Premeds for Dog, Cat, and Rabbit

Premeds Calculator

"""The Premedicant Dose for animal type is the weight of animal multipled by drug dose rate, divided by drug concertration."""

# Dictionaries start here. 1. drug concerntrations. 2. drug rates 3. animal weight ranges

from __future__ import division # to fix rounding error on rate ranges eg dog ketamine
import re    # need regular expressions (re) for weightQ while loop to check for a float from raw_input   

drug_concerntrations = {"meloxicam" : 5.0, "amoxicillin clavulanic acid" : 32.5, "ketamine" : 100, "enrofloxacin 2.5 percent solution" : 25, "enrofloxacin 5.0 percent solution" : 50 }

rates = {
    'dog' : {"meloxicam" : [0.2], "amoxicillin clavulanic acid" : [8.75,12.5], "ketamine" : [5.0,7.0]},
    'cat' : {"meloxicam" : [0.2], "amoxicillin clavulanic acid" : [8.75,12.5], "ketamine" : [5.0,7.5]},
    'rabbit' : {"meloxicam" : [0.6], "ketamine" : [20], "enrofloxacin 2.5 percent solution" : [10.0, 15.0, 20.0, 25.0], "enrofloxacin 5.0 percent solution" : [10.0, 15.0, 20.0, 25.0]}
}

weight_range = {"dog" : 100.0, "cat" : 15.0, "rabbit" : 15.0} # weight_range for maximum weight inputs (defensive programming for input from user)


restart = "y" # Restarts Loop 1 using input "y".
while restart == "y": # LOOP 1. Loops the following two inputs and returns premeds. Option to restart at the end using input.
    
    # LOOP 1.1. Matches input (stripped and lower case) with dictionary key.
    finished = "" # Ends loop 1.1. (Not sure if there is a better way using break? I couldn't get it to work)
    while finished == "": 
        species = raw_input("\nEnter the species as dog, cat, or rabbit: ")
        species_stripped = species.lower().strip() # more defensive programming
        for animal in rates: #LOOP 1.1.1. Looking to match the input from species with a dictionary key and then ending the loop 2.
            if species_stripped == animal or species_stripped == animal[0:1]: # The slice animal[0:1] makes it so the user can lazily enter one letter
                species_stripped = animal # user enters first letter of species (eg. d == dog). More defensive programming.
                finished = "fin" # probably some better solutions to this loop!
                
    
    # LOOP 1.2. I've no idea how this works as I googled the solution, but it checks for a float in loop 2.
    # It is more defensive programming to make sure the input from the user is okay. I need to read up on regular expressions.
    p = re.compile('\d+(\.\d+)?') 
    while True:                 
        weight = raw_input("\nEnter the weight in kilograms (eg. 500 grams is '0.5'): ")
        if (p.match(weight) != None) and (float(weight) > 0.0) and (float(weight) < weight_range[species_stripped]):
            # not sure how p.match works here, but looks for a float from the input. More reading to be done.
            break

    weight_float = float(weight) # everything that follows needs weight input to be a float
    
    print "\nRESULT FOR %.2f kg %s:" % (weight_float, species_stripped) # Trying to make the print out look easier on the eye.

    # LOOP 1.3. There are two for loops which print the premed dose for animal type.
    # The weight of animal multipled by drug dose rate, divided by drug concertration.
    # Loop 1.3.1 Starts looping the drug stored in the dictionary matched for the input from Loop 1.1 (ie. species)
    # Loop 1.3.2 Hurts my brain, but it works damn it! There is probably a more eloquent solution here.
    for drugloop in sorted(rates[species_stripped]): # LOOP 1.3.1
        for drug, number in enumerate(rates[species_stripped][drugloop]): # LOOP 1.3.2
            number = float(number)
            user_input = (weight_float * number) / float(drug_concerntrations[drugloop])
            # Result! Not sure the best way to display the information. User then uses their discretion to make a choice from the results.
            print "When using %s at dose rate %.2fml: %.2fml" % (drugloop, number, user_input) # %.2f, only need two decimal places.

    restart = raw_input("\nTO RESTART ENTER 'Y'.") # back to Loop 1.1 if 'y' is entered

    # NEXT: work out how this can be put on any computer, in a work environment, for quick and easy access.
    # Portable hard drive/USB stick type solution, or launch/download from an internet site.