#!/usr/bin/env python
# coding: utf-8

# In[20]:


import sys, traceback

try:
    1/0
except Exception as e:
    print(e)
    print(type(e))
    print(e.args)    
    print(vars(sys.exc_info()[0]))
    print(vars(sys.exc_info()[1]))
    print(sys.exc_info())
    print(type(sys.exc_info()[1]), sys.exc_info()[1]) 


# In[44]:


import sys
sys.exc_info()


# In[7]:


import sys
try:
    a
except ZeroDivisionError:
    print('--> ZeroDivisionError!')
except as e:
    print("--> except: ", )
    raise
else:
    print('--> no except!')
finally:
    print('--> always!')


# https://docs.python.org/3/library/traceback.html
# 
# traceback.print_tb(tb, limit=None, file=None)
# traceback.print_exception(etype, value, tb, limit=None, file=None, chain=True)
# traceback.print_exc(limit=None, file=None, chain=True)
# 

# In[39]:


import sys, traceback

def main():
    my_exc()

def my_exc():
    return 1/0

try:
    main()
except Exception:
    exc_type, exc_value, exc_traceback = sys.exc_info()
    print("*** print_tb: (too simple)")
    traceback.print_tb(exc_traceback, limit=2, file=sys.stdout)
    print()
    
    print("*** print_exception: (hard to call)")
    # exc_type below is ignored on 3.5 and later
    traceback.print_exception(exc_type, exc_value, exc_traceback,
                              limit=2, file=sys.stdout)
    print()
    
    print("*** print_exc: (best?)")
    traceback.print_exc(file=sys.stdout)
    print()
    
    print("*** format_exc: (return str)")
    formatted_lines = traceback.format_exc()
    print(traceback.format_exc())
    print()
    
    print("*** format_exception:")
    # exc_type below is ignored on 3.5 and later
    print(repr(traceback.format_exception(exc_type, exc_value,
                                          exc_traceback)))
    print()
    
    print("*** extract_tb:")
    print(repr(traceback.extract_tb(exc_traceback)))
    print()
    
    print("*** format_tb:")
    print(repr(traceback.format_tb(exc_traceback)))
    print()
    
    print("*** tb_lineno:", exc_traceback.tb_lineno)