Python 提示 NameError: name 'mtx' is not defined

当我window.py文件调用main.py文件（已经form main import*）然后运行window.py文件时，报出代码 NameError: name 'mtx' is not defined，mtx为main文件内

错误代码位置去畸变中的 mtx 另外还有几处也用到了mtx

def process_image(img):
# 图像去畸变
undistort_img = img_undistort(img, mtx, dist)
# 车道线检测
rigin_pipline_img = pipeline(undistort_img)
# 透视变换
transform_img = img_perspect_transform(rigin_pipline_img, M)
# 拟合车道线
left_fit, right_fit = cal_line_param(transform_img)
# 绘制安全区域
result = fill_lane_poly(transform_img, left_fit, right_fit)
transform_img_inv = img_perspect_transform(result, M_inverse)

报错为

Traceback (most recent call last):
File "C:\Users\admin.conda\envs\py11\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Users\admin.conda\envs\py11\lib\threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "C:/Users/admin/Desktop/511/yolov5/laneDection/window.py", line 525, in detect_vid
frame = process_image(frame1)
File "C:\Users\admin\Desktop\511\yolov5\laneDection\main.py", line 320, in process_image
undistort_img = img_undistort(img, mtx, dist)
NameError: name 'mtx' is not defined

我声明了一次全局变量 还是出错

大佬帮帮忙能让我window.py文件可以调用main.py文件中的代码就行

window.py 加上from main import mtx

'mtx'变量没有定义
检查下form main import *
是不是导入正确