fix errors discovered by pycyodestyle

async_crawler.py

@@ -1,5 +1,5 @@
-
 #!/usr/bin/env python
+
 '''
 Asynchronous web crawler written in Python 3.5+.
 
@@ -32,7 +32,8 @@ def sanity_checks(url=None):
 
     # fail early if robots denies all crawling
     if not robots.check(url=baseurl):
-        sys.exit("{baseurl} cannot be crawled (denied by robots.txt)".format(baseurl=baseurl))
+        sys.exit("{baseurl} cannot be crawled (denied by robots.txt)".format(
+            baseurl=baseurl))
 
     return(baseurl, robots)
 
@@ -48,8 +49,8 @@ def render_sitemap(base_url=None, crawled_urls=None, runtime=None):
         loader=jinja2.FileSystemLoader('templates')
     ).get_template('sitemap.html.j2')
 
-    rendered_html = template.render(
-        base_url=base_url, urlcount=urlcount, urls=sorted_urls, runtime=runtime)
+    rendered_html = template.render(base_url=base_url, urlcount=urlcount,
+                                    urls=sorted_urls, runtime=runtime)
 
     with open('sitemap.html', 'w') as outfile:
         outfile.write(rendered_html)
@@ -67,9 +68,11 @@ def main():
     baseurl, robots = sanity_checks(url=args.url)
 
     # create a crawler
-    async_crawler = AsyncCrawler(baseurl=baseurl, robots=robots, concurrency=args.concurrency)
+    async_crawler = AsyncCrawler(baseurl=baseurl, robots=robots,
+                                 concurrency=args.concurrency)
 
-    # create a task to run the crawler, run the loop and then gather the results.
+    # create a task to run the crawler, run the loop and then gather the
+    # results.
     task = asyncio.Task(async_crawler.main())
     loop = asyncio.get_event_loop()
     loop.run_until_complete(task)
@@ -84,9 +87,9 @@ def main():
 if __name__ == '__main__':
 
     parser = argparse.ArgumentParser(description='Recursive web crawler')
-    parser.add_argument("-u", "--url", required=True, help="Initial url to crawl")
+    parser.add_argument("-u", "--url", required=True, help="Initial url")
     parser.add_argument("-c", "--concurrency", required=False, type=int,
-                        default=100, help="Max number of pages to crawl concurrently")
+                        default=100, help="Max pages to crawl concurrently")
     args = parser.parse_args()
 
     main()