"SyntaxError: invalid syntax" running code in Doing Math With Python b

[DeaD_EyE]

Hint: Use https://pypi.org/project/ipython/

You have to indent explicit by 4 spaces after the try and the except:

>>> try:
...     a = float(input('Enter a number: '))
... except ValueError:
...     print('You entered an invalid number')
...
Enter a number: 3/4
You entered an invalid number
>>>

Same with IPython repl:

In [1]: try:
   ...:     a = float(input('Enter a number: '))
   ...: except ValueError:
   ...:     print('You entered an invalid number')
   ...:
Enter a number: 3/4
You entered an invalid number

In [2]:

The benefit here is, that the indentation for multiline is made automatically.
You don't have to hit 4 times the space, if you use IPython. Also Tabulator is converted into 4 spaces :-)