Python strip () method for removing head and tail of the specified character string (line feed spaces or default) or character sequence.
Note: This method can only delete the beginning or end of the character, the character can not be deleted middle part.
Example:
Has been previously understood to be end to end '12' was removed, only later to be understood to know: strip the filter is split into a string of characters, the characters one by one and then filtered and trailing
It is simply:
De novo look: The first character '1' is contained in the '12' in the removed; second character "2" is contained in the '12' in the removed; third character '3' is not contained in the '12' was not removed, and stop there;
From the point of view tail: a penultimate character '1' is contained in the '12' in the removed; penultimate character '2' is contained in the '12' in the removed; antepenultimate characters '3' is free in the '12' was not removed, and stop there;