how to code this and import it?

Question

Create 2 functions; one to convert a value from Fahrenheit to celsius and the second function to convert from celsius to Fahrenheit, remember to return the values in the function statement.

Create a new python file called ICE1.py. Using Import, import your new functions script in the ICE.py script.

Using the print() function, test and invoke the celsius and Fahrenheit functions.

Answer 1

# convert.py

def to_celsius(fahr): return (fahr - 32.0) * 5 / 9

def to_fahrenheit(cels): return 9.0 / 5 * cels + 32.0

# ice1.py

from convert import to_celsius, to_fahrenheit

def run_temp_tests():

print('#============= Cels to Fahr tests ======================')

for cels in range(-50, 51, 10):

print(f'{cels:3d} C is {to_fahrenheit(cels):7.2f} F')

print('\n#============= Fahr to Cels tests ======================')

for fahr in range(-50, 51, 10):

print(f'{fahr:3d} F is {to_celsius(fahr):7.2f} C')

print()

def main():

run_temp_tests()

if __name__ == '__main__':

main()

#=============================================================

# OUTPUT

#=============================================================

#============= Cels to Fahr tests ======================

# -50 C is -58.00 F

# -40 C is -40.00 F

# -30 C is -22.00 F

# -20 C is -4.00 F

# -10 C is 14.00 F

# 0 C is 32.00 F

# 10 C is 50.00 F

# 20 C is 68.00 F

# 30 C is 86.00 F

# 40 C is 104.00 F

# 50 C is 122.00 F

#============= Fahr to Cels tests ======================

# -50 F is -45.56 C

# -40 F is -40.00 C

# -30 F is -34.44 C

# -20 F is -28.89 C

# -10 F is -23.33 C

# 0 F is -17.78 C

# 10 F is -12.22 C

# 20 F is -6.67 C

# 30 F is -1.11 C

# 40 F is 4.44 C

# 50 F is 10.00 C

Answer 2

To start off with, lets create the functions skeleton and then import these functions. By first setting up a skeleton, you can test things out before we get into the logic of the conversions. When importing a python function from another file, you need to create all files in the same directory or use a relative path. For this example, we are going to put all python files in the same folder. Then, to import the functions, you can either use a * keyword to import all functions from a file, or you can explicitly list the functions you want to import. When creating the temp_functions.py file, we define the module's name with a '#' symbol. In the following example, we will explicitly name the functions we want to import.

1. temp_functions.py

# temp_functions.py>

# Function declarations

# Converts Celsius to Fahrenheit

def convert_celsius(temp):

ctemp = temp #Actual Logic goes here

return ctemp

# Converts Fahrenheit to Celsius

def convert_fahrenheit(temp):

ctemp = temp # Actual Logic goes here

return ctemp

1. ICE1.py

from temp_functions import convert_celsius, convert_fahrenheit

#Call both functions

celsius_conv = convert_celsius(5)

print(celsius_conv)

fahren_conv = convert_fahrenheit(75)

print(fahren_conv)

Now, before we implement the logical section, lets test out the code is properly linked and calling the functions. I directly invoke the code with the python3 command from a terminal, but you can also use whatever IDE you prefer. Regardless the output should look like this:

python3 ICE1.py

5

75

Finally, lets implement the logic of the function and test it again to see that we get the right answer. I will only provide the pseudo code for the logic. The equations for these two conversions can be found online.

1. Celsius to Fahrenheit

ctemp = temp * 9/5 + 32

1. Fahrenheit to Celsius

ctemp = (temp - 32) * 5/9

After you have plugged this in, try it out again using the same method as before, and you should get output similar to this:

python3 ICE1.py

41.0

23.88888888888889