how to check if value is a number in python code example

Example 1: python check if number

if type(variable) == int or type(variable) == float:
    isNumber = True

Example 2: is number python

var.isdigit()
#return true if all the chars in the string are numbers
#return false if not all the chars in the string are numbers

Example 3: check if a string is float python

try:
    float(element)
except ValueError:
    print "Not a float"