Skip to content

Python raise ValueError

  • by

Use raise keyword to raise ValueError in Python. You can wrap the portion of code that you want to be able to catch errors in.

except ValueError as e:

Or you can validate the string before converting it:

if not newNumbers.isdecimal():
    print('Not a valid number: ' + s)
raise ValueError('could not find %c in %s' % (ch,str))

Python raise ValueError

Simple example code Raising a ValueError in an if statement.

s = 'bababa'
ch = 'k'
if ch in s.text:
raise ValueError('could not find %c in %s' % (ch, s))


Python raise ValueError

How to use raise ValueError?

Answer: You have to catch your Error in the except block or your script will stop running at your first raise ValueError().

def isitDoubleorSingle(value):
            raise ValueError()
    except ValueError:
            print(f"Number {value} isn't double")


for x in my_list:


Do comment if you have any doubts or suggestions on this Python exception-handling topic.

Note: IDE: PyCharm 2021.3.3 (Community Edition)

Windows 10

Python 3.10.1

All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.

Leave a Reply

Discover more from Tutorial

Subscribe now to keep reading and get access to the full archive.

Continue reading