How to change the global value of a parameter when using a function in python-CodePudding

This is what I want to achieve

Variable=0
Some_function(Variable)
print (Variable)

I want the output to be 1 (or anything else but 0)

I tried using global by defining some_function like this, but it gave me an error "name 'Variable' is parameter and global"

def Some_function(Variable):
    x=Variable 1
    global Variable
    Variable=x

CodePudding user response：

You are using Variable as your global variable and as function parameter.

Try:

def Some_function(Var):
    x=Var 1
    global Variable
    Variable=x

Variable=0
Some_function(Variable)
print (Variable)

CodePudding user response：

You should not use the same name for parameter and the globale variable

CodePudding user response：

The error message seem clear enough. Also, you wouldn't need to pass Variable as a parameter if you are using a global.

If you define

def f():
    global x
    x  = 1

Then the following script should not output an error :

x = 1 # global
f(x)
print(x) # outputs 2

Another possibility :

def f(y):
    return y 1

Which you can use like this :

x = 1
x = f(x)
print(x) # 2

CodePudding user response：

If you want to modify global variable, you should not use that name as function parameter.

var = 0

def some_func():
    global var
    var  = 1

some_func()
print(var)

Just use global keyword and modify variable you like.

CodePudding user response：

Variable = 0
def some_function(Variable):
    global x
    x = Variable   1

some_function(Variable)
Variable = x
print(Variable)