Remove f-string add supports for py35

Author: GoodManWEN

.github/workflows/python-package.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
-        python-version: ['3.6' , '3.7' , '3.8' , '3.9']
+        python-version: ['3.5', '3.6', '3.7', '3.8', '3.9']
 
     steps:
     - uses: actions/checkout@v2

ThreadPoolExecutorPlus/thread.py

@@ -213,7 +213,7 @@ def __init__(self, max_workers=None, thread_name_prefix='',
             # used to overlap I/O instead of CPU work.
             max_workers = DEFAULT_MAXIMUM_WORKER_NUM
         if max_workers < 1:
-            raise ValueError(f"max_workers must be greater than min_workers , min_workers must be greater than 1")
+            raise ValueError("max_workers must be greater than min_workers , min_workers must be greater than 1")
         elif 1 <= max_workers < self._min_workers:
             self._min_workers = max_workers
 

misc/stress_testing.py

@@ -30,7 +30,7 @@ async def report_thread(executor , statistics , dataflow  , scale_factor):
     line = deque()
     while True:
         await asyncio.sleep(2)
-        print(f"Report every 2 secs : [success] {statistics[0]} \t[fail] {statistics[1]} \t[dataflow] {'%.2f' % round(dataflow[0],2)} \t[currentthread] {len(executor._threads)} \t[qps] {round((statistics[0] / (time.time() - st)) , 2)}")
+        print("Report every 2 secs : [success] {0} \t[fail] {1} \t[dataflow] {2} \t[currentthread] {3} \t[qps] {4}".format(statistics[0], statistics[1]), '%.2f' % round(dataflow[0],2), len(executor._threads), round((statistics[0] / (time.time() - st)) , 2))
 
 async def main():
     loop = asyncio.get_running_loop()

setup.py

@@ -18,7 +18,7 @@ def get_install_requires(filename):
 
 # 
 url = 'https://github.com/GoodManWEN/ThreadPoolExecutorPlus'
-release = f'{url}/releases/latest'
+release = '{0}/releases/latest'.format(url)
 headers = {
     "User-Agent": "Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36",
     "Connection": "keep-alive",
@@ -30,8 +30,8 @@ def get_install_requires(filename):
 description = html.find('meta' ,{'name':'description'}).get('content')
 html = BeautifulSoup(rget(release , headers).text ,'lxml')
 version = html.find('div',{'class':'release-header'}).find('a').text
-logger.info(f"description: {description}")
-logger.info(f"version: {version}")
+logger.info("description: {0}".format(description))
+logger.info("version: {0}".format(version))
 
 #
 with open('README.md','r',encoding='utf-8') as f:
@@ -47,7 +47,7 @@ def get_install_requires(filename):
 
 for line in init_content:
     if line == "__version__ = ''\n":
-        long_description_lines_copy.append(f"__version__ = '{version}'\n")
+        long_description_lines_copy.append("__version__ = '{0}'\n".format(version))
     else:
         long_description_lines_copy.append(line)
 
@@ -70,6 +70,6 @@ def get_install_requires(filename):
         'Operating System :: POSIX :: Linux',
         'Operating System :: Microsoft :: Windows',
     ],
-    python_requires='>=3.6',
+    python_requires='>=3.5',
     keywords=["concurrent.futures" , "threading" , "multi-threads" ,"ThreadPoolExecutor"]
 )