This question already has answers here:
What does `<>` mean in Python?
(5 answers)
Closed 9 years ago.
So, I'm making a python cheat sheet for myself, and when I started covering comparison operators, I noticed these two:
a = 1
b = 2
if a != b:
print("Dunno")
if a <> b:
print("Dunno")
I'm using python 2.7 and was curious if there's a difference between the two operators?
As described in the documentation, they are the same. <> is deprecated and was removed in Python 3, so you should use !=.
<> is deprecated. Other than that, no.
Related
This question already has answers here:
What is print(f"...")
(7 answers)
Closed 2 years ago.
(Python Guess the Number)
where this f come from? or what does this f means?
Here is the code:
guess = int(input(f 'Guess a number between 1 and {x}: '))
Thats a representation called f-string, they started supporting them in Python 3.6
https://realpython.com/python-f-strings/
A string with an 'f' in the beginning is called an f-string. It is one of the new python 3.6 features. You can read more about it in these links:
Tutorial on Python 3's f-strings
Official Documentation from python.org
This question already has an answer here:
Preincrement operators in python
(1 answer)
Closed 5 years ago.
I am a beginner in python and I am using Python 3.5. The python console complains invalid syntax for the below statement:
a = 5
print(a++)
But print(++a) works fine. Can anyone help me understand the difference?
Btw, it seems that print(a+=1) also doesn't work.
Thanks!
++a is just the same as doing (+(+a)). I.E: You're using the mathematical addition operator on the variable a (with implied zeroes). So the result is a
a++ is not valid python syntax (unlike other languages).
a += 1 is an assignment. It is equivalent to a = a + 1 - you can not print an assignment
This question already has answers here:
What is the difference between != and <>? [duplicate]
(3 answers)
Closed 6 years ago.
As I know using "<>" is deprecated for using inequality and "!=" operator should be used for this purpose.
Is it just a style difference or there is a difference in functionality?
They are exactly the same, though <> is deprecated like you said:
<> and != are alternate spellings for the same operator. != is the preferred spelling; <> is obsolescent.
This question already has answers here:
How do I create a constant in Python?
(44 answers)
Closed 7 years ago.
Sometime there is a need to define constant numeric values to be used across our application.
For instance in C language I used to do thing like:
#define PI = 3.14
#define MIN = 0
#define MAX = 256
What is the equivalent in Python?
[Edit:] To the down voters. The question is not related to syntax. I'm interested in understanding conventions and doing things right in the Python philosophy.
There is no really equivalent in Python: just convention: uppercase!
If you write:
CST = 10
Everyone know that you don't have to change it…
This question already has answers here:
What does `<>` mean in Python?
(5 answers)
Closed 8 years ago.
I just saw some code using the <> operator (don't know what this is called) instead of the != operator in Python. Is there any difference between the two or do they mean the same thing? What's the <> operator called? Thanks.
The <> operator is considered obsolete:
https://docs.python.org/2/reference/expressions.html#not-in