pic_count是在函数外的怎么办
时间: 2024-01-01 19:03:30 浏览: 25
如果`pic_count`是在函数外定义的全局变量,那么在函数内部使用它之前,需要使用`global`关键字声明一下,以告诉Python解释器这是一个全局变量,而不是局部变量。例如:
```python
pic_count = 0 # 在函数外定义全局变量pic_count
def your_function():
global pic_count # 使用global关键字声明pic_count为全局变量
pic_count = pic_count + len(tab_result) # 使用pic_count
your_function() # 调用函数
```
这样就可以在函数内部访问和修改全局变量`pic_count`了。请确保在函数内部使用全局变量之前进行了声明。
相关问题
解释如下代码: for ind,value in match_all_pd.iterrows(): if value.pic_id1 <= value.pic_id2: continue else: temp = value.pic_id2 match_all_pd.loc[ind,'pic_id2'] = value.pic_id1 match_all_pd.loc[ind,'pic_id1'] = temp temp = value.row_id2 match_all_pd.loc[ind,'row_id2'] = value.row_id1 match_all_pd.loc[ind,'row_id1'] = temp temp = value.col_id2 match_all_pd.loc[ind,'col_id2'] = value.col_id1 match_all_pd.loc[ind,'col_id1'] = temp match_all_pd['row_diff'] = match_all_pd['row_id2'] - match_all_pd['row_id1'] match_all_pd['col_diff'] = match_all_pd['col_id2'] - match_all_pd['col_id1'] match_all_pd = match_all_pd.sort_values(by = ['pic_id1','pic_id2']) match_all_pd = match_all_pd.drop_duplicates(subset = ['pic_id1','pic_id2','row_diff','col_diff'],keep = 'first') match_check = match_all_pd.groupby(by =['pic_id1','pic_id2','row_diff','col_diff']).count() if(len(match_check[match_check.col_id1>1])>0): print('error')
这段代码的功能是对一个名为match_all_pd的DataFrame进行处理,按照pic_id1和pic_id2排序,并删除重复项。其中pic_id1和pic_id2是两张图片的编号,row_id1和row_id2是这两张图片中的某个物体的行坐标,col_id1和col_id2是这两张图片中的某个物体的列坐标。在删除重复项之前,还计算了每个匹配对中的行坐标和列坐标的差值(row_diff和col_diff)。
具体来说,代码中使用了iterrows()函数来循环遍历DataFrame的每一行。对于每一行数据,如果pic_id1小于等于pic_id2,则跳过该行数据,否则将pic_id1和pic_id2的值互换,同时将row_id1、row_id2、col_id1和col_id2的值也互换。然后,计算row_diff和col_diff的值,并按照pic_id1和pic_id2排序,最后删除重复项。如果在删除重复项之后,仍然存在两个或更多匹配对具有相同的pic_id1、pic_id2、row_diff和col_diff值,则输出"error"。
解释代码:def subject_info(): try: '''清空select_picture文件夹''' path_s = "/root/web/source/select_picture" ls = os.listdir("/root/web/source/select_picture") for pic in ls: c_path = os.path.join(path_s,pic) os.remove(c_path) '''------------my------------''' video_path = "" question = request.form video_name = None image_name = None return_state = 400 question_count = question["question_count"] content = "question: {}" .format(question["question"]) question_count_content = "question_count: {}" .format(question["question_count"])
这段代码定义了一个名为 `subject_info()` 的函数。该函数首先尝试清空一个名为 `select_picture` 的文件夹,然后从表单中获取一个名为 `question` 的变量,并将其值赋给 `content` 变量。接着它从表单中获取另一个名为 `question_count` 的变量,并将其值赋给 `question_count` 变量。最后,该函数将 `video_name`、`image_name`、`return_state` 这三个变量的值设置为默认值 `None`、`None`、`400`,并返回 `question_count` 和 `content` 这两个变量。