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POwhats another way to write python3 zip
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copied!<p>Ive been working on a code that reads lines in a file document and then the code organizes them. However, i got stuck at one point and my friend told me what i could use. the code works but it seems that i dont know what he is doing at line 7 and 8 FROM THE BOTTOM. I used #### so you guys know which lines it is.</p> <p>So, essentially how can you re-write those 2 lines of codes and why do they work? I seem to not understand dictionaries from sys import argv</p> <pre><code>filename = input("Please enter the name of a file: ") file_in=(open(filename, "r")) print("Number of times each animal visited each station:") print("Animal Id Station 1 Station 2") animaldictionary = dict() for line in file_in: if '\n' == line[-1]: line = line[:-1] (a, b, c) = line.split(':') ac = (a,c) if ac not in animaldictionary: animaldictionary[ac] = 0 animaldictionary[ac] += 1 alla = [] for key, value in animaldictionary: if key not in alla: alla.append(key) print ("alla:",alla) allc = [] for key, value in animaldictionary: if value not in allc: allc.append(value) print("allc", allc) for a in sorted(alla): print('%9s'%a,end=' '*13) for c in sorted(allc): ac = (a,c) valc = 0 if ac in animaldictionary: valc = animaldictionary[ac] print('%4d'%valc,end=' '*19) print() print("="*60) print("Animals that visited both stations at least 3 times: ") for a in sorted(alla): x = 'false' for c in sorted(allc): ac = (a,c) count = 0 if ac in animaldictionary: count = animaldictionary[ac] if count >= 3: x = 'true' if x is 'true': print('%6s'%a, end=' ') print("") print("="*60) print("Average of the number visits in each month for each station:") #(alla, allc) = #for s in zip(*animaldictionary.keys()): # (alla,allc).append(s) #print(alla, allc) (alla,allc,) = (set(s) for s in zip(*animaldictionary.keys())) ##### how else can you write this ##### how else can you rewrite the next code print('\n'.join(['\t'.join((c,str(sum(animaldictionary.get(ac,0) for a in alla for ac in ((a,c,),))//12)))for c in sorted(allc)])) print("="*60) print("Month with the maximum number of visits for each station:") print("Station Month Number") print("1") print("2") </code></pre>

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