def drive(self, event, *args):
""" Spreads an event """
try:
item = self.base[event]
except KeyError:
pass
else:
for handle, data in item[:]:
try:
# We call the handle associated to event.
# if it returns an iterator we just chain it.
seq = handle(self, *(args + data))
# In case of not having an iterator we go on
# processing.
if not seq:
continue
# It chains the iterator.
point = next(seq)
point(self, seq)
# It stops processing handles linked to event.
except Stop:
break
# It stops all the sequence of events.
except Kill, Root:
raise
except StopIteration:
pass
# It prints the exception.
except Exception:
debug()
def exc(data, env):
"""
This function is used to execute python code and it sets
the sys.stderr to sys.stdout so exceptions would be printed on sys.stdout.
After the code being executed then sys.stderr is restored to its
default value.
The data argument is python code to be executed and env is a dictionary where
the code will be executed.
Note: It is mostly used to execute python code from vy.
"""
import sys
# It has to be set before because
# if some data code catches an exception
# then prints use print_exc it will go to
# sys.__stderr__.
tmp = sys.stderr
sys.stderr = sys.stdout
try:
exec(data, env)
except Exception:
debug()
finally:
sys.stderr = tmp
def drive(self, event, *args):
""" It evaluates all callbacks linked to event """
for signal, handle in self.base.keys():
################
if signal == event:
try:
old_args = self.base[signal, handle]
except KeyError:
continue
new_args = glue(args, old_args)
try:
#it evaluates handle
seq = handle(*new_args)
if seq:
chain(self, seq)
except Exception as excpt:
debug()
#it stops processing event
if isinstance(excpt, Stop):
break
elif isinstance(excpt, Kill):
raise excpt
################
self.default(event, *args)
def execute(handle, *args, **kwargs):
"""
"""
try:
val = handle(*args, **kwargs)
except Exception:
debug()
else:
return val
def execute(handle, *args, **kwargs):
"""
"""
try:
val = handle(*args, **kwargs)
except Exception:
debug()
else:
return val
def runcode(self, data, env):
# It has to be set before because if some data code catches
# an exception then prints use print_exc it will go to sys.__stderr__.
tmp = sys.stderr
sys.stderr = sys.stdout
try:
exec(data, env)
except Exception as e:
debug()
root.status.set_msg('Error: %s' % e)
finally:
sys.stderr = tmp
def get_data(self, spin, data):
"""
"""
try:
self.fd.write(data)
except Exception:
zmap(spin, LOAD, self.get_data)
debug()
is_done = self.check_data_size()
if is_done:
zmap(spin, LOAD, self.get_data)
def wait_for_data(self):
try:
self.fd = tmpfile('a+')
except Exception:
debug()
return
try:
self.fd.write(self.data)
except Exception:
debug()
return
is_done = self.check_data_size()
if is_done:
return
xmap(self.spin, LOAD, self.get_data)
def exc(data, env):
"""
"""
import sys
# It has to be set before because
# if some data code catches an exception
# then prints use print_exc it will go to
# sys.__stderr__.
tmp = sys.stderr
sys.stderr = sys.stdout
try:
exec(data, env)
except Exception:
debug()
finally:
sys.stderr = tmp
def exc(data, env):
"""
"""
import sys
# It has to be set before because
# if some data code catches an exception
# then prints use print_exc it will go to
# sys.__stderr__.
tmp = sys.stderr
sys.stderr = sys.stdout
try:
exec(data, env)
except Exception:
debug()
finally:
sys.stderr = tmp
def execute(handle, *args, **kwargs):
"""
It executes handle and avoids throwing a exception but it prints the exception.
Example:
def func(a, b):
return a/b
# It wouldnt throw an exception.
r = execute(func, 1, 0)
# It would print None.
print r
"""
try:
val = handle(*args, **kwargs)
except Exception:
debug()
else:
return val
def wrapper(*args, **kwargs):
try:
handle(*args, **kwargs)
except Exception:
debug()
return 'break'
