When I try to run this code, a NameError occurs at the if statement, telling me that net_affect is not defined.
h, m, s, t = input('Rate each of the following Emotions and hit enter:\nHappiness (1-7):'), input('Meaningfulness (1-7):'), input('Stressfulness (1-7):'), input('Tiredness (1-7):')
h_int=int(h)
m_int=int(m)
s_int=int(s)
t_int=int(t)
def na():
add_h_m = h_int + m_int
div_h_m = add_h_m/2
add_s_t = s_int + t_int
div_s_t = add_s_t/2
net_affect = div_h_m - div_s_t
print(net_affect)
na()
if net_affect >= 3:
print("Doing Well")
elif net_affect <3 and net_affect >0:
print("Doing Okay")
else:
print("Not Good")
This is the complete terminal output:
C:\Users\mrkev\Desktop\PAI 724>python ex2.py
Rate each of the following Emotions and hit enter:
Happiness (1-7):6
Meaningfulness (1-7):7
Stressfulness (1-7):4
Tiredness (1-7):3
3.0
Traceback (most recent call last):
File "C:\Users\mrkev\Desktop\PAI 724\ex2.py", line 16, in <module>
if net_affect >= 3:
NameError: name 'net_affect' is not defined
Why does this happen? I thought that by defining net_affect in the function (and calling it), I could then use it as a variable in the rest of my program.
Look for the 'variable scope' in your documentation or tutorials.
The net_affect variable is local to na function.
You cannot access it from the outside, and it is deleted when the function returns.
You can alternatively :
define the variable outside of the function, and indicate that you are using it in the function
net_affect = None
def na():
...
global net_affect
net_affect = div_h_m - div_s_t
return the value from the function and catch the returned value
def na():
...
net_affect = div_h_m - div_s_t
...
return net_affect # return the value
...
net_affect_new = na() # catch the value
Note: net_affect_new could be called net_affectbut they are not the same variables, they are in two different scopes.