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#1
February 20th, 2004, 11:36 AM
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file.seek in append mode
greets
i have some text that i update.the data consists of a few strings,printed to the file as one line.now when i write the file for the first time,i can use file.seek() to controll where on the line a string goes.but when i try to do it in append mode,it just writes the strings right next to each other on the line.i am trying to make the file a little easier on the eye when its viewed(the strings aligned vertically).i want something like Code:
string1 string2222222 string3 string1 string22222 string3 string1 string2222222222 string3 but this is what im getting Code:
string1 string2 string3 string1string2string3 string1string2string3 i tried some thing like p=file.tell() p=(p+20) file.seek(p) file.write but it doesnt work.can anyone show me a example of something similar to what i want to do?
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#2
February 20th, 2004, 01:57 PM
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The best way to do this is by padding the string to be writen to the file apropriatly. For this i'd use the ljust() string method i.e.
Code:
>>> format = file('file.txt', 'a')
>>> format.write('string 1'.ljust(20))
>>> format.write('string 2'.ljust(20))
>>> format.write('string 3\n')
>>> format.write('string 4'.ljust(20))
>>> format.write('string 5'.ljust(20))
>>> format.write('string 6\n')
>>> format.write('string 7'.ljust(20))
>>> format.write('string 8'.ljust(20))
>>> format.write('string 9\n')
>>> format.close()
>>>
Hope this helps  ,Mark.
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