Converting String to Int using try except in Python

Question

So I m pretty stumped on how to convert a string into an int using the try except function  Does anyone know a simple function on how to do this  I feel like I m still a little hazy on string and ints  I m pretty confident that ints are related to numbers  Strings   not so much

User · Answer

Firstly  try   except are not functions  but statements   To convert a string  or any other type that can be converted  to an integer in Python  simply call the int   built-in function  int   will raise a ValueError if it fails and you should catch this specifically   In Python 2 x    gt  gt  gt  for value in  12345   67890  3 14  42L  0b010101  0xFE   Not convertible           try              print   s as an int is  d     str value   int value           except ValueError as ex              print    s  cannot be converted to an int   s     value  ex      12345 as an int is 12345 67890 as an int is 67890 3 14 as an int is 3 42 as an int is 42 21 as an int is 21 254 as an int is 254  Not convertible  cannot be converted to an int  invalid literal for int   with base 10   Not convertible    In Python 3 x  the syntax has changed slightly    gt  gt  gt  for value in  12345   67890  3 14  42  0b010101  0xFE   Not convertible           try              print   s as an int is  d     str value   int value            except ValueError as ex              print    s  cannot be converted to an int   s     value  ex       12345 as an int is 12345 67890 as an int is 67890 3 14 as an int is 3 42 as an int is 42 21 as an int is 21 254 as an int is 254  Not convertible  cannot be converted to an int  invalid literal for int   with base 10   Not convertible

User · Answer

It is important to be specific about what exception you re trying to catch when using a try except block   string    abcd  try      string int   int string      print string int  except ValueError        Handle the exception     print  Please enter an integer     Try Excepts are powerful because if something can fail in a number of different ways  you can specify how you want the program to react in each fail case

User · Answer

Here it is   s    123  try    i   int s  except ValueError as verr    pass   do job to handle  s does not contain anything convertible to int except Exception as ex    pass   do job to handle  Exception occurred while converting to int

User · Answer

You can do   try       string integer   int string  except ValueError       print  quot This string doesn t contain an integer quot

[python] Converting String to Int using try/except in Python

In Python 2.x:

In Python 3.x

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Examples related to python-3.x