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POitems not appending to list, or list returning as empty in python?
 

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  1. POitems not appending to list, or list returning as empty in python?
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    <p>In my code, the item percentgrade is not appending to the list lnpercentgrade in each iteration of a for loop, but I'm not sure why. When I try to sum the items in lnpercentgrade (at the end of the code), I am returned 0 because lnpercentgrade is empy. I have lnpercentgrades declared as a global variable outside of the maininput() function, because otherwise at the bottom of the code when I try to sum(lnpercentgrades), I am returned "lnpercentgrades not defined".</p> <p>I'm guessing lnpercentgrades is not being modified somehow inside the maininput() function, even though I am sure I typed it correctly before the .append function.</p> <p>What I am really trying to do is match the sum(lnpercentgrades) with 100, but when I enter 5 items all with value of 20, the sum is 0 instead of 100.</p> <p>The important lines are marked with arrows &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;</p> <pre><code>lnpercentgrades = [] &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; def maininput(): numtests = int(input("Enter # of tests:")) numassign = int(input("Enter # of assignments:")) numquizzes = int(input("Enter # of quizzes:")) numlabs = int(input("Enter # of labs:")) l = [numtests, numassign, numquizzes, numlabs] ln = ["test", "assignments", "quizzes", "labs"] lnpercentgrades = [] &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; testwavg = None numassignwavg = None numquizzeswavg = None numlabswavg = None numfinalwavg = None lnwavg = [testwavg, numassignwavg, numquizzeswavg, numlabswavg] print(l[0]) print("Is there a separately weighted final?") yn = int(input("Enter 1 for yes. 2 for no:")) while (yn &gt; 2 or yn &lt; 1): yn = int(input("Enter 1 for yes. 2 for no, please:")) n = 4 if yn == 1: final = 1 l.append(final) ln.append("final") lnwavg.append(numfinalwavg) n = 5 for i in range (n): if l[i] &gt; 0: print("Enter % of total grade of",ln[i],":") percentgrade = float(input("")) print("you inputed:", percentgrade) lnpercentgrades.append(percentgrade) &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; percentgrade = percentgrade*.01 varscoreslist = [] for x in range(l[i]): print("Enter score of", ln[i], x+1,"as a fraction:") from fractions import Fraction inputfrac = input("") varscore = float(sum(Fraction(s) for s in inputfrac.split())) #the above converts fractional inputs to decimals varscoreslist.append(varscore) if ln[i] == "labs": score = sum(varscoreslist) else: sumscores = sum(varscoreslist) score = sumscores/l[i] lnwavg[i] = score*percentgrade maininput() print(lnpercentgrades) print("sum of percent of grades", sum(lnpercentgrades)) &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; if float(sum(lnpercentgrades)) != 100: &lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt;&lt; print("Sorry, the grade percent of each item enter did not sum to 100:") print("Program will rerun.") input("") maininput() coursegrade = sum(lnwavg) print("Your course grade is:", coursegrade) input("") </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USLazerSharks
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. COwhy not to return it as a function result - then you don't need to specify it before function
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      1. POitems not appending to list, or list returning as empty in python?
      1. USArtsiom Rudzenka
    2. CORocketDonkey already done all explanations you need
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      1. POitems not appending to list, or list returning as empty in python?
      1. USArtsiom Rudzenka
 

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