Python：在循环中迭代条件语句

Question

So I have a list of values called temp_data and I have imported two functions I want to use, which are:

# Function which converts from fahr to celsius
def fahr_to_celsius(temp_fahrenheit):
    converted_temp = (temp_fahrenheit - 32)/ 1.8 # Now we have assigned the convertable number to the variable
    return converted_temp

def temp_classifier(temp_celsius): #Function name temp_classifier, parameter temp_celsius that we later use to define the temperature
    if temp_celsius <-2: #Classifies temperatures below -2 degrees (Celsius) and returns value 0
        return 0
    elif (temp_celsius >-2) and (temp_celsius <2): #Classifies temperatures equal or higher than -2 up to +2 degrees (Celsius) and returns value 1
        return 1
    elif (temp_celsius >=2) and (temp_celsius <15): #Classifies temperatures equal or higher than +2 up to +15 degrees (Celsius) and returns value 2
        return 2
    elif temp_celsius >15: #Classifies temperatures equal or higher than +15 degrees (Celsius) and returns value 3
        return 3

The first function works well where I iterate over the values of temp_data and convert them to celsius with the output of temp_celsius . The output of being

for t in temp_data: #Takes the iteration data from temp_data
    temp_celsius=(fahr_to_celsius(t)) #Assigns output to variable
    print(temp_celsius)

output:

-7.222222222222222
-6.111111111111111
-6.111111111111111
-6.111111111111111
-5.0

and so on (336 values).

But then when I want to use these variables of temp_celsius in the other function temp_classifier I get the error 'float' object is not iterable .

for t in temp_celsius: #Takes the iteration data from temp_data
    temp_class=(temp_classifier(t)) #Assigns output to variable
    print(temp_class)

What am I doing wrong here? The goal is to assign the outputs of the first function temp_celsius to the categories of the other function temp_classifier .

Answer 1

It seems that you're iterating over a float instead floats saved in an iterable object, eg a list.

for t in temp_celsius: # Make sure temp_celsius is an iterable
    temp_class = temp_classifier(t)
    print(temp_class)

or calling directly the float without iteration if you're only interested in converting one value:

temp_class = temp_classifier(t)
    print(temp_class)