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Trim the center of a string

Author:
grillermo
Posted:
December 5, 2012
Language:
Python
Version:
1.4
Tags:
python string slice
Score:
0 (after 0 ratings)

I had to build unique strings for a payment system and i wanted to make them kindof friendly so i generated them with usernames and datetimes(safe enough uniqueness in combo), some usernames are long and they break the limit of this payment system so i thought i should cut the center of the string so it stills has a part of the username and a part of the datetime, the most changing part of the datetime is of course the last part, as microseconds vary rapidly. So i wrote this little function to cut the center of a string i thought it cute so i leave it here. Pay attention to the comment so you can see what is going on.

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def trim_center_of_string(string,max_size):
    ''' 
    String: hellogoodbye 
    max_size: 8
    return hellbyes
    '''
    if len(string) >= max_size:
        # lets trim the center our long string
        length = len(string)
        excess = len(string) - max_size 
        left_imit = (length/2)-(excess/2)  # hell|os&goodbyes
        right_limit = left_imit+excess     # hellos&good|byes
        left_part = string[:left_imit]     # hell|
        right_part = string[right_limit:-1]# |byes
        string = left_part+right_part      # hellbyes
    return string

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