how to use try and error python code example

Example 1: python try except

import sys

try:
    f = open('myfile.txt')
    s = f.readline()
    i = int(s.strip())
except OSError as err:
    print("OS error: {0}".format(err))
except ValueError:
    print("Could not convert data to an integer.")
except:
    print("Unexpected error:", sys.exc_info()[0])
    raise

Example 2: try except python

# Python try: except:

try:
  print(a + b) # Program will try the add b to a
except:
  print("There was an error") # If the program will have an error in the try block
  							  # The except block will run
    						  # except block will run and then the program will continue to run
    
# Examples:
a = 1
b = 1 # <===== no error, except block skipped

a = 1
b = 'one' # <===== error, except block run