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SURENDRA MALLA
3,727 Pointscode works in workspace but not on visual studio code
first_name = input("what is your name?")
print("hello,", first_name)
print(first_name, "is learning")
and when i run the script
surendras-MBP:python smalla$ python hello.py
what is your name?malla
Traceback (most recent call last):
File "hello.py", line 10, in <module>
first_name = input("what is your name?")
File "<string>", line 1, in <module>
NameError: name 'malla' is not defined
surendras-MBP:python smalla$
Mod Edit: Added code formatting to make the post easier to read.
6 Answers
Bruce Röttgers
18,211 PointsYour computer uses python 2 if you run python hello.py in bash.
Your computer uses python 3 if you run python3 hello.py in bash.
andren
28,558 PointsThis happens because you have Python 2 installed on your machine, while Treehouse teaches Python 3.
There were many changes between Python 2 and 3, and some of them were breaking changes that meant that Python 2 code won't always work in Python 3 and vice versa. That is why Python 2 is still the default Python version in many operating systems, including macOS. In Python 2 the input method interpreted the input it got as code that it should execute, rather than simply returning it as a string like the method does in Python 3.
Python 2 does have a method that returns the input as a string called raw_input, so if you change input to raw_input then you will no longer get a NameError. But there are tons of other changes between Python 2 and 3 that will make your code behave differently than expected. So if you want to test out the code you learn on Treehouse on your own machine then it would be a good idea to install Python 3 on it.
Bruce Röttgers
18,211 PointsYou can install Python 3 from the official site python.org.
if you're on Mac and have Homebrew installed you can do brew install python3
@andren could you format the code in the question
andren
28,558 PointsI can indeed 
SURENDRA MALLA
3,727 Pointsi did installed Python 3 and if i lunch python shell it is 3.7 but if i run it in terminal and visual studio code it runs Python 2.
Bruce Röttgers
18,211 PointsYou need to run the command python3 to use the python 3 interpreter.
SURENDRA MALLA
3,727 Pointsi am still not getting it, sorry. when you want to run script in a terminal bash '''surendras-MBP:python smalla$ python hello.py ''' and it uses Python 2 automatically
SURENDRA MALLA
3,727 PointsThanks Andren and Bruce.
SURENDRA MALLA
3,727 PointsCool and crystal clear Bruce, Thanks! '''first_name = input("what is your name?") print("hello,", first_name) print(first_name, "is learning")''' output: "'surendras-MBP:python smalla$ python3 hello.py what is your name?malla hello, malla malla is learning surendras-MBP:python smalla$'''
Bruce Röttgers
18,211 PointsBruce Röttgers
18,211 PointsPlease format your code using the mardown cheatsheet and the three backticks.