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If you need to add two strings, you have to use the '+' operator. Hence. msg['Subject'] = 'your string' + sys.argv[1] And also you have to import sys in the beginning. As. import sys. msg['Subject'] = "Auto Hella Restart Report " + sys.argv[1] edited Mar 27, 2022 at 16:34. Peter Mortensen.
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 list and the join method; Using UserString from the MutableString module; Using a character array and the array module; Using cStringIO from the StringIO ...
The OP asked for Python 2.4 but about version 2.7, Hatem Nassrat has tested (July 2013) three concatenation techniques where + is faster when concatenating less than 15 strings but he recommends the other techniques: joinand %. (this current comment is just to confirm the @tonfa's comment above).
Sep 17, 2012 · Your recommendation uses a function from Lib/string.py which is wholly different and deprecated whereas @BurhanKhalid answer uses the built-in string method which is not deprecated. His answer is the most correct one now and going forward whereas this is only good for now on 2.x.
Nov 23, 2011 · 33. This question already has answers here: Most Pythonic way to concatenate strings [duplicate] (6 answers) Closed 10 years ago. I need to "concatenate to a string in a for loop". To explain, I have this list: list = ['first', 'second', 'other'] And inside a for loop I need to end with this: endstring = 'firstsecondother'.
List comprehensions excel in string manipulation, because string operations are inherently hard to vectorize, and most pandas "vectorised" functions are basically wrappers around loops. I have written extensively about this topic in For loops with pandas - When should I care?. In general, if you don't have to worry about index alignment, use a ...
Dec 16, 2015 · To split a long string to multiple lines surround the parts with parentheses (()) or use a multi-line string (a string surrounded by three quotes """ or ''' instead of one). 1. Solution: Parentheses. With parentheses around your strings you can even concatenate them without the need of a + sign in between: a_str = (f"This is a line \n{str1}\n".
Sep 17, 2013 · 1. Statement 3 doesn't work as when you concatenate two string expressions to create a new string you need a '+' operator. whereas in case of sting 1,2 and 4, adjacent literals separated by white spaces use different quoting conventions.Hence they are allowed making them print same as their concatenation. also, there won't be any significant or ...
Nov 19, 2018 · 4. It is possible, but it's not very Pythonic: something = a + b + c * condition. This will work because condition * False will return '', while condition * True will return original condition. However, You must be careful here, condition could also be 0 or 1, but any higher number or any literal will break the code.
As the following figure shows, vectorized concatenation (via +) is fastest if the strings being concatenated are short such as in the OP. However, if the strings are long (e.g. each cell contains a tweet or a book excerpt), then an explicit Python loop (use f-string in a list comprehension) is the fastest. Code to reproduce the above figure:
