local variable 'seq' referenced before assignment
时间: 2023-10-23 10:20:37 浏览: 29
This error occurs when you try to use a variable before it has been assigned a value. In the case of the error message "local variable 'seq' referenced before assignment", it means that you are trying to use the variable 'seq' before it has been assigned a value within the scope of the function.
For example, consider the following code:
```
def my_function():
print(seq)
seq = [1, 2, 3]
```
In this function, we are trying to print the value of the variable 'seq' before it has been assigned a value. To fix this error, we need to assign a value to 'seq' before we try to use it:
```
def my_function():
seq = [1, 2, 3]
print(seq)
```
Now, when we call the function, it will assign a value to 'seq' before trying to print it, and the error will be resolved.
It's important to note that this error message can also occur if you have assigned a value to 'seq' outside of the scope of the function, but the function is not able to access it. In this case, you would need to pass 'seq' as an argument to the function or make it a global variable.