Valueerror: Invalid Literal For Int() With Base 10: '' Python

ValueError: invalid literal for int() with base 10: '' Why it showing the error of int(), in fact the values coming from the cgi is as string which i am converting it to integer, b

Solution 1:

The problem is because int tries to convert '' to a base 10 number, which is not possible. Thats why it is failing. You are getting the default '' if the value is not there like this

form.getvalue('opt_12', '')

instead of that use a sentinel value like this

form.getvalue('opt_12', '0')

Even better, you can convert them to numbers as and when you get them from the form like this

res12 = int(form.getvalue('opt_12', '0'))
.........