python try catch

1try:
2    someFunction()
3except Exception as ex:
4    template = "An exception of type {0} occurred. Arguments:\n{1!r}"
5    message = template.format(type(ex).__name__, ex.args)
6    print (message)

1try:
2  # Dangerous stuff
3except ValueError:
4  # If you use try, at least 1 except block is mandatory!
5  # Handle it somehow / ignore
6except (BadThingError, HorrbileThingError) as e:
7  # Hande it differently
8except:
9  # This will catch every exception.
10else:
11  # Else block is not mandatory.
12  # Dangerous stuff ended with no exception
13finally:
14  # Finally block is not mandatory.
15  # This will ALWAYS happen after the above blocks.

1>>> def catch():
2...     try:
3...         asd()
4...     except Exception as e:
5...         print e.message, e.args
6... 
7>>> catch()
8global name 'asd' is not defined ("global name 'asd' is not defined",)

1try:
2  print("I will try to print this line of code")
3except ERROR_NAME:
4  print("I will print this line of code if error ERROR_NAME is encountered")

1import sys
2
3try:
4    f = open('myfile.txt')
5    s = f.readline()
6    i = int(s.strip())
7except OSError as err:
8    print("OS error: {0}".format(err))
9except ValueError:
10    print("Could not convert data to an integer.")
11except:
12    print("Unexpected error:", sys.exc_info()[0])
13    raise

1>>> def divide(x, y):
2...     try:
3...         result = x / y
4...     except ZeroDivisionError:
5...         print("division by zero!")
6...     else:
7...         print("result is", result)
8...     finally:
9...         print("executing finally clause")
10...
11>>> divide(2, 1)
12result is 2.0
13executing finally clause
14>>> divide(2, 0)
15division by zero!
16executing finally clause
17>>> divide("2", "1")
18executing finally clause
19Traceback (most recent call last):
20  File "<stdin>", line 1, in <module>
21  File "<stdin>", line 3, in divide
22TypeError: unsupported operand type(s) for /: 'str' and 'str'
23