python how to raise an error code example

Example 1: throwing an exception python

raise Exception("message")

Example 2: exception pyton print

except Exception as e: print(e)

Example 3: catch error python

import traceback

dict = {'a':3,'b':5,'c':8}
try:
  print(dict[q])
 
except:
  traceback.print_exc()
  
# This will trace you back to the line where everything went wrong. 
# So in this case you will get back line 5

Example 4: python raise exception

# this raises a "NameError"

>>> raise NameError('HiThere')

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: HiThere

Example 5: python: raise error

class MyError(TypeError):
    pass

raise MyError('An error happened')