Quick recap

reading and writing from files



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# read from file
with open("data/mydata.txt") as f:
    for line in f:
        print(line.strip())



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# write to file
with open( "out.txt", "w" ) as out:
    out.write("hello")

Session 2.4

Delimited files



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# example in data/mydata.txt (tab delimited)
# read into a dictionary (more convenient structure)
results = []
with open('data/mydata.txt') as f:
    header = f.readline()
    for line in f:
        idx, org, score = line.split()
        #print(idx, org, score)
        row = {'index': int(idx), 'organism': org, 'score': float(score)}
        #print(row)
        results.append(row)
print(results)



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# write results into a comma separated file
with open('mydata.csv', 'w') as out:
    out.write('index,organism,score\n')
    for r in results:
        out.write('{},{},{}\n'.format(r['index'], r['organism'], r['score']))