use variable in a string python code example

Example 1: how to use a string variable as a variable name in python

#works only inside classes
name  = 'varname'
value = 'something'

setattr(self, name, value) #equivalent to: self.varname= 'something'

print (self.varname)
#will print 'something'

Example 2: how to use variables in string in python

#Use f-string
#Example:

x = 2
y = f'This is a string using variable x: {x}'
print(y)

#Output: 
#This is a string using variable x: 2

Example 3: how to create a variable in python

variable1 = "value" # string
variable2 = 1000000 # integer
variable3 = 10000.0 # real/float
variable4 = True # boolean: True or False

Example 4: embed variables python

#Pre 3.6
print('Hi, my name is {name} and my age is {age}'.format(**locals()))

#After 3.6
print('Hi, my name is {name} and my age is {age}')