macOS Python on Mac

[dsbass98]

Hi,
i'm just starting out on python. I'm learning boolean data types however every time time i enter a string into terminal, i receive this error message:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'true' is not defined

 

[chown33]

Post the exact line you entered.

Post your OS version and your Python version.

 

[drsoong]

Upper case True and False

True and False are case sensitive upper case in Python:

>>> a=true
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'true' is not defined
>>> a=True
>>> print a
True
>>>

Quite confusing for C++ developers, where they are lower case.

 

[boast]

Helps using your favorite text editor with syntax highlighting to remember syntax when jumping between different languages.

 

[drsoong]

^^ True

 

[ArtOfWarfare]

Add true = True to your Python startup file and the capitalization stops mattering.

 

[dollystereo]

String:
>>>a='true'

Bool:
>>>a=True

Not the same...