+- Python Forum (https://python-forum.io)
+-- Forum: Python Coding (https://python-forum.io/forum-7.html)
+--- Forum: General Coding Help (https://python-forum.io/forum-8.html)
+--- Thread: what does x reprsent in this code ? (/thread-25722.html)
what does x reprsent in this code ? - astral_travel - Apr-09-2020
thisset = {"apple", "banana", "cherry"}
for x in thisset:
print(x)
RE: what does x reprsent in this code ? - pyzyx3qwerty - Apr-09-2020
x basically represents all the items in the set, and prints them out.
RE: what does x reprsent in this code ? - astral_travel - Apr-09-2020
but the thing is i can change it to anything...i can even call it 'you' or 'she'...and it will act on it in the same way - the set it still being printed...
RE: what does x reprsent in this code ? - buran - Apr-09-2020
yes,
x is variable, or name as we call them in python.you iterate over a set in the for loop and in each iteration
x takes the value from the set
RE: what does x reprsent in this code ? - astral_travel - Apr-09-2020
okay, got it !
thanks !
RE: what does x reprsent in this code ? - snippsat - Apr-09-2020
Yes the loop variable can be called whatever you want.
The only job it has is to take on the value of the next element in
iterable each time through the loop.A general rule if the
iterable data collection has some stuff that can be given useful loop variable name,then do that.>>> colors = ['Red', 'Blue', 'Green'] >>> for color in colors: ... print(color) ... Red Blue GreenIs clearer than.
>>> colors = ['Red', 'Blue', 'Green'] >>> for rubberduck in colors: ... print(rubberduck) ... Red Blue Green
RE: what does x reprsent in this code ? - astral_travel - Apr-09-2020
thank you too !
certainly that is a better habit...
pyzyx3qwerty thank you !
RE: what does x reprsent in this code ? - astral_travel - Apr-10-2020
another one which is simple, but i'm trying to understand the underlying theme...
how can this function be defined with 'food' and when it is called it is given the list argument ?
def my_function(food):
for x in food:
print(x)
fruits = ["apple", "banana", "cherry"]
my_function(fruits)
RE: what does x reprsent in this code ? - buran - Apr-10-2020
in the function definition (line 1)
food is a parameter.when you call the function on line 7, you pass
fruits as arguments to the function. That is the actual value of food in this particular call of the function.There are positional and keyword parameters/arguments. check the links for more details. In this case
food is positional parameter.read our tutorial on functions: https://python-forum.io/Thread-Basic-Functions
also glossary for parameters and arguments
RE: what does x reprsent in this code ? - pyzyx3qwerty - Apr-11-2020
food is one of the things defined under the function. You will frequently see that as you go through functions.
So, for example:
def abc(name): print(name)In the above lines, name is one of the parameters. Now,
n = "pyzyx3qwerty" abc(n)in the above lines, it will n out because n represents name in the lines