Truncate A String To A Specific Number Of Bytes In Python

How can I truncate a string to be no longer than 50 bytes? a = 'asdfzx안녕하세요awelkjawletjawetr방갑습니다.dlgawklejtwgasdgsdfgd sdfasdfsdafa궁금해요rewgargasregaw

Solution 1:

You could just use slicing if you are using a one character per byte encoding:

a = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'

a[:50]
'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'

Note that would only makes sense if you are writing this somewhere. If the size of the python object representation makes more sense in your use-case, the answer of @Achilles should works.

Solution 2:

You can use getsizeof() to get the size and then put it in a if statement to check.getsizeof() returns the size of an object in bytes.Hope my example gives you an idea :

from sys importgetsizeofa='4200547985984359347509gbrtbhrtbrtbargrefefwefwef'
b =  'hello'ifgetsizeof(a.encode('ascii')) > 50 :
    print("Error:a")
ifgetsizeof(b.encode('ascii')) > 50 :
    print("Error:b")