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Why does this always show an error at the curses.wrapper(main) line? Please someone fix this!

–2 votes
asked Mar 17 by Костадин Клемов (260 points)
import curses
import random

def menu(root, current_row):
    curses.init_pair(1, curses.COLOR_BLACK, curses.COLOR_WHITE)
    
    height, width = root.getmaxyx()
    
    menu = ["Option 1", "Option 2", "Option 3", "Option 4"]
    
    for idx, element in enumerate(menu):
        y = height // 5 * idx
        x = width // 5
        
        if idx == current_row:
            root.attron(curses.color_pair(1))
            root.addstr(y, x, element)
            root.attroff(curses.color_pair)
            
        else:
            root.addstr(y, x, element)
        
        root.addstr(y, x, element)
        
    root.refresh()
    
def main(root):
    curses.curs_set(0)
    current_row = 0
    
    menu(root, current_row)

    while True:
        key = root.getch()
        
        if key == curses.KEY_UP and current_row > 0:
            current_row -= 1
        
        elif key == curses.KEY_DOWN and current_row > 3:
            current_row += 1
        
        elif key == ord("e"):
            break
        
        elif key == ord("q"):
            break
        
        menu(root, current_row)
    
    root.refresh(main)
    
curses.wrapper()

1 Answer

0 votes
answered Mar 17 by xDELLx (7,630 points)

The error ,for me ,shows which file was complaining.

Checking file /usr/lib/python3.8/curses/__init__.py shows the wrapper method needs a function which will be triggered by curses on startup. I added "main" as parameter & it went fine from there.

Changes --->  curses.wrapper(main)

Also changed line 18 from shown below

 18             #root.attroff(curses.color_pair)
 19             root.attroff(0)
commented Mar 18 by Костадин Клемов (260 points)
can you please send me the whole code?
commented Mar 19 by xDELLx (7,630 points)
import curses
import random

def menu(root, current_row):
    curses.init_pair(1, curses.COLOR_BLACK, curses.COLOR_WHITE)
    
    height, width = root.getmaxyx()
    
    menu = ["Option 1", "Option 2", "Option 3", "Option 4"]
    
    for idx, element in enumerate(menu):
        y = height // 5 * idx
        x = width // 5
        
        if idx == current_row:
            root.attron(curses.color_pair(1))
            root.addstr(y, x, element)
            #root.attroff(curses.color_pair)
            root.attroff(0)
            
        else:
            root.addstr(y, x, element)
        
        root.addstr(y, x, element)
        
    root.refresh()
    
def main(root):
    curses.curs_set(0)
    current_row = 0
    
    menu(root, current_row)

    while True:
        key = root.getch()
        
        if key == curses.KEY_UP and current_row > 0:
            current_row -= 1
        
        elif key == curses.KEY_DOWN and current_row > 3:
            current_row += 1
        
        elif key == ord("e"):
            break
        
        elif key == ord("q"):
            break
        
        menu(root, current_row)
    
    root.refresh(main)
    
curses.wrapper(main)
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