主要代码规整化

check_proxy.py

@@ -3,7 +3,8 @@ def check_proxy(proxies):
     import requests
     proxies_https = proxies['https'] if proxies is not None else '无'
     try:
-        response = requests.get("https://ipapi.co/json/", proxies=proxies, timeout=4)
+        response = requests.get("https://ipapi.co/json/",
+                                proxies=proxies, timeout=4)
         data = response.json()
         print(f'查询代理的地理位置，返回的结果是{data}')
         if 'country_name' in data:
@@ -21,9 +22,11 @@ def check_proxy(proxies):
 
 def auto_update():
     from toolbox import get_conf
-    import requests, time, json
+    import requests
+    import time
+    import json
     proxies, = get_conf('proxies')
-    response = requests.get("https://raw.githubusercontent.com/binary-husky/chatgpt_academic/master/version", 
+    response = requests.get("https://raw.githubusercontent.com/binary-husky/chatgpt_academic/master/version",
                             proxies=proxies, timeout=1)
     remote_json_data = json.loads(response.text)
     remote_version = remote_json_data['version']
@@ -31,11 +34,12 @@ def auto_update():
         new_feature = "新功能：" + remote_json_data["new_feature"]
     else:
         new_feature = ""
-    with open('./version', 'r', encoding='utf8') as f: 
+    with open('./version', 'r', encoding='utf8') as f:
         current_version = f.read()
         current_version = json.loads(current_version)['version']
     if (remote_version - current_version) >= 0.05:
-        print(f'\n新版本可用。新版本:{remote_version}，当前版本:{current_version}。{new_feature}')
+        print(
+            f'\n新版本可用。新版本:{remote_version}，当前版本:{current_version}。{new_feature}')
         print('Github更新地址:\nhttps://github.com/binary-husky/chatgpt_academic\n')
         time.sleep(3)
         return
@@ -44,8 +48,8 @@ def auto_update():
 
 
 if __name__ == '__main__':
-    import os; os.environ['no_proxy'] = '*' # 避免代理网络产生意外污染
+    import os
+    os.environ['no_proxy'] = '*'  # 避免代理网络产生意外污染
     from toolbox import get_conf
     proxies, = get_conf('proxies')
     check_proxy(proxies)
-    

config.py

@@ -11,10 +11,10 @@ if USE_PROXY:
     # [端口] 在代理软件的设置里找。虽然不同的代理软件界面不一样，但端口号都应该在最显眼的位置上
 
     # 代理网络的地址，打开你的科学上网软件查看代理的协议(socks5/http)、地址(localhost)和端口(11284)
-    proxies = { 
+    proxies = {
         #          [协议]://  [地址]  :[端口]
-        "http":  "socks5h://localhost:11284", 
-        "https": "socks5h://localhost:11284", 
+        "http":  "socks5h://localhost:11284",
+        "https": "socks5h://localhost:11284",
     }
 else:
     proxies = None
@@ -25,7 +25,7 @@ else:
 CHATBOT_HEIGHT = 1115
 
 # 窗口布局
-LAYOUT = "LEFT-RIGHT" # "LEFT-RIGHT"（左右布局） # "TOP-DOWN"（上下布局）
+LAYOUT = "LEFT-RIGHT"  # "LEFT-RIGHT"（左右布局） # "TOP-DOWN"（上下布局）
 
 # 发送请求到OpenAI后，等待多久判定为超时
 TIMEOUT_SECONDS = 25
@@ -46,4 +46,5 @@ API_URL = "https://api.openai.com/v1/chat/completions"
 CONCURRENT_COUNT = 100
 
 # 设置用户名和密码（相关功能不稳定，与gradio版本和网络都相关，如果本地使用不建议加这个）
-AUTHENTICATION = [] # [("username", "password"), ("username2", "password2"), ...]
+# [("username", "password"), ("username2", "password2"), ...]
+AUTHENTICATION = []

core_functional.py

@@ -4,6 +4,7 @@
 # 默认按钮颜色是 secondary
 from toolbox import clear_line_break
 
+
 def get_core_functions():
     return {
         "英语学术润色": {
@@ -11,12 +12,12 @@ def get_core_functions():
             "Prefix":   r"Below is a paragraph from an academic paper. Polish the writing to meet the academic style, " +
                         r"improve the spelling, grammar, clarity, concision and overall readability. When necessary, rewrite the whole sentence. " +
                         r"Furthermore, list all modification and explain the reasons to do so in markdown table." + "\n\n",
-            # 后语 
+            # 后语
             "Suffix":   r"",
             "Color":    r"secondary",    # 按钮颜色
         },
         "中文学术润色": {
-            "Prefix":   r"作为一名中文学术论文写作改进助理，你的任务是改进所提供文本的拼写、语法、清晰、简洁和整体可读性，" + 
+            "Prefix":   r"作为一名中文学术论文写作改进助理，你的任务是改进所提供文本的拼写、语法、清晰、简洁和整体可读性，" +
                         r"同时分解长句，减少重复，并提供改进建议。请只提供文本的更正版本，避免包括解释。请编辑以下文本" + "\n\n",
             "Suffix":   r"",
         },

crazy_functional.py

@@ -1,4 +1,5 @@
-from toolbox import HotReload # HotReload 的意思是热更新，修改函数插件后，不需要重启程序，代码直接生效
+from toolbox import HotReload  # HotReload 的意思是热更新，修改函数插件后，不需要重启程序，代码直接生效
+
 
 def get_crazy_functions():
     ###################### 第一组插件 ###########################
@@ -81,7 +82,8 @@ def get_crazy_functions():
         "[仅供开发调试] 批量总结PDF文档": {
             "Color": "stop",
             "AsButton": False,  # 加入下拉菜单中
-            "Function": HotReload(批量总结PDF文档) # HotReload 的意思是热更新，修改函数插件代码后，不需要重启程序，代码直接生效
+            # HotReload 的意思是热更新，修改函数插件代码后，不需要重启程序，代码直接生效
+            "Function": HotReload(批量总结PDF文档)
         },
         "[仅供开发调试] 批量总结PDF文档pdfminer": {
             "Color": "stop",
@@ -109,9 +111,5 @@ def get_crazy_functions():
     except Exception as err:
         print(f'[下载arxiv论文并翻译摘要] 插件导入失败 {str(err)}')
 
-
-
     ###################### 第n组插件 ###########################
     return function_plugins
-
-

theme.py

@@ -1,4 +1,4 @@
-import gradio as gr 
+import gradio as gr
 
 # gradio可用颜色列表
 # gr.themes.utils.colors.slate (石板色)
@@ -24,14 +24,16 @@ import gradio as gr
 # gr.themes.utils.colors.pink (粉红色)
 # gr.themes.utils.colors.rose (玫瑰色)
 
+
 def adjust_theme():
-    try: 
+    try:
         color_er = gr.themes.utils.colors.fuchsia
-        set_theme = gr.themes.Default( 
-                        primary_hue=gr.themes.utils.colors.orange,
-                        neutral_hue=gr.themes.utils.colors.gray,
-                        font=["sans-serif", "Microsoft YaHei", "ui-sans-serif", "system-ui", "sans-serif", gr.themes.utils.fonts.GoogleFont("Source Sans Pro")], 
-                        font_mono=["ui-monospace", "Consolas", "monospace", gr.themes.utils.fonts.GoogleFont("IBM Plex Mono")])
+        set_theme = gr.themes.Default(
+            primary_hue=gr.themes.utils.colors.orange,
+            neutral_hue=gr.themes.utils.colors.gray,
+            font=["sans-serif", "Microsoft YaHei", "ui-sans-serif", "system-ui",
+                  "sans-serif", gr.themes.utils.fonts.GoogleFont("Source Sans Pro")],
+            font_mono=["ui-monospace", "Consolas", "monospace", gr.themes.utils.fonts.GoogleFont("IBM Plex Mono")])
         set_theme.set(
             # Colors
             input_background_fill_dark="*neutral_800",
@@ -77,10 +79,12 @@ def adjust_theme():
             button_cancel_text_color=color_er.c600,
             button_cancel_text_color_dark="white",
         )
-    except: 
-        set_theme = None; print('gradio版本较旧, 不能自定义字体和颜色')
+    except:
+        set_theme = None
+        print('gradio版本较旧, 不能自定义字体和颜色')
     return set_theme
 
+
 advanced_css = """
 /* 设置表格的外边距为1em，内部单元格之间边框合并，空单元格显示. */
 .markdown-body table {
@@ -149,4 +153,4 @@ advanced_css = """
     padding: 1em;
     margin: 1em 2em 1em 0.5em;
 }
-"""
+"""

toolbox.py

@@ -1,14 +1,23 @@
-import markdown, mdtex2html, threading, importlib, traceback, importlib, inspect, re
+import markdown
+import mdtex2html
+import threading
+import importlib
+import traceback
+import importlib
+import inspect
+import re
 from show_math import convert as convert_math
 from functools import wraps, lru_cache
 
+
 def ArgsGeneralWrapper(f):
     """
         装饰器函数，用于重组输入参数，改变输入参数的顺序与结构。
     """
     def decorated(txt, txt2, *args, **kwargs):
         txt_passon = txt
-        if txt == "" and txt2 != "": txt_passon = txt2
+        if txt == "" and txt2 != "":
+            txt_passon = txt2
         yield from f(txt_passon, *args, **kwargs)
     return decorated
 
@@ -18,7 +27,7 @@ def get_reduce_token_percent(text):
         # text = "maximum context length is 4097 tokens. However, your messages resulted in 4870 tokens"
         pattern = r"(\d+)\s+tokens\b"
         match = re.findall(pattern, text)
-        EXCEED_ALLO = 500 # 稍微留一点余地，否则在回复时会因余量太少出问题
+        EXCEED_ALLO = 500  # 稍微留一点余地，否则在回复时会因余量太少出问题
         max_limit = float(match[0]) - EXCEED_ALLO
         current_tokens = float(match[1])
         ratio = max_limit/current_tokens
@@ -27,6 +36,7 @@ def get_reduce_token_percent(text):
     except:
         return 0.5, '不详'
 
+
 def predict_no_ui_but_counting_down(i_say, i_say_show_user, chatbot, top_p, temperature, history=[], sys_prompt='', long_connection=True):
     """
         调用简单的predict_no_ui接口，但是依然保留了些许界面心跳功能，当对话太长时，会自动采用二分法截断
@@ -46,21 +56,26 @@ def predict_no_ui_but_counting_down(i_say, i_say_show_user, chatbot, top_p, temp
     # list就是最简单的mutable结构，我们第一个位置放gpt输出，第二个位置传递报错信息
     mutable = [None, '']
     # multi-threading worker
+
     def mt(i_say, history):
         while True:
             try:
                 if long_connection:
-                    mutable[0] = predict_no_ui_long_connection(inputs=i_say, top_p=top_p, temperature=temperature, history=history, sys_prompt=sys_prompt)
+                    mutable[0] = predict_no_ui_long_connection(
+                        inputs=i_say, top_p=top_p, temperature=temperature, history=history, sys_prompt=sys_prompt)
                 else:
-                    mutable[0] = predict_no_ui(inputs=i_say, top_p=top_p, temperature=temperature, history=history, sys_prompt=sys_prompt)
+                    mutable[0] = predict_no_ui(
+                        inputs=i_say, top_p=top_p, temperature=temperature, history=history, sys_prompt=sys_prompt)
                 break
             except ConnectionAbortedError as token_exceeded_error:
                 # 尝试计算比例，尽可能多地保留文本
-                p_ratio, n_exceed = get_reduce_token_percent(str(token_exceeded_error))
+                p_ratio, n_exceed = get_reduce_token_percent(
+                    str(token_exceeded_error))
                 if len(history) > 0:
-                    history = [his[     int(len(his)    *p_ratio):      ] for his in history if his is not None]
+                    history = [his[int(len(his) * p_ratio):]
+                               for his in history if his is not None]
                 else:
-                    i_say = i_say[:     int(len(i_say)  *p_ratio)     ]
+                    i_say = i_say[:     int(len(i_say) * p_ratio)]
                 mutable[1] = f'警告，文本过长将进行截断，Token溢出数：{n_exceed}，截断比例：{(1-p_ratio):.0%}。'
             except TimeoutError as e:
                 mutable[0] = '[Local Message] 请求超时。'
@@ -69,42 +84,51 @@ def predict_no_ui_but_counting_down(i_say, i_say_show_user, chatbot, top_p, temp
                 mutable[0] = f'[Local Message] 异常：{str(e)}.'
                 raise RuntimeError(f'[Local Message] 异常：{str(e)}.')
     # 创建新线程发出http请求
-    thread_name = threading.Thread(target=mt, args=(i_say, history)); thread_name.start()
+    thread_name = threading.Thread(target=mt, args=(i_say, history))
+    thread_name.start()
     # 原来的线程则负责持续更新UI，实现一个超时倒计时，并等待新线程的任务完成
     cnt = 0
     while thread_name.is_alive():
         cnt += 1
-        chatbot[-1] = (i_say_show_user, f"[Local Message] {mutable[1]}waiting gpt response {cnt}/{TIMEOUT_SECONDS*2*(MAX_RETRY+1)}"+''.join(['.']*(cnt%4)))
+        chatbot[-1] = (i_say_show_user,
+                       f"[Local Message] {mutable[1]}waiting gpt response {cnt}/{TIMEOUT_SECONDS*2*(MAX_RETRY+1)}"+''.join(['.']*(cnt % 4)))
         yield chatbot, history, '正常'
         time.sleep(1)
     # 把gpt的输出从mutable中取出来
     gpt_say = mutable[0]
-    if gpt_say=='[Local Message] Failed with timeout.': raise TimeoutError
+    if gpt_say == '[Local Message] Failed with timeout.':
+        raise TimeoutError
     return gpt_say
 
+
 def write_results_to_file(history, file_name=None):
     """
         将对话记录history以Markdown格式写入文件中。如果没有指定文件名，则使用当前时间生成文件名。
     """
-    import os, time
+    import os
+    import time
     if file_name is None:
         # file_name = time.strftime("chatGPT分析报告%Y-%m-%d-%H-%M-%S", time.localtime()) + '.md'
-        file_name = 'chatGPT分析报告' + time.strftime("%Y-%m-%d-%H-%M-%S", time.localtime()) + '.md'
+        file_name = 'chatGPT分析报告' + \
+            time.strftime("%Y-%m-%d-%H-%M-%S", time.localtime()) + '.md'
     os.makedirs('./gpt_log/', exist_ok=True)
-    with open(f'./gpt_log/{file_name}', 'w', encoding = 'utf8') as f:
+    with open(f'./gpt_log/{file_name}', 'w', encoding='utf8') as f:
         f.write('# chatGPT 分析报告\n')
         for i, content in enumerate(history):
             try:    # 这个bug没找到触发条件，暂时先这样顶一下
-                if type(content) != str: content = str(content)
+                if type(content) != str:
+                    content = str(content)
             except:
                 continue
-            if i%2==0: f.write('## ')
+            if i % 2 == 0:
+                f.write('## ')
             f.write(content)
             f.write('\n\n')
     res = '以上材料已经被写入' + os.path.abspath(f'./gpt_log/{file_name}')
     print(res)
     return res
 
+
 def regular_txt_to_markdown(text):
     """
         将普通文本转换为Markdown格式的文本。
@@ -114,6 +138,7 @@ def regular_txt_to_markdown(text):
     text = text.replace('\n\n\n', '\n\n')
     return text
 
+
 def CatchException(f):
     """
         装饰器函数，捕捉函数f中的异常并封装到一个生成器中返回，并显示到聊天当中。
@@ -127,11 +152,14 @@ def CatchException(f):
             from toolbox import get_conf
             proxies, = get_conf('proxies')
             tb_str = '```\n' + traceback.format_exc() + '```'
-            if chatbot is None or len(chatbot) == 0: chatbot = [["插件调度异常","异常原因"]]
-            chatbot[-1] = (chatbot[-1][0], f"[Local Message] 实验性函数调用出错: \n\n{tb_str} \n\n当前代理可用性: \n\n{check_proxy(proxies)}")
+            if chatbot is None or len(chatbot) == 0:
+                chatbot = [["插件调度异常", "异常原因"]]
+            chatbot[-1] = (chatbot[-1][0],
+                           f"[Local Message] 实验性函数调用出错: \n\n{tb_str} \n\n当前代理可用性: \n\n{check_proxy(proxies)}")
             yield chatbot, history, f'异常 {e}'
     return decorated
 
+
 def HotReload(f):
     """
         装饰器函数，实现函数插件热更新
@@ -143,12 +171,15 @@ def HotReload(f):
         yield from f_hot_reload(*args, **kwargs)
     return decorated
 
+
 def report_execption(chatbot, history, a, b):
     """
         向chatbot中添加错误信息
     """
     chatbot.append((a, b))
-    history.append(a); history.append(b)
+    history.append(a)
+    history.append(b)
+
 
 def text_divide_paragraph(text):
     """
@@ -165,6 +196,7 @@ def text_divide_paragraph(text):
         text = "</br>".join(lines)
         return text
 
+
 def markdown_convertion(txt):
     """
         将Markdown格式的文本转换为HTML格式。如果包含数学公式，则先将公式转换为HTML格式。
@@ -172,16 +204,19 @@ def markdown_convertion(txt):
     pre = '<div class="markdown-body">'
     suf = '</div>'
     if ('$' in txt) and ('```' not in txt):
-        return pre + markdown.markdown(txt,extensions=['fenced_code','tables']) + '<br><br>' + markdown.markdown(convert_math(txt, splitParagraphs=False),extensions=['fenced_code','tables']) + suf
+        return pre + markdown.markdown(txt, extensions=['fenced_code', 'tables']) + '<br><br>' + markdown.markdown(convert_math(txt, splitParagraphs=False), extensions=['fenced_code', 'tables']) + suf
     else:
-        return pre + markdown.markdown(txt,extensions=['fenced_code','tables']) + suf
+        return pre + markdown.markdown(txt, extensions=['fenced_code', 'tables']) + suf
+
 
 def close_up_code_segment_during_stream(gpt_reply):
     """
         在gpt输出代码的中途（输出了前面的```，但还没输出完后面的```），补上后面的```
     """
-    if '```' not in gpt_reply: return gpt_reply
-    if gpt_reply.endswith('```'): return gpt_reply
+    if '```' not in gpt_reply:
+        return gpt_reply
+    if gpt_reply.endswith('```'):
+        return gpt_reply
 
     # 排除了以上两个情况，我们
     segments = gpt_reply.split('```')
@@ -191,19 +226,21 @@ def close_up_code_segment_during_stream(gpt_reply):
         return gpt_reply+'\n```'
     else:
         return gpt_reply
- 
 
 
 def format_io(self, y):
     """
         将输入和输出解析为HTML格式。将y中最后一项的输入部分段落化，并将输出部分的Markdown和数学公式转换为HTML格式。
     """
-    if y is None or y == []: return []
+    if y is None or y == []:
+        return []
     i_ask, gpt_reply = y[-1]
-    i_ask = text_divide_paragraph(i_ask) # 输入部分太自由，预处理一波
-    gpt_reply = close_up_code_segment_during_stream(gpt_reply)  # 当代码输出半截的时候，试着补上后个```
+    i_ask = text_divide_paragraph(i_ask)  # 输入部分太自由，预处理一波
+    gpt_reply = close_up_code_segment_during_stream(
+        gpt_reply)  # 当代码输出半截的时候，试着补上后个```
     y[-1] = (
-        None if i_ask is None else markdown.markdown(i_ask, extensions=['fenced_code','tables']),
+        None if i_ask is None else markdown.markdown(
+            i_ask, extensions=['fenced_code', 'tables']),
         None if gpt_reply is None else markdown_convertion(gpt_reply)
     )
     return y
@@ -265,6 +302,7 @@ def extract_archive(file_path, dest_dir):
         return ''
     return ''
 
+
 def find_recent_files(directory):
     """
         me: find files that is created with in one minutes under a directory with python, write a function
@@ -278,21 +316,29 @@ def find_recent_files(directory):
 
     for filename in os.listdir(directory):
         file_path = os.path.join(directory, filename)
-        if file_path.endswith('.log'): continue
+        if file_path.endswith('.log'):
+            continue
         created_time = os.path.getmtime(file_path)
         if created_time >= one_minute_ago:
-            if os.path.isdir(file_path): continue
+            if os.path.isdir(file_path):
+                continue
             recent_files.append(file_path)
 
     return recent_files
 
 
 def on_file_uploaded(files, chatbot, txt):
-    if len(files) == 0: return chatbot, txt
-    import shutil, os, time, glob
+    if len(files) == 0:
+        return chatbot, txt
+    import shutil
+    import os
+    import time
+    import glob
     from toolbox import extract_archive
-    try: shutil.rmtree('./private_upload/')
-    except: pass
+    try:
+        shutil.rmtree('./private_upload/')
+    except:
+        pass
     time_tag = time.strftime("%Y-%m-%d-%H-%M-%S", time.localtime())
     os.makedirs(f'private_upload/{time_tag}', exist_ok=True)
     err_msg = ''
@@ -300,13 +346,14 @@ def on_file_uploaded(files, chatbot, txt):
         file_origin_name = os.path.basename(file.orig_name)
         shutil.copy(file.name, f'private_upload/{time_tag}/{file_origin_name}')
         err_msg += extract_archive(f'private_upload/{time_tag}/{file_origin_name}',
-                        dest_dir=f'private_upload/{time_tag}/{file_origin_name}.extract')
-    moved_files = [fp for fp in glob.glob('private_upload/**/*', recursive=True)]
+                                   dest_dir=f'private_upload/{time_tag}/{file_origin_name}.extract')
+    moved_files = [fp for fp in glob.glob(
+        'private_upload/**/*', recursive=True)]
     txt = f'private_upload/{time_tag}'
     moved_files_str = '\t\n\n'.join(moved_files)
     chatbot.append(['我上传了文件，请查收',
-                    f'[Local Message] 收到以下文件: \n\n{moved_files_str}'+
-                    f'\n\n调用路径参数已自动修正到: \n\n{txt}'+
+                    f'[Local Message] 收到以下文件: \n\n{moved_files_str}' +
+                    f'\n\n调用路径参数已自动修正到: \n\n{txt}' +
                     f'\n\n现在您点击任意实验功能时，以上文件将被作为输入参数'+err_msg])
     return chatbot, txt
 
@@ -314,32 +361,37 @@ def on_file_uploaded(files, chatbot, txt):
 def on_report_generated(files, chatbot):
     from toolbox import find_recent_files
     report_files = find_recent_files('gpt_log')
-    if len(report_files) == 0: return None, chatbot
+    if len(report_files) == 0:
+        return None, chatbot
     # files.extend(report_files)
     chatbot.append(['汇总报告如何远程获取？', '汇总报告已经添加到右侧“文件上传区”（可能处于折叠状态），请查收。'])
     return report_files, chatbot
 
+
 @lru_cache(maxsize=128)
 def read_single_conf_with_lru_cache(arg):
-    try: r = getattr(importlib.import_module('config_private'), arg)
-    except: r = getattr(importlib.import_module('config'), arg)
+    try:
+        r = getattr(importlib.import_module('config_private'), arg)
+    except:
+        r = getattr(importlib.import_module('config'), arg)
     # 在读取API_KEY时，检查一下是不是忘了改config
-    if arg=='API_KEY':
+    if arg == 'API_KEY':
         # 正确的 API_KEY 是 "sk-" + 48 位大小写字母数字的组合
         API_MATCH = re.match(r"sk-[a-zA-Z0-9]{48}$", r)
         if API_MATCH:
             print(f"[API_KEY] 您的 API_KEY 是: {r[:15]}*** API_KEY 导入成功")
         else:
             assert False, "正确的 API_KEY 是 'sk-' + '48 位大小写字母数字' 的组合，请在config文件中修改API密钥, 添加海外代理之后再运行。" + \
-                        "（如果您刚更新过代码，请确保旧版config_private文件中没有遗留任何新增键值）"
-    if arg=='proxies':
-        if r is None: 
+                "（如果您刚更新过代码，请确保���版config_private文件中没有遗留任何新增键值）"
+    if arg == 'proxies':
+        if r is None:
             print('[PROXY] 网络代理状态：未配置。无代理状态下很可能无法访问。建议：检查USE_PROXY选项是否修改。')
-        else: 
+        else:
             print('[PROXY] 网络代理状态：已配置。配置信息如下：', r)
             assert isinstance(r, dict), 'proxies格式错误，请注意proxies选项的格式，不要遗漏括号。'
     return r
 
+
 def get_conf(*args):
     # 建议您复制一个config_private.py放自己的秘密, 如API和代理网址, 避免不小心传github被别人看到
     res = []
@@ -348,14 +400,17 @@ def get_conf(*args):
         res.append(r)
     return res
 
+
 def clear_line_break(txt):
     txt = txt.replace('\n', ' ')
     txt = txt.replace('  ', ' ')
     txt = txt.replace('  ', ' ')
     return txt
 
+
 class DummyWith():
     def __enter__(self):
         return self
+
     def __exit__(self, exc_type, exc_value, traceback):
-        return
+        return