I am a beginner in Python. I want to source the file which has a variable value. I am sourcing the variable value using command line argument option. I want to use this variable as a path parameter to source my file. I am saying it to the variable. Below is the code I am trying.
folder_name = 'abc'
execfile("/a/b/c/folder_name")
and I am expecting it will take the value of folder_name as abc and execute the file as
execfile("/a/b/c/abc")
This can be done either with string concatenation, or with format - the latter being safer/better:
execfile("/a/b/c/" + folder_name)
execfile("/a/b/c/{}".format(folder_name)
For more info on format, see PyFormat
However you might want to consider if execfile is the right approach here! Other data formats can be a better option - e.g. pickle, json or yaml.
You could use .format() whenever you need to insert variable name into string:
execfile("/a/b/c/{0}".format(folder_name))
Note that {0} here corresponds to first argument that you pass to format function.
Similarly, {1}, {2},... corresponds to second, third,.. arguments of format function respectively.
You could also use % operator, but note that it is deprecated as of Python 3.1.
As you say you are a beginner in Python then you should change your approach and should not use execfile
Instead consider using pickle or json.load to store data
You need something like this:
folder_name = 'abc'
execfile("/a/b/c/{folder_name}".format(folder_name=folder_name))
execfile("/a/b/c/{}".format(folder_name))