how to use concatenate a fixed string and a variable in Python

Question

I want to include file name  main txt  in the subject for that I am passing file name from command line   but getting error in doing so  python sample py main txt  running python with argument   msg  Subject      Auto Hella Restart Report  sys argv 1    line where i am using that passed argument

User · Answer

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]

User · Answer

variable   Hello       print  variable    print  This is the Test File   variable      for integer type        variable    10    print  variable    print  This is the Test File   str variable

User · Answer

I know this is a little old but I wanted to add an updated answer with f-strings which were introduced in Python version 3 6   msg  Subject     f Auto Hella Restart Report  sys argv 1

User · Answer

With python 3 6    msg  Subject     f Auto Hella Restart Report  sys argv 1

User · Answer

Try   msg  Subject      Auto Hella Restart Report     sys argv 1    The   operator is overridden in python to concatenate strings

User · Answer

I m guessing that you meant to do this   msg  Subject      Auto Hella Restart Report     sys argv 1    To concatenate strings in python  use

[python] how to use concatenate a fixed string and a variable in Python

Examples related to python

Examples related to string-concatenation