname in ("?", "", None):
item = "%s, line %d: %s" % (modname, lineno, sourceline)
else:
item = "%s.%s(...), line %d: %s" % (modname, funcname,
lineno, sourceline)
return item
def GetSubList(self):
frame, lineno = self.info
sublist = []
if frame.f_globals is not frame.f_locals:
item = VariablesTreeItem("<locals>", frame.f_locals, self.flist)
sublist.append(item)
item = VariablesTreeItem("<globals>", frame.f_globals, self.flist)
sublist.append(item)
return sublist
def OnDoubleClick(self):
if self.flist:
frame, lineno = self.info
filename = frame.f_code.co_filename
if os.path.isfile(filename):
self.flist.gotofileline(filename, lineno)
class VariablesTreeItem(ObjectTreeItem):
def GetText(self):
return self.labeltext
def GetLabelText(self):
return None
def IsExpandable(self):
return len(self.object) > 0
def GetSubList(self):
sublist = []
for key in self.object.keys():
try:
value = self.object[key]
except KeyError:
continue
def setfunction(value, key=key, object=self.object):
object[key] = value
item = make_objecttreeitem(key + " =", value, setfunction)
sublist.append(item)
return sublist
def keys(self): # unused, left for possible 3rd party use
return self.object.keys()
def _stack_viewer(parent): # htest #
root = tk.Tk()
root.title("Test StackViewer")
width, height, x, y = list(map(int, re.split('[x+]', parent.geometry())))
root.geometry("+%d+%d"%(x, y + 150))
flist = PyShellFileList(root)
try: # to obtain a traceback object
intentional_name_error
except NameError:
exc_type, exc_value, exc_tb = sys.exc_info()
# inject stack trace to sys
sys.last_type = exc_type
sys.last_value = exc_value
sys.last_traceback = exc_tb
StackBrowser(root, flist=flist, top=root, tb=exc_tb)
# restore sys to original state
del sys.last_type
del sys.last_value
del sys.last_traceback
if __name__ == '__main__':
from idlelib.idle_test.htest import run
run(_stack_viewer)
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