python - How can strings be concatenated?

Question

How to concatenate strings in python?

For example:

Section = 'C_type'

Concatenate it with Sec_ to form the string:

Sec_C_type

Answer 1

The easiest way would be

Section = 'Sec_' + Section

But for efficiency, see: https://waymoot.org/home/python_string/

Answer 2

you can also do this:

section = "C_type"
new_section = "Sec_%s" % section

This allows you not only append, but also insert wherever in the string:

section = "C_type"
new_section = "Sec_%s_blah" % section

Answer 3

Just a comment, as someone may find it useful - you can concatenate more than one string in one go:

>>> a='rabbit'
>>> b='fox'
>>> print '%s and %s' %(a,b)
rabbit and fox

Answer 4

More efficient ways of concatenating strings are:

join():

Very efficent, but a bit hard to read.

>>> Section = 'C_type'  
>>> new_str = ''.join(['Sec_', Section]) # inserting a list of strings 
>>> print new_str 
>>> 'Sec_C_type'

String formatting:

Easy to read and in most cases faster than '+' concatenating

>>> Section = 'C_type'
>>> print 'Sec_%s' % Section
>>> 'Sec_C_type'

Answer 5

Use + for string concatenation as:

section = 'C_type'
new_section = 'Sec_' + section

Answer 6

To concatenate strings in python you use the "+" sign

ref: http://www.gidnetwork.com/b-40.html

Answer 7

For cases of appending to end of existing string:

string = "Sec_"
string += "C_type"
print(string)

results in

Sec_C_type