python - How to efficiently use NumPy's StringDType for string ...
Mar 23, 2025 · In the past, NumPy's string operations were somewhat slower compared to Python list comprehensions, and I was hoping that with the introduction of NumPy's StringDType (which …
python - Math operations from string - Stack Overflow
Nov 13, 2016 · Let's say I have a standard Python string (such as one obtained from raw_input()), maybe "2 + 2" for simplicity's sake. I'd like to convert this string to standard math operations in …
python - Vectorized string operations in Numpy: why are they rather ...
Mar 5, 2018 · Starting from numpy 1.4, if one needs arrays of strings, it is recommended to use arrays of dtype object_, string_ or unicode_, and use the free functions in the numpy.char module for fast …
Using "and" and "or" operator with Python strings
Also the type of the variable parameter is a string. In this context, as I can't imagine a case where usage of boolean operators on strings would make sense, I want to ask the question: Why would one want …
What is the most efficient string concatenation method in Python ...
Is there an efficient mass string concatenation method in Python (like StringBuilder in C# or StringBuffer in Java)? I found following methods here: Simple concatenation using + Using a string lis...
python - Evaluating a mathematical expression in a string - Stack …
Mar 3, 2010 · Python bytecode is a stack oriented language, so everything is a simple matter of TOS=stack.pop(); op(TOS); stack.put(TOS) or similar. The key is to only implement the opcodes that …
python - pandas - perform string operation on all elements of a …
Apr 13, 2016 · pandas - perform string operation on all elements of a column Asked 9 years, 7 months ago Modified 5 years, 11 months ago Viewed 16k times
Python string 'in' operator implementation algorithm and time ...
Aug 9, 2013 · Python string 'in' operator implementation algorithm and time complexity Asked 12 years, 4 months ago Modified 1 year, 7 months ago Viewed 22k times
How to make the python interpreter correctly handle non-ASCII ...
Aug 27, 2009 · In Python 2, you can from __future__ import unicode_literals to obtain the Python 3 behavior, but be aware this affects the entire current module. s.replace(u"Â ", u"") will also fail if s is …
Time complexity of string concatenation in Python [duplicate]
May 10, 2016 · Yes, in your case *1 string concatenation requires all characters to be copied, this is a O (N+M) operation (where N and M are the sizes of the input strings). M appends of the same word will …