prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  LogStats Extension should log the IPM and RPM to the stats on spider_closed signal
  ## Summary
  
  By default, the `scrapy.extensions.logstats.LogStats` log the details below to the standard logger every 60 seconds:
  
  - IPM (_Items per Minute_)
  - Items scraped
  - RPM (_Requests per Minute_)
  - Requests produced
  
  ## Motivation
  
  We often find the need to retrieve the **RPM** and **IPM** after a job is finished. We can calculate this manually or we can check the logs for the last update of *LogStats*. However, this is tedious and inefficient as `LogStats` already has this data but isn't putting them somewhere that is readily available after the job is finished.
  
  ## Describe alternatives you've considered
  
  We can pull out the last update of `LogStats` from the logs but pulling it from the API and filtering it out is expensive.
  
  ## Additional context
  
  None
  
  
  </issue>
  <code>
  [start of scrapy/extensions/logstats.py]
  1 import logging
  2 
  3 from twisted.internet import task
  4 
  5 from scrapy import signals
  6 from scrapy.exceptions import NotConfigured
  7 
  8 logger = logging.getLogger(__name__)
  9 
  10 
  11 class LogStats:
  12     """Log basic scraping stats periodically"""
  13 
  14     def __init__(self, stats, interval=60.0):
  15         self.stats = stats
  16         self.interval = interval
  17         self.multiplier = 60.0 / self.interval
  18         self.task = None
  19 
  20     @classmethod
  21     def from_crawler(cls, crawler):
  22         interval = crawler.settings.getfloat("LOGSTATS_INTERVAL")
  23         if not interval:
  24             raise NotConfigured
  25         o = cls(crawler.stats, interval)
  26         crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)
  27         crawler.signals.connect(o.spider_closed, signal=signals.spider_closed)
  28         return o
  29 
  30     def spider_opened(self, spider):
  31         self.pagesprev = 0
  32         self.itemsprev = 0
  33 
  34         self.task = task.LoopingCall(self.log, spider)
  35         self.task.start(self.interval)
  36 
  37     def log(self, spider):
  38         items = self.stats.get_value("item_scraped_count", 0)
  39         pages = self.stats.get_value("response_received_count", 0)
  40         irate = (items - self.itemsprev) * self.multiplier
  41         prate = (pages - self.pagesprev) * self.multiplier
  42         self.pagesprev, self.itemsprev = pages, items
  43 
  44         msg = (
  45             "Crawled %(pages)d pages (at %(pagerate)d pages/min), "
  46             "scraped %(items)d items (at %(itemrate)d items/min)"
  47         )
  48         log_args = {
  49             "pages": pages,
  50             "pagerate": prate,
  51             "items": items,
  52             "itemrate": irate,
  53         }
  54         logger.info(msg, log_args, extra={"spider": spider})
  55 
  56     def spider_closed(self, spider, reason):
  57         if self.task and self.task.running:
  58             self.task.stop()
  59
  [end of scrapy/extensions/logstats.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/scrapy/extensions/logstats.py b/scrapy/extensions/logstats.py
  --- a/scrapy/extensions/logstats.py
  +++ b/scrapy/extensions/logstats.py
  @@ -9,7 +9,10 @@
   
   
   class LogStats:
  -    """Log basic scraping stats periodically"""
  +    """Log basic scraping stats periodically like:
  +    * RPM - Requests per Minute
  +    * IPM - Items per Minute
  +    """
   
       def __init__(self, stats, interval=60.0):
           self.stats = stats
  @@ -35,24 +38,45 @@
           self.task.start(self.interval)
   
       def log(self, spider):
  -        items = self.stats.get_value("item_scraped_count", 0)
  -        pages = self.stats.get_value("response_received_count", 0)
  -        irate = (items - self.itemsprev) * self.multiplier
  -        prate = (pages - self.pagesprev) * self.multiplier
  -        self.pagesprev, self.itemsprev = pages, items
  +        self.calculate_stats()
   
           msg = (
               "Crawled %(pages)d pages (at %(pagerate)d pages/min), "
               "scraped %(items)d items (at %(itemrate)d items/min)"
           )
           log_args = {
  -            "pages": pages,
  -            "pagerate": prate,
  -            "items": items,
  -            "itemrate": irate,
  +            "pages": self.pages,
  +            "pagerate": self.prate,
  +            "items": self.items,
  +            "itemrate": self.irate,
           }
           logger.info(msg, log_args, extra={"spider": spider})
   
  +    def calculate_stats(self):
  +        self.items = self.stats.get_value("item_scraped_count", 0)
  +        self.pages = self.stats.get_value("response_received_count", 0)
  +        self.irate = (self.items - self.itemsprev) * self.multiplier
  +        self.prate = (self.pages - self.pagesprev) * self.multiplier
  +        self.pagesprev, self.itemsprev = self.pages, self.items
  +
       def spider_closed(self, spider, reason):
           if self.task and self.task.running:
               self.task.stop()
  +
  +        rpm_final, ipm_final = self.calculate_final_stats(spider)
  +        self.stats.set_value("responses_per_minute", rpm_final)
  +        self.stats.set_value("items_per_minute", ipm_final)
  +
  +    def calculate_final_stats(self, spider):
  +        start_time = self.stats.get_value("start_time")
  +        finished_time = self.stats.get_value("finished_time")
  +
  +        if not start_time or not finished_time:
  +            return None, None
  +
  +        mins_elapsed = (finished_time - start_time).seconds / 60
  +
  +        items = self.stats.get_value("item_scraped_count", 0)
  +        pages = self.stats.get_value("response_received_count", 0)
  +
  +        return (pages / mins_elapsed), (items / mins_elapsed)
  
verification_info: {"golden_diff": "diff --git a/scrapy/extensions/logstats.py b/scrapy/extensions/logstats.py\n--- a/scrapy/extensions/logstats.py\n+++ b/scrapy/extensions/logstats.py\n@@ -9,7 +9,10 @@\n \n \n class LogStats:\n-    \"\"\"Log basic scraping stats periodically\"\"\"\n+    \"\"\"Log basic scraping stats periodically like:\n+    * RPM - Requests per Minute\n+    * IPM - Items per Minute\n+    \"\"\"\n \n     def __init__(self, stats, interval=60.0):\n         self.stats = stats\n@@ -35,24 +38,45 @@\n         self.task.start(self.interval)\n \n     def log(self, spider):\n-        items = self.stats.get_value(\"item_scraped_count\", 0)\n-        pages = self.stats.get_value(\"response_received_count\", 0)\n-        irate = (items - self.itemsprev) * self.multiplier\n-        prate = (pages - self.pagesprev) * self.multiplier\n-        self.pagesprev, self.itemsprev = pages, items\n+        self.calculate_stats()\n \n         msg = (\n             \"Crawled %(pages)d pages (at %(pagerate)d pages/min), \"\n             \"scraped %(items)d items (at %(itemrate)d items/min)\"\n         )\n         log_args = {\n-            \"pages\": pages,\n-            \"pagerate\": prate,\n-            \"items\": items,\n-            \"itemrate\": irate,\n+            \"pages\": self.pages,\n+            \"pagerate\": self.prate,\n+            \"items\": self.items,\n+            \"itemrate\": self.irate,\n         }\n         logger.info(msg, log_args, extra={\"spider\": spider})\n \n+    def calculate_stats(self):\n+        self.items = self.stats.get_value(\"item_scraped_count\", 0)\n+        self.pages = self.stats.get_value(\"response_received_count\", 0)\n+        self.irate = (self.items - self.itemsprev) * self.multiplier\n+        self.prate = (self.pages - self.pagesprev) * self.multiplier\n+        self.pagesprev, self.itemsprev = self.pages, self.items\n+\n     def spider_closed(self, spider, reason):\n         if self.task and self.task.running:\n             self.task.stop()\n+\n+        rpm_final, ipm_final = self.calculate_final_stats(spider)\n+        self.stats.set_value(\"responses_per_minute\", rpm_final)\n+        self.stats.set_value(\"items_per_minute\", ipm_final)\n+\n+    def calculate_final_stats(self, spider):\n+        start_time = self.stats.get_value(\"start_time\")\n+        finished_time = self.stats.get_value(\"finished_time\")\n+\n+        if not start_time or not finished_time:\n+            return None, None\n+\n+        mins_elapsed = (finished_time - start_time).seconds / 60\n+\n+        items = self.stats.get_value(\"item_scraped_count\", 0)\n+        pages = self.stats.get_value(\"response_received_count\", 0)\n+\n+        return (pages / mins_elapsed), (items / mins_elapsed)\n", "issue": "LogStats Extension should log the IPM and RPM to the stats on spider_closed signal\n## Summary\r\n\r\nBy default, the `scrapy.extensions.logstats.LogStats` log the details below to the standard logger every 60 seconds:\r\n\r\n- IPM (_Items per Minute_)\r\n- Items scraped\r\n- RPM (_Requests per Minute_)\r\n- Requests produced\r\n\r\n## Motivation\r\n\r\nWe often find the need to retrieve the **RPM** and **IPM** after a job is finished. We can calculate this manually or we can check the logs for the last update of *LogStats*. However, this is tedious and inefficient as `LogStats` already has this data but isn't putting them somewhere that is readily available after the job is finished.\r\n\r\n## Describe alternatives you've considered\r\n\r\nWe can pull out the last update of `LogStats` from the logs but pulling it from the API and filtering it out is expensive.\r\n\r\n## Additional context\r\n\r\nNone\r\n\n", "before_files": [{"content": "import logging\n\nfrom twisted.internet import task\n\nfrom scrapy import signals\nfrom scrapy.exceptions import NotConfigured\n\nlogger = logging.getLogger(__name__)\n\n\nclass LogStats:\n    \"\"\"Log basic scraping stats periodically\"\"\"\n\n    def __init__(self, stats, interval=60.0):\n        self.stats = stats\n        self.interval = interval\n        self.multiplier = 60.0 / self.interval\n        self.task = None\n\n    @classmethod\n    def from_crawler(cls, crawler):\n        interval = crawler.settings.getfloat(\"LOGSTATS_INTERVAL\")\n        if not interval:\n            raise NotConfigured\n        o = cls(crawler.stats, interval)\n        crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)\n        crawler.signals.connect(o.spider_closed, signal=signals.spider_closed)\n        return o\n\n    def spider_opened(self, spider):\n        self.pagesprev = 0\n        self.itemsprev = 0\n\n        self.task = task.LoopingCall(self.log, spider)\n        self.task.start(self.interval)\n\n    def log(self, spider):\n        items = self.stats.get_value(\"item_scraped_count\", 0)\n        pages = self.stats.get_value(\"response_received_count\", 0)\n        irate = (items - self.itemsprev) * self.multiplier\n        prate = (pages - self.pagesprev) * self.multiplier\n        self.pagesprev, self.itemsprev = pages, items\n\n        msg = (\n            \"Crawled %(pages)d pages (at %(pagerate)d pages/min), \"\n            \"scraped %(items)d items (at %(itemrate)d items/min)\"\n        )\n        log_args = {\n            \"pages\": pages,\n            \"pagerate\": prate,\n            \"items\": items,\n            \"itemrate\": irate,\n        }\n        logger.info(msg, log_args, extra={\"spider\": spider})\n\n    def spider_closed(self, spider, reason):\n        if self.task and self.task.running:\n            self.task.stop()\n", "path": "scrapy/extensions/logstats.py"}]}