Python writing to .txt alphabetically

Question

Need help cant write to file alphabetically

class_name = "class 1.txt"    #adds '.txt' to the end of the file so it can be used to create a file under the name a user specifies
with open(class_name , 'r+') as file:
    name = (name)
    file.write(str(name + " : " )) #writes the information to the file
    file.write(str(score))
    file.write('\n')
    lineList = file.readlines()
    for line in sorted(lineList):
        print(line.rstrip())

what is name and score? – Antony Hatchkins Jan 18 '16 at 19:06 — Antony Hatchkins, Jan 18 '16 at 19:06

score 0 · Answer 1 · edited May 23 '17 at 12:04

0

You need calls of file.seek to set the read/write position accordingly.

See seek() function? for some explanations.

edited May 23 '17 at 12:04

Community

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1

answered Jan 18 '16 at 19:06

jofel

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score 0 · Accepted Answer · answered Jan 18 '16 at 20:23

You should overwrite the file with the new (alphabetized) data. This is MASSIVELY easier than trying to track file.seek calls (which are measured in bytes, not lines or even characters!) and not significantly less performant.

with open(class_name, "r") as f:
    lines = f.readlines()

lines.append("{name} : {score}\n".format(name=name, score=score))

with open(class_name, "w") as f:  # re-opening as "w" will blank the file
    for line in sorted(lines):
        f.write(line)

Python writing to .txt alphabetically

2 Answers2