? Python: most idiomatic way to convert None to empty string?

What is the most idiomatic way to do the following?def xstr(s): if s is None: return '' else: return ss = xstr(a) + xstr(b)update: I'm incorporating Tryptich's suggestion to use st
 ? String contains in Bash

Using Bash, I have a string:string = "My string"How can I test if it contains another string?if [ $string ?? 'foo' ]; then echo "It's there!"fiWhere ?? is my unknown operator. Do I use echo and grep?
 ? String contains in Bash

Using Bash, I have a string:string = "My string"How can I test if it contains another string?if [ $string ?? 'foo' ]; then echo "It's there!"fiWhere ?? is my unknown operator. Do I use echo and grep?
 ? String contains in Bash

Using Bash, I have a string:string = "My string"How can I test if it contains another string?if [ $string ?? 'foo' ]; then echo "It's there!"fiWhere ?? is my unknown operator. Do I use echo and grep?
 ? String contains in Bash

Using Bash, I have a string:string = "My string"How can I test if it contains another string?if [ $string ?? 'foo' ]; then echo "It's there!"fiWhere ?? is my unknown operator. Do I use echo and grep?
 ? Shell scripting: test if a string contains a character (including chars like '*' and '\')

This question already has an answer here: How do you tell if a string contains another string in Unix shell scripting? 11 answers
 ? Check for substring using unix make

Coding in UNIX make, I have written:cat $ sString | grep sSubstring > sResultSo I want to check if sString contains sSubString and, if it does, put the result in sResult.Background: I have put the
 ? C# Formatting - How to correctly format a name? I.e. forename or surname

I'm currently being visually assaulted by all of the names that are being displayed and entered on one of my systems. Basically, users have use of an on-screen keyboard and don't tend to write things
 ? VBScript - Capitalize first letter of each word

I am trying to convert the following string james-and-the-giant-peach to the following: James and the Giant Peach so basically swapping - for a space, and capitalizing the first letter of each word ex
 ? Alternative to if elseif in Matlab

I have a character string called name. The third character in name is a letter that indicates which month name is associated to, according to the following scheme:Jan FFeb GMar HAbr JMay KJun MJ
 ? Alternative to if elseif in Matlab

I have a character string called name. The third character in name is a letter that indicates which month name is associated to, according to the following scheme:Jan FFeb GMar HAbr JMay KJun MJ
 ? Alternative to if elseif in Matlab

I have a character string called name. The third character in name is a letter that indicates which month name is associated to, according to the following scheme:Jan FFeb GMar HAbr JMay KJun MJ
 ? How to check a pattern in a string in matlab?

I want to check if a specific pattern was in a string to do some action [filename pathname]=uigetfilefullpath=[pathname filename]In my program I will only browse for Pictures , all pictures are named
 ? How to give value of string to another string in matlab

I have a simple question. I want to calculate training heart rate.And I have some values. RHR means that resting heart rate. INTEN means fitnes level and I give values 0.55,0.65,0.8 for low, medium an
 ? Algorithm for searching withing a group of words

I have a group of words in the below format : a1 , a2, a3 , a4 b1 , b2 , b3 , b4 , b5 ..c1 , c2 ......and so on . Test case : User input : a3 Out put : a1 , a2,a3,a4 User input : b1Output : b1,b2,b3,b
 ? Algorithm for searching withing a group of words

I have a group of words in the below format : a1 , a2, a3 , a4 b1 , b2 , b3 , b4 , b5 ..c1 , c2 ......and so on . Test case : User input : a3 Out put : a1 , a2,a3,a4 User input : b1Output : b1,b2,b3,b

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