"SyntaxError: invalid syntax" running code in Doing Math With Python b - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: General Coding Help (https://python-forum.io/forum-8.html) +--- Thread: "SyntaxError: invalid syntax" running code in Doing Math With Python b (/thread-30738.html) |
"SyntaxError: invalid syntax" running code in Doing Math With Python b - saucerdesigner - Nov-03-2020 Hello, I'm scratching my head trying to get the code in the book Doing Math With Python by Amit Saha on page 9 to work. Python 3.8.5 (default, Jul 28 2020, 12:59:40) [GCC 9.3.0] on linux Type "help", "copyright", "credits" or "license()" for more information. >>> from fractions import Fraction >>> try: a = float(input('Enter a number: ')) #keyword except doesn't un-indent, I have to force it with a backspace except ValueError: print('You entered an invalid number') Enter a number 3/4 SyntaxError: invalid syntax >>>What am I doing wrong? Wrong python version? Regards, David RE: "SyntaxError: invalid syntax" running code in Doing Math With Python b - DeaD_EyE - Nov-03-2020 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 :-) RE: "SyntaxError: invalid syntax" running code in Doing Math With Python b - saucerdesigner - Nov-03-2020 (Nov-03-2020, 03:56 PM)DeaD_EyE Wrote: Hint: Use https://pypi.org/project/ipython/ Thank you! Evidently I don't yet know how to run IDLE, so I tried PyCharm Edu and it ran ok. Thanks again1 |