python - why variable doesn't store stuff when inside a def funct -

i'm new programming! when do:

>>>x = "heyy" >>>def hello():        x = "hi" >>>hello() >>>print(x) heyy

why x still "heyy"? there anyway can turn x = hi global variable? without using "return" , putting new variable? like:

>>>x = "heyy" >>>def hello():     x = "hi"     return x >>>y = hello() >>>print(y) hi

basically want change contents of x hi instead of heyy when run hello()

you can use global keyword so

def hello():    global x    x = "hi"

but note bad practice , return should used ever possible. because there every chance of value of variable getting corrupted in of methods

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