Python concatenate string with string variable having escape characters

Question

I had a command in python script as below:

start_command = [
        "load=" + location + "/lib/abc " + "conf=myconf " +
        location + "/bin/mysqld "
        "--defaults-file=" + location + "/var/myfile.cnf " 
        ]

I want to push the second part of the code as a variable(connect_str) & concatenate in start command. but it's not working . Is this because of escape character?

 connect_str="conf=myconf " +
        location + "/bin/mysqld "
        "--defaults-file=" + location + "/var/myfile.cnf "
 start_command = [
        "load=" + location + "/lib/abc " + connect_str

Miguel Bustamante · Accepted Answer · 2021-01-05 03:16:02Z

1

Yes, using \ to scape \n

connect_str = "conf=myconf " + location + \
    " /bin/mysqld " "--defaults-file=" + location + \
    " /var/myfile.cnf "

answered Jan 5, 2021 at 3:16

Miguel Bustamante

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Miguel Bustamante · Accepted Answer · 2021-01-04 21:38:01Z

1

if u want concatenate str its should be str , i see a list in your code, and no escape character is this \ in your there are /. I recommend you to use format is much better like this

connect_str="conf=myconf {} /bin/mysqld --defaults-file={} /var/myfile.cnf ".format(location,location)

answered Jan 4, 2021 at 21:38

Miguel Bustamante

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Comments

dbNovice · Accepted Answer · 2021-01-04 19:56:03Z

0

My mistake was in declaring the string variable which i changed & made it work. It was actually annotation issue due to putting in multiple lines.

connect_str="conf=myconf " + location + "/bin/mysqld " "--defaults-file=" + location + "/var/myfile.cnf "
 start_command = [
        "load=" + location + "/lib/abc " + connect_str
          ]

Is there any better way to resolve the issue rather than putting it in single line?

answered Jan 4, 2021 at 19:56

dbNovice

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