in python assert and isinstance usage

assert statement is a debugging breakpoint is inserted into a program that is convenient way.

assert 3 == 3
assert 1 == True
assert (4 == 4)
print('-----------')
assert (3 == 4)
'''
AssertionError throws an exception, the back does not perform
'''
print('-----------')

 

isinstance Function Description:
When we define a class, we actually define a data type. We define data types and comes with Python data types, such as str, list, dict is no different:
to determine whether a variable is a type can be used isinstance () to determine:

class Student():
    def __init__(self, name, score):
        self.name = name
        self.score = score

a = '10'
b = 3
c = [1, 2, 3]
d = (1, 2, 3)
f = Student('Eden', 99.9)

print(isinstance(a, str)) # True
print(isinstance(b, int)) # True
print(isinstance(c, list)) # True
print(isinstance(d, tuple)) # True
print(isinstance(f, Student)) # True