assert keyword python

"""Quick note!
This code snippet has been copied by Pseudo Balls.
This is the original answer.
Please consider justice by ignoring his answer.
"""
"""assert:
evaluates an expression and raises AssertionError
if expression returns False
"""
assert 1 == 1  # does not raise an error
assert False  # raises AssertionError
# gives an error with a message as provided in the second argument
assert 1 + 1 == 3, "1 + 1 does not equal 3"
"""When line 7 is run:
AssertionError: 1 + 1 does not equal 3
"""

4
6
Rubixphys12 15320 points

                                    x = "hello"

#if condition returns False, AssertionError is raised:
assert x == "goodbye", "x should be 'hello'"
-----------------------------------------------------------------
Traceback (most recent call last):
  File "demo_ref_keyword_assert2.py", line 4, in <module>
    assert x == "goodbye", "x should be 'hello'"
AssertionError: x should be 'hello'

4 (6 Votes)
0
4.5
2
Krish 100200 points

                                    The assert keyword is used when debugging code.

The assert keyword lets you test if a condition in your code returns 
True, if not, the program will raise an AssertionError.

You can write a message to be written if the code returns False, check 
the example below.

x = "hello"

#if condition returns False, AssertionError is raised:
assert x == "goodbye", "x should be 'hello'"

4.5 (2 Votes)
0
5
1
A-312 69370 points

                                    name = 'quaid'
# check if name assigned is what assert expects else raise exception
assert(name == 'sam'), f'name is {name}, it should be sam'

print("Hello {check_name}".format(check_name = name))
#output: Assertion Error 
# quaid is not what assert expects rather it expects sam as a string assigned to name variable
# No print out is received

5 (1 Votes)
0
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